研究者紹介システム

青木 茂樹
アオキ シゲキ
大学院人間発達環境学研究科 人間環境学専攻
教授
発達科学部長;大学院人間発達環境学研究科長;国際人間科学部長
物理学関係
Last Updated :2022/01/10

研究者情報

所属

  • 【主配置】

    大学院人間発達環境学研究科 人間環境学専攻
  • 【配置】

    国際人間科学部 環境共生学科, 発達科学部 人間環境学科, 大学院人間発達環境学研究科 附属発達支援インスティテュート

学位

  • 理学博士, 名古屋大学

授業科目

ジャンル

  • 科学・技術 / 物理学

コメントテーマ

  • 素粒子
  • 宇宙ガンマ線
  • ニュートリノ振動

研究ニュース

研究活動

研究分野

  • 自然科学一般 / 素粒子、原子核、宇宙線、宇宙物理にする実験

受賞

  • 2016年03月 日本物理学会, 第21回論文賞, Observation of tau neutrino appearance in the CNGS beam with the OPERA experiment.(Prog. Theor. Exp. Phys. Vol.2014, No.10)

    N. Agafonova et al. (OPERA collaboration)

  • 2015年11月 Fundamental Physics Prize Foundation, 2016 Breakthrough Prize in Fundamental Physics, Super-Kamiokande, SNO, KamLAND, K2K/T2K, and Daya Bay experiments

    Super-Kamiokande, SNO, KamLAND, K, T, K, Daya Bay collaborations, 竹内 康雄, 青木 茂樹, 鈴木 州, 矢野 孝臣, 原 俊雄

    For the fundamental discovery and exploration of neutrino oscillations, revealing a new frontier beyond, and possibly far beyond, the Standard Model of particle physics., アメリカ合衆国

    国内外の国際的学術賞

  • 2002年03月 日本物理学会, 第7回論文賞, Direct Observation of Sequential Weak Decay of a Double Hypernucleus(Prog. Theor. Phys. Vol.85, No.6 1287)

    S. Aoki et al. (KEK E176 collaboraiton)

論文

  • C. Ahdida, A. Akmete, R. Albanese, A. Alexandrov, A. Anokhina, S. Aoki, G. Arduini, E. Atkin, N. Azorskiy, J. J. Back, A. Bagulya, F. Baaltasar Dos Santos, A. Baranov, F. Bardou, G. J. Barker, M. Battistin, J. Bauche, A. Bay, V. Bayliss, G. Bencivenni, A. Y. Berdnikov, Y. A. Berdnikov, M. Bertani, C. Betancourt, I. Bezshyiko, O. Bezshyyko, D. Bick, S. Bieschke, A. Blanco, J. Boehm, M. Bogomilov, I. Boiarska, K. Bondarenko, W. M. Bonivento, J. Borburgh, A. Boyarsky, R. Brenner, D. Breton, V. Büscher, A. Buonaura, L. Buonocore, S. Buontempo, S. Cadeddu, A. Calcaterra, M. Calviani, M. Campanelli, M. Casolino, N. Charitonidis, P. Chau, J. Chauveau, A. Chepurnov, M. Chernyavskiy, K.-Y. Choi, A. Chumakov, P. Ciambrone, V. Cicero, L. Congedo, K. Cornelis, M. Cristinziani, A. Crupano, G. M. Dallavalle, A. Datwyler, N. D’Ambrosio, G. D’Appollonio, R. de Asmundis, J. De Carvalho Saraiva, G. De Lellis, M. de Magistris, A. De Roeck, M. De Serio, D. De Simone, L. Dedenko, P. Dergachev, A. Di Crescenzo, L. Di Giulio, N. Di Marco, C. Dib, H. Dijkstra, V. Dmitrenko, L. A. Dougherty, A. Dolmatov, D. Domenici, S. Donskov, V. Drohan, A. Dubreuil, O. Durhan, M. Ehlert, E. Elikkaya, T. Enik, A. Etenko, F. Fabbri, O. Fedin, F. Fedotovs, G. Felici, M. Ferrillo, M. Ferro-Luzzi, K. Filippov, R. A. Fini, P. Fonte, C. Franco, M. Fraser, R. Fresa, R. Froeschl, C. Frugiuele, T. Fukuda, G. Galati, J. Gall, L. Gatignon, G. Gavrilov, V. Gentile, B. Goddard, L. Golinka-Bezshyyko, A. Golovatiuk, V. Golovtsov, D. Golubkov, A. Golutvin, P. Gorbounov, D. Gorbunov, S. Gorbunov, V. Gorkavenko, M. Gorshenkov, V. Grachev, A. L. Grandchamp, E. Graverini, J.-L. Grenard, D. Grenier, V. Grichine, N. Gruzinskii, A. M. Guler, Yu. Guz, G. J. Haefeli, C. Hagner, H. Hakobyan, I. W. Harris, E. van Herwijnen, C. Hessler, A. Hollnagel, B. Hosseini, M. Hushchyn, G. Iaselli, A. Iuliano, R. Jacobsson, D. Joković, M. Jonker, I. Kadenko, V. Kain, B. Kaiser, C. Kamiscioglu, D. Karpenkov, K. Kershaw, M. Khabibullin, E. Khalikov, G. Khaustov, G. Khoriauli, A. Khotyantsev, Y. G. Kim, V. Kim, N. Kitagawa, J.-W. Ko, K. Kodama, A. Kolesnikov, D. I. Kolev, V. Kolosov, M. Komatsu, A. Kono, N. Konovalova, S. Kormannshaus, I. Korol, I. Korol’ko, A. Korzenev, V. Kostyukhin, E. Koukovini Platia, S. Kovalenko, I. Krasilnikova, Y. Kudenko, E. Kurbatov, P. Kurbatov, V. Kurochka, E. Kuznetsova, H. M. Lacker, M. Lamont, G. Lanfranchi, O. Lantwin, A. Lauria, K. S. Lee, K. Y. Lee, J.-M. Lévy, V. P. Loschiavo, L. Lopes, E. Lopez Sola, V. Lyubovitskij, J. Maalmi, A. Magnan, V. Maleev, A. Malinin, F. Maltoni, Y. Manabe, A. K. Managadze, M. Manfredi, S. Marsh, A. M. Marshall, O. Mattelaer, A. Mefodev, P. Mermod, A. Miano, S. Mikado, Yu. Mikhaylov, D. A. Milstead, O. Mineev, A. Montanari, M. C. Montesi, K. Morishima, S. Movchan, Y. Muttoni, N. Naganawa, M. Nakamura, T. Nakano, S. Nasybulin, P. Ninin, A. Nishio, A. Novikov, B. Obinyakov, S. Ogawa, N. Okateva, B. Opitz, J. Osborne, M. Ovchynnikov, N. Owtscharenko, P. H. Owen, P. Pacholek, A. Paoloni, B. D. Park, A. Pastore, M. Patel, D. Pereyma, A. Perillo-Marcone, G. L. Petkov, K. Petridis, A. Petrov, D. Podgrudkov, V. Poliakov, N. Polukhina, J. Prieto Prieto, M. Prokudin, A. Prota, A. Quercia, A. Rademakers, A. Rakai, F. Ratnikov, T. Rawlings, F. Redi, S. Ricciardi, M. Rinaldesi, Volodymyr Rodin, Viktor Rodin, P. Robbe, A. B. Rodrigues Cavalcante, T. Roganova, H. Rokujo, G. Rosa, T. Rovelli, O. Ruchayskiy, T. Ruf, V. Samoylenko, V. Samsonov, F. Sanchez Galan, P. Santos Diaz, A. Sanz Ull, A. Saputi, O. Sato, E. S. Savchenko, J. S. Schliwinski, W. Schmidt-Parzefall, N. Serra, S. Sgobba, O. Shadura, A. Shakin, M. Shaposhnikov, P. Shatalov, T. Shchedrina, L. Shchutska, V. Shevchenko, H. Shibuya, S. Shirobokov, A. Shustov, S. B. Silverstein, S. Simone, R. Simoniello, M. Skorokhvatov, S. Smirnov, J. Y. Sohn, A. Sokolenko, E. Solodko, N. Starkov, L. Stoel, M. E. Stramaglia, D. Sukhonos, Y. Suzuki, S. Takahashi, J. L. Tastet, P. Teterin, S. Than Naing, I. Timiryasov, V. Tioukov, D. Tommasini, M. Torii, N. Tosi, F. Tramontano, D. Treille, R. Tsenov, S. Ulin, E. Ursov, A. Ustyuzhanin, Z. Uteshev, L. Uvarov, G. Vankova-Kirilova, F. Vannucci, V. Venturi, S. Vilchinski, Heinz Vincke, Helmut Vincke, C. Visone, K. Vlasik, A. Volkov, R. Voronkov, S. van Waasen, R. Wanke, P. Wertelaers, O. Williams, J.-K. Woo, M. Wurm, S. Xella, D. Yilmaz, A. U. Yilmazer, C. S. Yoon, Yu. Zaytsev, A. Zelenov, J. Zimmerman

    A<sc>bstract</sc> Dark matter is a well-established theoretical addition to the Standard Model supported by many observations in modern astrophysics and cosmology. In this context, the existence of weakly interacting massive particles represents an appealing solution to the observed thermal relic in the Universe. Indeed, a large experimental campaign is ongoing for the detection of such particles in the sub-GeV mass range. Adopting the benchmark scenario for light dark matter particles produced in the decay of a dark photon, with αD = 0.1 and mA = 3mχ, we study the potential of the SHiP experiment to detect such elusive particles through its Scattering and Neutrino detector (SND). In its 5-years run, corresponding to 2 · 1020 protons on target from the CERN SPS, we find that SHiP will improve the current limits in the mass range for the dark matter from about 1 MeV to 300 MeV. In particular, we show that SHiP will probe the thermal target for Majorana candidates in most of this mass window and even reach the Pseudo-Dirac thermal relic.

    Springer Science and Business Media LLC, 2021年04月20日, Journal of High Energy Physics, 2021 (4)

    研究論文(学術雑誌)

  • K Abe, N Akhlaq, R Akutsu, A Ali, C Alt, C Andreopoulos, L Anthony, M Antonova, S Aoki, A Ariga, T Arihara, Y Asada, Y Ashida, E T Atkin, Y Awataguchi, S Ban, M Barbi, G J Barker, G Barr, D Barrow, C Barry, M Batkiewicz-Kwasniak, A Beloshapkin, F Bench, V Berardi, S Berkman, L Berns, S Bhadra, S Bienstock, A Blanchet, A Blondel, S Bolognesi, T Bonus, B Bourguille, S B Boyd, D Brailsford, A Bravar, D Bravo Berguño, C Bronner, S Bron, A Bubak, M Buizza Avanzini, J Calcutt, T Campbell, S Cao, S L Cartwright, M G Catanesi, A Cervera, A Chappell, C Checchia, D Cherdack, N Chikuma, G Christodoulou, M Cicerchia, J Coleman, G Collazuol, L Cook, D Coplowe, A Cudd, A Dabrowska, G De Rosa, T Dealtry, P F Denner, S R Dennis, C Densham, A Dergacheva, F Di Lodovico, N Dokania, S Dolan, T A Doyle, O Drapier, J Dumarchez, P Dunne, A Eguchi, L Eklund, S Emery-Schrenk, A Ereditato, P Fernandez, T Feusels, A J Finch, G A Fiorentini, G Fiorillo, C Francois, M Friend, Y Fujii, R Fujita, D Fukuda, R Fukuda, Y Fukuda, K Fusshoeller, K Gameil, C Giganti, T Golan, M Gonin, A Gorin, M Guigue, D R Hadley, J T Haigh, P Hamacher-Baumann, D A Harris, M Hartz, T Hasegawa, S Hassani, N C Hastings, T Hayashino, Y Hayato, A Hiramoto, M Hogan, J Holeczek, N T Hong Van, T Honjo, F Iacob, A K Ichikawa, M Ikeda, T Ishida, T Ishii, M Ishitsuka, K Iwamoto, A Izmaylov, N Izumi, M Jakkapu, B Jamieson, S J Jenkins, C Jesús-Valls, M Jiang, S Johnson, P Jonsson, C K Jung, P B Jurj, M Kabirnezhad, A C Kaboth, T Kajita, H Kakuno, J Kameda, D Karlen, S P Kasetti, Y Kataoka, Y Katayama, T Katori, Y Kato, E Kearns, M Khabibullin, A Khotjantsev, T Kikawa, H Kikutani, H Kim, J Kim, S King, J Kisiel, A Knight, A Knox, T Kobata, T Kobayashi, L Koch, T Koga, A Konaka, L L Kormos, Y Koshio, A Kostin, K Kowalik, H Kubo, Y Kudenko, N Kukita, S Kuribayashi, R Kurjata, T Kutter, M Kuze, L Labarga, J Lagoda, M Lamoureux, D Last, M Laveder, M Lawe, M Licciardi, T Lindner, R P Litchfield, S L Liu, X Li, A Longhin, L Ludovici, X Lu, T Lux, L N Machado, L Magaletti, K Mahn, M Malek, S Manly, L Maret, A D Marino, L Marti-Magro, J F Martin, T Maruyama, T Matsubara, K Matsushita, V Matveev, C Mauger, K Mavrokoridis, E Mazzucato, M McCarthy, N McCauley, J McElwee, K S McFarland, C McGrew, A Mefodiev, C Metelko, M Mezzetto, A Minamino, O Mineev, S Mine, M Miura, L Molina Bueno, S Moriyama, J Morrison, Th A Mueller, L Munteanu, S Murphy, Y Nagai, T Nakadaira, M Nakahata, Y Nakajima, A Nakamura, K G Nakamura, K Nakamura, Y Nakano, S Nakayama, T Nakaya, K Nakayoshi, C Nantais, C E R Naseby, T V Ngoc, V Q Nguyen, K Niewczas, K Nishikawa, Y Nishimura, E Noah, T S Nonnenmacher, F Nova, P Novella, J Nowak, J C Nugent, H M O’Keeffe, L O’Sullivan, T Odagawa, T Ogawa, R Okada, K Okumura, T Okusawa, S M Oser, R A Owen, Y Oyama, V Palladino, J L Palomino, V Paolone, M Pari, W C Parker, S Parsa, J Pasternak, P Paudyal, M Pavin, D Payne, G C Penn, L Pickering, C Pidcott, G Pintaudi, E S Pinzon Guerra, C Pistillo, B Popov, K Porwit, M Posiadala-Zezula, A Pritchard, B Quilain, T Radermacher, E Radicioni, B Radics, P N Ratoff, E Reinherz-Aronis, C Riccio, E Rondio, S Roth, A Rubbia, A C Ruggeri, C Ruggles, A Rychter, K Sakashita, F Sánchez, G Santucci, C M Schloesser, K Scholberg, J Schwehr, M Scott, Y Seiya, T Sekiguchi, H Sekiya, D Sgalaberna, R Shah, A Shaikhiev, F Shaker, A Shaykina, M Shiozawa, W Shorrock, A Shvartsman, K Skwarczynski, A Smirnov, M Smy, J T Sobczyk, H Sobel, F J P Soler, Y Sonoda, R Spina, J Steinmann, S Suvorov, A Suzuki, S Y Suzuki, Y Suzuki, A A Sztuc, M Tada, M Tajima, A Takeda, Y Takeuchi, H K Tanaka, H A Tanaka, S Tanaka, Y Tanihara, M Tani, N Teshima, L F Thompson, W Toki, C Touramanis, T Towstego, K M Tsui, T Tsukamoto, M Tzanov, Y Uchida, W Uno, M Vagins, S Valder, Z Vallari, D Vargas, G Vasseur, C Vilela, W G S Vinning, T Vladisavljevic, V V Volkov, T Wachala, J Walker, J G Walsh, Y Wang, D Wark, M O Wascko, A Weber, R Wendell, M J Wilking, C Wilkinson, J R Wilson, R J Wilson, K Wood, C Wret, J Xia, Y Yamada, K Yamamoto, C Yanagisawa, G Yang, T Yano, K Yasutome, S Yen, N Yershov, M Yokoyama, T Yoshida, Y Yoshimoto, M Yu, A Zalewska, J Zalipska, K Zaremba, G Zarnecki, M Ziembicki, E D Zimmerman, M Zito, S Zsoldos, A Zykova

    Abstract We report measurements of the flux-integrated $\overline{\nu}_\mu$ and $\overline{\nu}_\mu+\nu_\mu$ charged-current cross-sections on water and hydrocarbon targets using the T2K anti-neutrino beam with a mean beam energy of 0.86 GeV. The signal is defined as the (anti-)neutrino charged-current interaction with one induced $\mu^\pm$ and no detected charged pion or proton. These measurements are performed using a new WAGASCI module recently added to the T2K setup in combination with the INGRID Proton Module. The phase space of muons is restricted to the high-detection efficiency region, $p_{\mu}&gt;400~{\rm MeV}/c$ and $\theta_{\mu}&lt;30^{\circ}$, in the laboratory frame. An absence of pions and protons in the detectable phase spaces of $p_{\pi}&gt;200~{\rm MeV}/c$, $\theta_{\pi}&lt;70^{\circ}$ and $p_{\rm p}&gt;600~{\rm MeV}/c$, $\theta_{\rm p}&lt;70^{\circ}$ is required. In this paper, both the $\overline{\nu}_\mu$ cross-sections and $\overline{\nu}_\mu+\nu_\mu$ cross-sections on water and hydrocarbon targets and their ratios are provided by using the D’Agostini unfolding method. The results of the integrated $\overline{\nu}_\mu$ cross-section measurements over this phase space are $\sigma_{\rm H_{2}O}=(1.082\pm0.068(\rm stat.)^{+0.145}_{-0.128}(\rm syst.)) \times 10^{-39}\,{\rm cm^{2} / nucleon}$, $\sigma_{\rm CH}=(1.096\pm0.054(\rm stat.)^{+0.132}_{-0.117}(\rm syst.)) \times 10^{-39}\,{\rm cm^{2} / nucleon}$, and $\sigma_{\rm H_{2}O}/\sigma_{\rm CH} = 0.987\pm0.078(\rm stat.)^{+0.093}_{-0.090}(\rm syst.)$. The $\overline{\nu}_\mu+\nu_\mu$ cross-section is $\sigma_{\rm H_{2}O} = (1.155\pm0.064(\rm stat.)^{+0.148}_{-0.129}(\rm syst.)) \times 10^{-39}\,{\rm cm^{2} / nucleon}$, $\sigma_{\rm CH}=(1.159\pm0.049(\rm stat.)^{+0.129}_{-0.115}(\rm syst.)) \times 10^{-39}\,{\rm cm^{2} / nucleon}$, and $\sigma_{\rm H_{2}O}/\sigma_{\rm CH}=0.996\pm0.069(\rm stat.)^{+0.083}_{-0.078}(\rm syst.)$.

    Oxford University Press (OUP), 2021年04月19日, Progress of Theoretical and Experimental Physics, 2021 (4)

    研究論文(学術雑誌)

  • H Oshima, T Matsuo, A Ali, S Aoki, L Berns, T Fukuda, Y Hanaoka, Y Hayato, A Hiramoto, A K Ichikawa, H Kawahara, T Kikawa, R Komatani, M Komatsu, K Kuretsubo, T Marushima, H Matsumoto, S Mikado, A Minamino, K Mizuno, Y Morimoto, K Morishima, N Naganawa, M Naiki, M Nakamura, Y Nakamura, N Nakano, T Nakano, T Nakaya, A Nishio, T Odagawa, S Ogawa, H Rokujo, O Sato, H Shibuya, K Sugimura, L Suzui, Y Suzuki, H Takagi, S Takahashi, T Takao, Y Tanihara, R Watanabe, K Yamada, K Yasutome, M Yokoyama

    Abstract We have carried out $\nu_{\mu}$ charged-current interaction measurement on iron using an emulsion detector exposed to the T2K neutrino beam in the J-PARC neutrino facility. The data samples correspond to $4.0 \times 10^{19}$ protons on target, and the neutrino mean energy is 1.49 GeV. The emulsion detector is suitable for precision measurements of charged particles produced in neutrino–iron interactions with a low momentum threshold thanks to a thin-layered structure and sub-$\mu$m spatial resolution. The charged particles are successfully detected, and their multiplicities are measured using the emulsion detector. The cross section was measured to be $\sigma^{\mathrm{Fe } }_{\mathrm{CC } } = (1.28 \pm 0.11({\mathrm{stat. } })^{+0.12}_{-0.11}({\mathrm{syst. } })) \times 10^{-38} \, {\mathrm{cm } }^{2}/{\mathrm{nucleon } }$. The cross section in a limited kinematic phase space of induced muons, $\theta_{\mu} &lt; 45^{\circ}$ and $p_{\mu} &gt; 400 \, {\rm MeV}/c$, on iron was $\sigma^{\mathrm{Fe } }_{\mathrm{CC \hspace{1mm} phase \hspace{0.5mm} space } } = (0.84 \pm 0.07({\mathrm{stat. } })^{+0.07}_{-0.06}({\mathrm{syst. } })) \times 10^{-38} \, {\mathrm{cm } }^{2}/{\mathrm{nucleon } }$. The cross-section results are consistent with previous values obtained via different techniques using the same beamline, and they are reproduced well by current neutrino interaction models. These results demonstrate the capability of the detector in the detailed measurement of neutrino–nucleus interactions around the 1 GeV energy region.

    Oxford University Press (OUP), 2021年03月15日, Progress of Theoretical and Experimental Physics, 2021 (3)

    研究論文(学術雑誌)

  • K. Abe, N. Akhlaq, R. Akutsu, A. Ali, C. Alt, C. Andreopoulos, M. Antonova, S. Aoki, T. Arihara, Y. Asada, Y. Ashida, E. T. Atkin, Y. Awataguchi, G. J. Barker, G. Barr, D. Barrow, M. Batkiewicz-Kwasniak, A. Beloshapkin, F. Bench, V. Berardi, L. Berns, S. Bhadra, A. Blondel, S. Bolognesi, T. Bonus, B. Bourguille, S. B. Boyd, A. Bravar, D. Bravo Berguño, C. Bronner, S. Bron, A. Bubak, M. Buizza Avanzini, S. Cao, S. L. Cartwright, M. G. Catanesi, A. Cervera, D. Cherdack, G. Christodoulou, M. Cicerchia, J. Coleman, G. Collazuol, L. Cook, D. Coplowe, A. Cudd, G. De Rosa, T. Dealtry, C. C. Delogu, S. R. Dennis, C. Densham, A. Dergacheva, F. Di Lodovico, S. Dolan, T. A. Doyle, J. Dumarchez, P. Dunne, A. Eguchi, L. Eklund, S. Emery-Schrenk, A. Ereditato, A. J. Finch, G. A. Fiorentini, C. Francois, M. Friend, Y. Fujii, R. Fukuda, Y. Fukuda, K. Fusshoeller, C. Giganti, M. Gonin, A. Gorin, M. Guigue, D. R. Hadley, P. Hamacher-Baumann, M. Hartz, T. Hasegawa, S. Hassani, N. C. Hastings, Y. Hayato, A. Hiramoto, M. Hogan, J. Holeczek, N. T. Hong Van, T. Honjo, F. Iacob, A. K. Ichikawa, M. Ikeda, T. Ishida, M. Ishitsuka, K. Iwamoto, A. Izmaylov, N. Izumi, M. Jakkapu, B. Jamieson, S. J. Jenkins, C. Jesús-Valls, P. Jonsson, C. K. Jung, P. B. Jurj, M. Kabirnezhad, H. Kakuno, J. Kameda, S. P. Kasetti, Y. Kataoka, Y. Katayama, T. Katori, E. Kearns, M. Khabibullin, A. Khotjantsev, T. Kikawa, H. Kikutani, S. King, J. Kisiel, T. Kobata, T. Kobayashi, L. Koch, A. Konaka, L. L. Kormos, Y. Koshio, A. Kostin, K. Kowalik, Y. Kudenko, S. Kuribayashi, R. Kurjata, T. Kutter, M. Kuze, L. Labarga, J. Lagoda, M. Lamoureux, D. Last, M. Laveder, M. Lawe, R. P. Litchfield, S. L. Liu, A. Longhin, L. Ludovici, X. Lu, T. Lux, L. N. Machado, L. Magaletti, K. Mahn, M. Malek, S. Manly, L. Maret, A. D. Marino, L. Marti-Magro, T. Maruyama, T. Matsubara, K. Matsushita, C. Mauger, K. Mavrokoridis, E. Mazzucato, N. McCauley, J. McElwee, K. S. McFarland, C. McGrew, A. Mefodiev, M. Mezzetto, A. Minamino, O. Mineev, S. Mine, M. Miura, L. Molina Bueno, S. Moriyama, Th. A. Mueller, L. Munteanu, Y. Nagai, T. Nakadaira, M. Nakahata, Y. Nakajima, A. Nakamura, K. Nakamura, Y. Nakano, S. Nakayama, T. Nakaya, K. Nakayoshi, C. E. R. Naseby, T. V. Ngoc, V. Q. Nguyen, K. Niewczas, Y. Nishimura, E. Noah, T. S. Nonnenmacher, F. Nova, J. Nowak, J. C. Nugent, H. M. O’Keeffe, L. O’Sullivan, T. Odagawa, T. Ogawa, R. Okada, K. Okumura, T. Okusawa, R. A. Owen, Y. Oyama, V. Palladino, V. Paolone, M. Pari, W. C. Parker, S. Parsa, J. Pasternak, M. Pavin, D. Payne, G. C. Penn, L. Pickering, C. Pidcott, G. Pintaudi, C. Pistillo, B. Popov, K. Porwit, M. Posiadala-Zezula, A. Pritchard, B. Quilain, T. Radermacher, E. Radicioni, B. Radics, P. N. Ratoff, C. Riccio, E. Rondio, S. Roth, A. Rubbia, A. C. Ruggeri, C. Ruggles, A. Rychter, K. Sakashita, F. Sánchez, G. Santucci, C. M. Schloesser, K. Scholberg, M. Scott, Y. Seiya, T. Sekiguchi, H. Sekiya, D. Sgalaberna, A. Shaikhiev, A. Shaykina, M. Shiozawa, W. Shorrock, A. Shvartsman, K. Skwarczynski, M. Smy, J. T. Sobczyk, H. Sobel, F. J. P. Soler, Y. Sonoda, R. Spina, S. Suvorov, A. Suzuki, S. Y. Suzuki, Y. Suzuki, A. A. Sztuc, M. Tada, M. Tajima, A. Takeda, Y. Takeuchi, H. K. Tanaka, Y. Tanihara, M. Tani, N. Teshima, L. F. Thompson, W. Toki, C. Touramanis, T. Towstego, K. M. Tsui, T. Tsukamoto, M. Tzanov, Y. Uchida, M. Vagins, S. Valder, D. Vargas, G. Vasseur, C. Vilela, W. G. S. Vinning, T. Vladisavljevic, T. Wachala, J. Walker, J. G. Walsh, Y. Wang, D. Wark, M. O. Wascko, A. Weber, R. Wendell, M. J. Wilking, C. Wilkinson, J. R. Wilson, K. Wood, C. Wret, J. Xia, K. Yamamoto, C. Yanagisawa, G. Yang, T. Yano, K. Yasutome, N. Yershov, M. Yokoyama, T. Yoshida, M. Yu, A. Zalewska, J. Zalipska, K. Zaremba, G. Zarnecki, M. Ziembicki, M. Zito, S. Zsoldos

    American Physical Society (APS), 2021年01月26日, Physical Review D, 103 (1)

    研究論文(学術雑誌)

  • K. Abe, N. Akhlaq, R. Akutsu, A. Ali, C. Alt, C. Andreopoulos, L. Anthony, M. Antonova, S. Aoki, A. Ariga, T. Arihara, Y. Asada, Y. Ashida, E. T. Atkin, Y. Awataguchi, S. Ban, M. Barbi, G. J. Barker, G. Barr, D. Barrow, C. Barry, M. Batkiewicz-Kwasniak, A. Beloshapkin, F. Bench, V. Berardi, L. Berns, S. Bhadra, S. Bienstock, A. Blondel, S. Bolognesi, T. Bonus, B. Bourguille, S. B. Boyd, D. Brailsford, A. Bravar, D. Bravo Berguño, C. Bronner, S. Bron, A. Bubak, M. Buizza Avanzini, J. Calcutt, T. Campbell, S. Cao, S. L. Cartwright, M. G. Catanesi, A. Cervera, A. Chappell, C. Checchia, D. Cherdack, N. Chikuma, G. Christodoulou, M. Cicerchia, J. Coleman, G. Collazuol, L. Cook, D. Coplowe, A. Cudd, A. Dabrowska, G. De Rosa, T. Dealtry, P. F. Denner, S. R. Dennis, C. Densham, F. Di Lodovico, N. Dokania, S. Dolan, T. A. Doyle, O. Drapier, J. Dumarchez, P. Dunne, A. Eguchi, L. Eklund, S. Emery-Schrenk, A. Ereditato, P. Fernandez, T. Feusels, A. J. Finch, G. A. Fiorentini, G. Fiorillo, C. Francois, M. Friend, Y. Fujii, R. Fujita, D. Fukuda, R. Fukuda, Y. Fukuda, K. Fusshoeller, C. Giganti, T. Golan, M. Gonin, A. Gorin, M. Guigue, D. R. Hadley, J. T. Haigh, P. Hamacher-Baumann, M. Hartz, T. Hasegawa, S. Hassani, N. C. Hastings, T. Hayashino, Y. Hayato, A. Hiramoto, M. Hogan, J. Holeczek, N. T. Hong Van, T. Honjo, F. Iacob, A. K. Ichikawa, M. Ikeda, T. Ishida, T. Ishii, M. Ishitsuka, K. Iwamoto, A. Izmaylov, N. Izumi, M. Jakkapu, B. Jamieson, S. J. Jenkins, C. Jesús-Valls, M. Jiang, S. Johnson, P. Jonsson, C. K. Jung, X. Junjie, P. B. Jurj, M. Kabirnezhad, A. C. Kaboth, T. Kajita, H. Kakuno, J. Kameda, D. Karlen, S. P. Kasetti, Y. Kataoka, Y. Katayama, T. Katori, Y. Kato, E. Kearns, M. Khabibullin, A. Khotjantsev, T. Kikawa, H. Kikutani, H. Kim, S. King, J. Kisiel, A. Knight, A. Knox, T. Kobata, T. Kobayashi, L. Koch, T. Koga, A. Konaka, L. L. Kormos, Y. Koshio, A. Kostin, K. Kowalik, H. Kubo, Y. Kudenko, N. Kukita, S. Kuribayashi, R. Kurjata, T. Kutter, M. Kuze, L. Labarga, J. Lagoda, M. Lamoureux, D. Last, M. Laveder, M. Lawe, M. Licciardi, T. Lindner, R. P. Litchfield, S. L. Liu, X. Li, A. Longhin, L. Ludovici, X. Lu, T. Lux, L. N. Machado, L. Magaletti, K. Mahn, M. Malek, S. Manly, L. Maret, A. D. Marino, L. Marti-Magro, J. F. Martin, T. Maruyama, T. Matsubara, K. Matsushita, V. Matveev, C. Mauger, K. Mavrokoridis, E. Mazzucato, M. McCarthy, N. McCauley, J. McElwee, K. S. McFarland, C. McGrew, A. Mefodiev, C. Metelko, M. Mezzetto, A. Minamino, O. Mineev, S. Mine, M. Miura, L. Molina Bueno, S. Moriyama, J. Morrison, Th. A. Mueller, L. Munteanu, S. Murphy, Y. Nagai, T. Nakadaira, M. Nakahata, Y. Nakajima, A. Nakamura, K. G. Nakamura, K. Nakamura, Y. Nakano, S. Nakayama, T. Nakaya, K. Nakayoshi, C. Nantais, C. E. R. Naseby, T. V. Ngoc, K. Niewczas, K. Nishikawa, Y. Nishimura, E. Noah, T. S. Nonnenmacher, F. Nova, P. Novella, J. Nowak, J. C. Nugent, H. M. O’Keeffe, L. O’Sullivan, T. Odagawa, T. Ogawa, R. Okada, K. Okumura, T. Okusawa, S. M. Oser, R. A. Owen, Y. Oyama, V. Palladino, J. L. Palomino, V. Paolone, M. Pari, W. C. Parker, S. Parsa, J. Pasternak, P. Paudyal, M. Pavin, D. Payne, G. C. Penn, L. Pickering, C. Pidcott, G. Pintaudi, E. S. Pinzon Guerra, C. Pistillo, B. Popov, K. Porwit, M. Posiadala-Zezula, A. Pritchard, B. Quilain, T. Radermacher, E. Radicioni, B. Radics, P. N. Ratoff, E. Reinherz-Aronis, C. Riccio, E. Rondio, S. Roth, A. Rubbia, A. C. Ruggeri, C. A. Ruggles, A. Rychter, K. Sakashita, F. Sánchez, G. Santucci, C. M. Schloesser, K. Scholberg, J. Schwehr, M. Scott, Y. Seiya, T. Sekiguchi, H. Sekiya, D. Sgalaberna, R. Shah, A. Shaikhiev, F. Shaker, A. Shaykina, M. Shiozawa, W. Shorrock, A. Shvartsman, A. Smirnov, M. Smy, J. T. Sobczyk, H. Sobel, F. J. P. Soler, Y. Sonoda, J. Steinmann, S. Suvorov, A. Suzuki, S. Y. Suzuki, Y. Suzuki, A. A. Sztuc, M. Tada, M. Tajima, A. Takeda, Y. Takeuchi, H. K. Tanaka, H. A. Tanaka, S. Tanaka, Y. Tanihara, M. Tani, N. Teshima, L. F. Thompson, W. Toki, C. Touramanis, T. Towstego, K. M. Tsui, T. Tsukamoto, M. Tzanov, Y. Uchida, M. Vagins, S. Valder, Z. Vallari, D. Vargas, G. Vasseur, C. Vilela, W. G. S. Vinning, T. Vladisavljevic, V. V. Volkov, T. Wachala, J. Walker, J. G. Walsh, Y. Wang, D. Wark, M. O. Wascko, A. Weber, R. Wendell, M. J. Wilking, C. Wilkinson, J. R. Wilson, R. J. Wilson, K. Wood, C. Wret, Y. Yamada, K. Yamamoto, C. Yanagisawa, G. Yang, T. Yano, K. Yasutome, S. Yen, N. Yershov, M. Yokoyama, T. Yoshida, M. Yu, A. Zalewska, J. Zalipska, K. Zaremba, G. Zarnecki, M. Ziembicki, E. D. Zimmerman, M. Zito, S. Zsoldos, A. Zykova

    A<sc>bstract</sc> The electron (anti-)neutrino component of the T2K neutrino beam constitutes the largest background in the measurement of electron (anti-)neutrino appearance at the far detector. The electron neutrino scattering is measured directly with the T2K off-axis near detector, ND280. The selection of the electron (anti-)neutrino events in the plastic scintillator target from both neutrino and anti-neutrino mode beams is discussed in this paper. The flux integrated single differential charged-current inclusive electron (anti-)neutrino cross-sections, dσ/dp and dσ/d cos(θ), and the total cross-sections in a limited phase-space in momentum and scattering angle (p > 300 MeV/c and θ ≤ 45°) are measured using a binned maximum likelihood fit and compared to the neutrino Monte Carlo generator predictions, resulting in good agreement.

    Springer Science and Business Media LLC, 2020年10月19日, Journal of High Energy Physics, 2020 (10), 英語

    研究論文(学術雑誌)

  • A. Hiramoto, Y. Suzuki, A. Ali, S. Aoki, L. Berns, T. Fukuda, Y. Hanaoka, Y. Hayato, A. K. Ichikawa, H. Kawahara, T. Kikawa, T. Koga, R. Komatani, M. Komatsu, Y. Kosakai, T. Matsuo, S. Mikado, A. Minamino, K. Mizuno, Y. Morimoto, K. Morishima, N. Naganawa, M. Naiki, M. Nakamura, Y. Nakamura, N. Nakano, T. Nakano, T. Nakaya, A. Nishio, T. Odagawa, S. Ogawa, H. Oshima, H. Rokujo, I. Sanjana, O. Sato, H. Shibuya, K. Sugimura, L. Suzui, H. Takagi, T. Takao, Y. Tanihara, K. Yasutome, M. Yokoyama

    American Physical Society (APS), 2020年10月15日, Physical Review D, 102 (7)

    研究論文(学術雑誌)

  • N. Agafonova, A. Aleksandrov, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, A. Bertolin, C. Bozza, R. Brugnera, A. Buonaura, S. Buontempo, M. Chernyavskiy, A. Chukanov, L. Consiglio, N. D’Ambrosio, G. De Lellis, M. De Serio, P. del Amo Sanchez, A. Di Crescenzo, D. Di Ferdinando, N. Di Marco, S. Dmitrievski, M. Dracos, D. Duchesneau, S. Dusini, T. Dzhatdoev, J. Ebert, A. Ereditato, R. A. Fini, F. Fornari, T. Fukuda, G. Galati, A. Garfagnini, V. Gentile, J. Goldberg, S. Gorbunov, Y. Gornushkin, G. Grella, A. M. Guler, C. Gustavino, C. Hagner, T. Hara, T. Hayakawa, A. Hollnagel, K. Ishiguro, A. Iuliano, K. Jakovcic, C. Jollet, C. Kamiscioglu, M. Kamiscioglu, S. H. Kim, N. Kitagawa, B. Klicek, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, F. Laudisio, A. Lauria, A. Longhin, P. Loverre, A. Malgin, M. Malenica, G. Mandrioli, T. Matsuo, V. Matveev, N. Mauri, E. Medinaceli, A. Meregaglia, S. Mikado, M. Miyanishi, F. Mizutani, P. Monacelli, M. C. Montesi, K. Morishima, M. T. Muciaccia, N. Naganawa, T. Naka, M. Nakamura, T. Nakano, K. Niwa, N. Okateva, S. Ogawa, K. Ozaki, A. Paoloni, L. Paparella, B. D. Park, L. Pasqualini, A. Pastore, L. Patrizii, H. Pessard, D. Podgrudkov, N. Polukhina, M. Pozzato, F. Pupilli, M. Roda, T. Roganova, H. Rokujo, G. Rosa, O. Ryazhskaya, O. Sato, A. Schembri, I. Shakirianova, T. Shchedrina, H. Shibuya, E. Shibayama, T. Shiraishi, S. Simone, C. Sirignano, G. Sirri, A. Sotnikov, M. Spinetti, L. Stanco, N. Starkov, S. M. Stellacci, M. Stipcevic, P. Strolin, S. Takahashi, M. Tenti, F. Terranova, V. Tioukov, S. Vasina, P. Vilain, E. Voevodina, L. Votano, J. L. Vuilleumier, G. Wilquet, C. S. Yoon

    Abstract An event topology with two secondary vertices compatible with the decay of short-lived particles was found in the analysis of neutrino interactions in the OPERA target. The observed topology is compatible with tau neutrino charged current (CC) interactions with charm production and neutrino neutral current (NC) interactions with $$c\overline{c}$$cc¯ pair production. However, other processes can mimic this topology. A dedicated analysis was implemented to identify the underlying process. A Monte Carlo simulation was developed and complementary procedures were introduced in the kinematic reconstruction. A multivariate analysis technique was used to achieve an optimal separation of signal from background. Most likely, this event is a $$\nu _{\tau }$$ντ CC interaction with charm production, the tau and charm particle decaying into 1 prong and 2 prongs, respectively. The significance of this observation is evaluated.

    Springer Science and Business Media LLC, 2020年08月04日, The European Physical Journal C, 80 (8)

    研究論文(学術雑誌)

  • K. Abe, R. Akutsu, A. Ali, C. Alt, C. Andreopoulos, L. Anthony, M. Antonova, S. Aoki, A. Ariga, Y. Ashida, E. T. Atkin, Y. Awataguchi, S. Ban, M. Barbi, G. J. Barker, G. Barr, C. Barry, M. Batkiewicz-Kwasniak, A. Beloshapkin, F. Bench, V. Berardi, S. Berkman, L. Berns, S. Bhadra, S. Bienstock, A. Blondel, S. Bolognesi, B. Bourguille, S. B. Boyd, D. Brailsford, A. Bravar, C. Bronner, M. Buizza Avanzini, J. Calcutt, T. Campbell, S. Cao, S. L. Cartwright, M. G. Catanesi, A. Cervera, A. Chappell, C. Checchia, D. Cherdack, N. Chikuma, G. Christodoulou, J. Coleman, G. Collazuol, L. Cook, D. Coplowe, A. Cudd, A. Dabrowska, G. De Rosa, T. Dealtry, P. F. Denner, S. R. Dennis, C. Densham, F. Di Lodovico, N. Dokania, S. Dolan, O. Drapier, J. Dumarchez, P. Dunne, L. Eklund, S. Emery-Schrenk, A. Ereditato, P. Fernandez, T. Feusels, A. J. Finch, G. A. Fiorentini, G. Fiorillo, C. Francois, M. Friend, Y. Fujii, R. Fujita, D. Fukuda, R. Fukuda, Y. Fukuda, K. Gameil, C. Giganti, T. Golan, M. Gonin, A. Gorin, M. Guigue, D. R. Hadley, J. T. Haigh, P. Hamacher-Baumann, M. Hartz, T. Hasegawa, N. C. Hastings, T. Hayashino, Y. Hayato, A. Hiramoto, M. Hogan, J. Holeczek, N. T. Hong Van, F. Iacob, A. K. Ichikawa, M. Ikeda, T. Ishida, T. Ishii, M. Ishitsuka, K. Iwamoto, A. Izmaylov, B. Jamieson, S. J. Jenkins, C. Jesús-Valls, M. Jiang, S. Johnson, P. Jonsson, C. K. Jung, M. Kabirnezhad, A. C. Kaboth, T. Kajita, H. Kakuno, J. Kameda, D. Karlen, Y. Kataoka, T. Katori, Y. Kato, E. Kearns, M. Khabibullin, A. Khotjantsev, H. Kim, J. Kim, S. King, J. Kisiel, A. Knight, A. Knox, T. Kobayashi, L. Koch, T. Koga, A. Konaka, L. L. Kormos, Y. Koshio, K. Kowalik, H. Kubo, Y. Kudenko, N. Kukita, R. Kurjata, T. Kutter, M. Kuze, L. Labarga, J. Lagoda, M. Lamoureux, M. Laveder, M. Lawe, M. Licciardi, T. Lindner, R. P. Litchfield, S. L. Liu, X. Li, A. Longhin, L. Ludovici, X. Lu, T. Lux, L. Magaletti, K. Mahn, M. Malek, S. Manly, L. Maret, A. D. Marino, J. F. Martin, T. Maruyama, T. Matsubara, K. Matsushita, V. Matveev, K. Mavrokoridis, E. Mazzucato, M. McCarthy, N. McCauley, K. S. McFarland, C. McGrew, A. Mefodiev, C. Metelko, M. Mezzetto, A. Minamino, O. Mineev, S. Mine, M. Miura, L. Molina Bueno, S. Moriyama, J. Morrison, Th. A. Mueller, L. Munteanu, S. Murphy, Y. Nagai, T. Nakadaira, M. Nakahata, Y. Nakajima, A. Nakamura, K. G. Nakamura, K. Nakamura, S. Nakayama, T. Nakaya, K. Nakayoshi, C. Nantais, T. V. Ngoc, K. Niewczas, K. Nishikawa, Y. Nishimura, T. S. Nonnenmacher, F. Nova, P. Novella, J. Nowak, J. C. Nugent, H. M. O’Keeffe, L. O’Sullivan, K. Okumura, T. Okusawa, S. M. Oser, R. A. Owen, Y. Oyama, V. Palladino, J. L. Palomino, V. Paolone, W. C. Parker, P. Paudyal, M. Pavin, D. Payne, G. C. Penn, L. Pickering, C. Pidcott, E. S. Pinzon Guerra, C. Pistillo, B. Popov, K. Porwit, M. Posiadala-Zezula, A. Pritchard, B. Quilain, T. Radermacher, E. Radicioni, B. Radics, P. N. Ratoff, E. Reinherz-Aronis, C. Riccio, E. Rondio, S. Roth, A. Rubbia, A. C. Ruggeri, A. Rychter, K. Sakashita, F. Sánchez, C. M. Schloesser, K. Scholberg, J. Schwehr, M. Scott, Y. Seiya, T. Sekiguchi, H. Sekiya, D. Sgalaberna, R. Shah, A. Shaikhiev, F. Shaker, A. Shaykina, M. Shiozawa, W. Shorrock, A. Shvartsman, A. Smirnov, M. Smy, J. T. Sobczyk, H. Sobel, F. J. P. Soler, Y. Sonoda, J. Steinmann, S. Suvorov, A. Suzuki, S. Y. Suzuki, Y. Suzuki, A. A. Sztuc, M. Tada, A. Takeda, Y. Takeuchi, H. K. Tanaka, H. A. Tanaka, S. Tanaka, L. F. Thompson, W. Toki, C. Touramanis, K. M. Tsui, T. Tsukamoto, M. Tzanov, Y. Uchida, W. Uno, M. Vagins, S. Valder, Z. Vallari, D. Vargas, G. Vasseur, C. Vilela, W. G. S. Vinning, T. Vladisavljevic, V. V. Volkov, T. Wachala, J. Walker, J. G. Walsh, Y. Wang, D. Wark, M. O. Wascko, A. Weber, R. Wendell, M. J. Wilking, C. Wilkinson, J. R. Wilson, R. J. Wilson, K. Wood, C. Wret, Y. Yamada, K. Yamamoto, C. Yanagisawa, G. Yang, T. Yano, K. Yasutome, S. Yen, N. Yershov, M. Yokoyama, T. Yoshida, M. Yu, A. Zalewska, J. Zalipska, K. Zaremba, G. Zarnecki, M. Ziembicki, E. D. Zimmerman, M. Zito, S. Zsoldos, A. Zykova

    This paper reports the first differential measurement of the charged-current (nu) over bar (mu) interaction cross section on water with no pions in the final state. The unfolded flux-averaged measurement using the T2K off-axis near detector is given in double-differential bins of mu(+) momentum and angle. The integrated cross section in a restricted phase space is sigma = (1.11 +/- 0.18) x 10(-38) cm(2) per water molecule. Comparisons with several nuclear models are also presented.

    American Physical Society (APS), 2020年07月21日, Physical Review D, 102 (1), 英語

    研究論文(学術雑誌)

  • K. Abe, N. Akhlaq, R. Akutsu, A. Ali, C. Alt, C. Andreopoulos, L. Anthony, M. Antonova, S. Aoki, A. Ariga, T. Arihara, Y. Asada, Y. Ashida, E. T. Atkin, Y. Awataguchi, S. Ban, M. Barbi, G. J. Barker, G. Barr, D. Barrow, M. Batkiewicz-Kwasniak, A. Beloshapkin, F. Bench, V. Berardi, L. Berns, S. Bhadra, S. Bienstock, S. Bolognesi, T. Bonus, B. Bourguille, S. B. Boyd, A. Bravar, D. Bravo Berguño, C. Bronner, S. Bron, A. Bubak, M. Buizza Avanzini, T. Campbell, S. Cao, S. L. Cartwright, M. G. Catanesi, A. Cervera, D. Cherdack, N. Chikuma, G. Christodoulou, M. Cicerchia, J. Coleman, G. Collazuol, L. Cook, D. Coplowe, A. Cudd, A. Dabrowska, G. De Rosa, T. Dealtry, S. R. Dennis, C. Densham, F. Di Lodovico, N. Dokania, S. Dolan, T. A. Doyle, O. Drapier, J. Dumarchez, P. Dunne, A. Eguchi, L. Eklund, S. Emery-Schrenk, A. Ereditato, A. J. Finch, G. Fiorillo, C. Francois, M. Friend, Y. Fujii, R. Fujita, D. Fukuda, R. Fukuda, Y. Fukuda, K. Fusshoeller, C. Giganti, M. Gonin, A. Gorin, M. Guigue, D. R. Hadley, J. T. Haigh, P. Hamacher-Baumann, M. Hartz, T. Hasegawa, S. Hassani, N. C. Hastings, Y. Hayato, A. Hiramoto, M. Hogan, J. Holeczek, N. T. Hong Van, T. Honjo, F. Iacob, A. K. Ichikawa, M. Ikeda, T. Ishida, M. Ishitsuka, K. Iwamoto, A. Izmaylov, N. Izumi, M. Jakkapu, B. Jamieson, S. J. Jenkins, C. Jesús-Valls, M. Jiang, P. Jonsson, C. K. Jung, X. Junjie, P. B. Jurj, M. Kabirnezhad, A. C. Kaboth, T. Kajita, H. Kakuno, J. Kameda, D. Karlen, S. P. Kasetti, Y. Kataoka, Y. Katayama, T. Katori, Y. Kato, E. Kearns, M. Khabibullin, A. Khotjantsev, T. Kikawa, H. Kikutani, H. Kim, S. King, J. Kisiel, A. Knight, T. Kobata, T. Kobayashi, L. Koch, T. Koga, A. Konaka, L. L. Kormos, Y. Koshio, A. Kostin, K. Kowalik, H. Kubo, Y. Kudenko, N. Kukita, S. Kuribayashi, R. Kurjata, T. Kutter, M. Kuze, L. Labarga, J. Lagoda, M. Lamoureux, D. Last, M. Lawe, M. Licciardi, R. P. Litchfield, S. L. Liu, X. Li, A. Longhin, L. Ludovici, X. Lu, T. Lux, L. N. Machado, L. Magaletti, K. Mahn, M. Malek, S. Manly, L. Maret, A. D. Marino, L. Marti-Magro, T. Maruyama, T. Matsubara, K. Matsushita, V. Matveev, C. Mauger, K. Mavrokoridis, E. Mazzucato, N. McCauley, J. McElwee, K. S. McFarland, C. McGrew, A. Mefodiev, C. Metelko, M. Mezzetto, A. Minamino, O. Mineev, S. Mine, M. Miura, L. Molina Bueno, S. Moriyama, Th. A. Mueller, L. Munteanu, S. Murphy, Y. Nagai, T. Nakadaira, M. Nakahata, Y. Nakajima, A. Nakamura, K. Nakamura, S. Nakayama, T. Nakaya, K. Nakayoshi, C. E. R. Naseby, T. V. Ngoc, K. Niewczas, K. Nishikawa, Y. Nishimura, E. Noah, T. S. Nonnenmacher, F. Nova, P. Novella, J. Nowak, J. C. Nugent, H. M. O’Keeffe, L. O’Sullivan, T. Odagawa, T. Ogawa, R. Okada, K. Okumura, T. Okusawa, S. M. Oser, R. A. Owen, Y. Oyama, V. Palladino, V. Paolone, M. Pari, W. C. Parker, S. Parsa, J. Pasternak, M. Pavin, D. Payne, G. C. Penn, L. Pickering, C. Pidcott, G. Pintaudi, C. Pistillo, B. Popov, K. Porwit, M. Posiadala-Zezula, A. Pritchard, B. Quilain, T. Radermacher, E. Radicioni, B. Radics, P. N. Ratoff, C. Riccio, E. Rondio, S. Roth, A. Rubbia, A. C. Ruggeri, C. Ruggles, A. Rychter, K. Sakashita, F. Sánchez, G. Santucci, C. M. Schloesser, K. Scholberg, M. Scott, Y. Seiya, T. Sekiguchi, H. Sekiya, D. Sgalaberna, A. Shaikhiev, A. Shaykina, M. Shiozawa, W. Shorrock, A. Shvartsman, M. Smy, J. T. Sobczyk, H. Sobel, F. J. P. Soler, Y. Sonoda, S. Suvorov, A. Suzuki, S. Y. Suzuki, Y. Suzuki, A. A. Sztuc, M. Tada, M. Tajima, A. Takeda, Y. Takeuchi, H. K. Tanaka, H. A. Tanaka, S. Tanaka, Y. Tanihara, N. Teshima, L. F. Thompson, W. Toki, C. Touramanis, T. Towstego, K. M. Tsui, T. Tsukamoto, M. Tzanov, Y. Uchida, M. Vagins, S. Valder, Z. Vallari, D. Vargas, G. Vasseur, W. G. S. Vinning, T. Vladisavljevic, V. V. Volkov, T. Wachala, J. Walker, J. G. Walsh, Y. Wang, D. Wark, M. O. Wascko, A. Weber, R. Wendell, M. J. Wilking, C. Wilkinson, J. R. Wilson, K. Wood, C. Wret, K. Yamamoto, C. Yanagisawa, G. Yang, T. Yano, K. Yasutome, N. Yershov, M. Yokoyama, T. Yoshida, M. Yu, A. Zalewska, J. Zalipska, K. Zaremba, G. Zarnecki, M. Ziembicki, E. D. Zimmerman, M. Zito, S. Zsoldos, A. Zykova

    This paper reports the first simultaneous measurement of the double differential muon neutrino chargedcurrent cross section on oxygen and carbon without pions in the final state as a function of the outgoing muon kinematics, made at the ND280 off-axis near detector of the T2K experiment. The ratio of the oxygen and carbon cross sections is also provided to help validate various models' ability to extrapolate between carbon and oxygen nuclear targets, as is required in T2K oscillation analyses. The data are taken using a neutrino beam with an energy spectrum peaked at 0.6 GeV. The extracted measurement is compared with the prediction from different Monte Carlo neutrino-nucleus interaction event generators, showing particular model separation for very forward-going muons. Overall, of the models tested, the result is best described using local Fermi gas descriptions of the nuclear ground state with RPA suppression.

    American Physical Society (APS), 2020年06月16日, Physical Review D, 101 (11), 英語

    研究論文(学術雑誌)

  • K. Abe, N. Akhlaq, R. Akutsu, A. Ali, C. Alt, C. Andreopoulos, L. Anthony, M. Antonova, S. Aoki, A. Ariga, T. Arihara, Y. Asada, Y. Ashida, E. T. Atkin, Y. Awataguchi, S. Ban, M. Barbi, G. J. Barker, G. Barr, D. Barrow, C. Barry, M. Batkiewicz-Kwasniak, A. Beloshapkin, F. Bench, V. Berardi, L. Berns, S. Bhadra, S. Bienstock, A. Blondel, S. Bolognesi, T. Bonus, B. Bourguille, S. B. Boyd, D. Brailsford, A. Bravar, D. Bravo Berguño, C. Bronner, S. Bron, A. Bubak, M. Buizza Avanzini, J. Calcutt, T. Campbell, S. Cao, S. L. Cartwright, M. G. Catanesi, A. Cervera, A. Chappell, C. Checchia, D. Cherdack, N. Chikuma, G. Christodoulou, M. Cicerchia, J. Coleman, G. Collazuol, L. Cook, D. Coplowe, A. Cudd, A. Dabrowska, G. De Rosa, T. Dealtry, P. F. Denner, S. R. Dennis, C. Densham, F. Di Lodovico, N. Dokania, S. Dolan, T. A. Doyle, O. Drapier, J. Dumarchez, P. Dunne, A. Eguchi, L. Eklund, S. Emery-Schrenk, A. Ereditato, P. Fernandez, T. Feusels, A. J. Finch, G. A. Fiorentini, G. Fiorillo, C. Francois, M. Friend, Y. Fujii, R. Fujita, D. Fukuda, R. Fukuda, Y. Fukuda, K. Fusshoeller, C. Giganti, T. Golan, M. Gonin, A. Gorin, M. Guigue, D. R. Hadley, J. T. Haigh, P. Hamacher-Baumann, M. Hartz, T. Hasegawa, S. Hassani, N. C. Hastings, T. Hayashino, Y. Hayato, A. Hiramoto, M. Hogan, J. Holeczek, N. T. Hong Van, T. Honjo, F. Iacob, A. K. Ichikawa, M. Ikeda, T. Ishida, T. Ishii, M. Ishitsuka, K. Iwamoto, A. Izmaylov, N. Izumi, M. Jakkapu, B. Jamieson, S. J. Jenkins, C. Jesús-Valls, M. Jiang, S. Johnson, P. Jonsson, C. K. Jung, X. Junjie, P. B. Jurj, M. Kabirnezhad, A. C. Kaboth, T. Kajita, H. Kakuno, J. Kameda, D. Karlen, S. P. Kasetti, Y. Kataoka, Y. Katayama, T. Katori, Y. Kato, E. Kearns, M. Khabibullin, A. Khotjantsev, T. Kikawa, H. Kikutani, H. Kim, S. King, J. Kisiel, A. Knight, A. Knox, T. Kobata, T. Kobayashi, L. Koch, T. Koga, A. Konaka, L. L. Kormos, Y. Koshio, A. Kostin, K. Kowalik, H. Kubo, Y. Kudenko, N. Kukita, S. Kuribayashi, R. Kurjata, T. Kutter, M. Kuze, L. Labarga, J. Lagoda, M. Lamoureux, D. Last, M. Laveder, M. Lawe, M. Licciardi, T. Lindner, R. P. Litchfield, S. L. Liu, X. Li, A. Longhin, L. Ludovici, X. Lu, T. Lux, L. N. Machado, L. Magaletti, K. Mahn, M. Malek, S. Manly, L. Maret, A. D. Marino, L. Marti-Magro, J. F. Martin, T. Maruyama, T. Matsubara, K. Matsushita, V. Matveev, C. Mauger, K. Mavrokoridis, E. Mazzucato, M. McCarthy, N. McCauley, J. McElwee, K. S. McFarland, C. McGrew, A. Mefodiev, C. Metelko, M. Mezzetto, A. Minamino, O. Mineev, S. Mine, M. Miura, L. Molina Bueno, S. Moriyama, J. Morrison, Th.A. Mueller, L. Munteanu, S. Murphy, Y. Nagai, T. Nakadaira, M. Nakahata, Y. Nakajima, A. Nakamura, K. G. Nakamura, K. Nakamura, S. Nakayama, T. Nakaya, K. Nakayoshi, C. Nantais, C. E. R. Naseby, T. V. Ngoc, K. Niewczas, K. Nishikawa, Y. Nishimura, T. S. Nonnenmacher, F. Nova, P. Novella, J. Nowak, J. C. Nugent, H. M. O’Keeffe, L. O’Sullivan, T. Odagawa, T. Ogawa, R. Okada, K. Okumura, T. Okusawa, S. M. Oser, R. A. Owen, Y. Oyama, V. Palladino, J. L. Palomino, V. Paolone, W. C. Parker, S. Parsa, J. Pasternak, P. Paudyal, M. Pavin, D. Payne, G. C. Penn, L. Pickering, C. Pidcott, G. Pintaudi, E. S. Pinzon Guerra, C. Pistillo, B. Popov, K. Porwit, M. Posiadala-Zezula, A. Pritchard, B. Quilain, T. Radermacher, E. Radicioni, B. Radics, P. N. Ratoff, E. Reinherz-Aronis, C. Riccio, E. Rondio, S. Roth, A. Rubbia, A. C. Ruggeri, C. Ruggles, A. Rychter, K. Sakashita, F. Sánchez, G. Santucci, C. M. Schloesser, K. Scholberg, J. Schwehr, M. Scott, Y. Seiya, T. Sekiguchi, H. Sekiya, D. Sgalaberna, R. Shah, A. Shaikhiev, F. Shaker, A. Shaykina, M. Shiozawa, W. Shorrock, A. Shvartsman, A. Smirnov, M. Smy, J. T. Sobczyk, H. Sobel, F. J. P. Soler, Y. Sonoda, J. Steinmann, S. Suvorov, A. Suzuki, S. Y. Suzuki, Y. Suzuki, A. A. Sztuc, M. Tada, M. Tajima, A. Takeda, Y. Takeuchi, H. K. Tanaka, H. A. Tanaka, S. Tanaka, Y. Tanihara, N. Teshima, L. F. Thompson, W. Toki, C. Touramanis, T. Towstego, K. M. Tsui, T. Tsukamoto, M. Tzanov, Y. Uchida, M. Vagins, S. Valder, Z. Vallari, D. Vargas, G. Vasseur, C. Vilela, W. G. S. Vinning, T. Vladisavljevic, V. V. Volkov, T. Wachala, J. Walker, J. G. Walsh, Y. Wang, D. Wark, M. O. Wascko, A. Weber, R. Wendell, M. J. Wilking, C. Wilkinson, J. R. Wilson, R. J. Wilson, K. Wood, C. Wret, Y. Yamada, K. Yamamoto, C. Yanagisawa, G. Yang, T. Yano, K. Yasutome, S. Yen, N. Yershov, M. Yokoyama, T. Yoshida, M. Yu, A. Zalewska, J. Zalipska, K. Zaremba, G. Zarnecki, M. Ziembicki, E. D. Zimmerman, M. Zito, S. Zsoldos, A. Zykova

    This paper presents the first combined measurement of the double-differential muon neutrino and antineutrino charged-current cross sections with no pions in the final state on hydrocarbon at the off-axis near detector of the T2K experiment. The data analyzed in this work comprise 5.8 x 10(20) and 6.3 x 10(20) protons on target in neutrino and antineutrino mode respectively, at a beam energy peak of 0.6 GeV. Using the two measured cross sections, the sum, difference, and asymmetry were calculated with the aim of better understanding the nuclear effects involved in such interactions. The extracted measurements have been compared with the prediction from different Monte Carlo generators and theoretical models showing that the difference between the two cross sections have interesting sensitivity to nuclear effects.

    American Physical Society (APS), 2020年06月02日, Physical Review D, 101 (11), 英語

    研究論文(学術雑誌)

  • K. Abe, R. Akutsu, A. Ali, C. Alt, C. Andreopoulos, L. Anthony, M. Antonova, S. Aoki, A. Ariga, Y. Asada, Y. Ashida, E. T. Atkin, Y. Awataguchi, S. Ban, M. Barbi, G. J. Barker, G. Barr, D. Barrow, C. Barry, M. Batkiewicz-Kwasniak, A. Beloshapkin, F. Bench, V. Berardi, S. Berkman, L. Berns, S. Bhadra, S. Bienstock, A. Blondel, S. Bolognesi, B. Bourguille, S. B. Boyd, D. Brailsford, A. Bravar, D. Bravo Berguño, C. Bronner, A. Bubak, M. Buizza Avanzini, J. Calcutt, T. Campbell, S. Cao, S. L. Cartwright, M. G. Catanesi, A. Cervera, A. Chappell, C. Checchia, D. Cherdack, N. Chikuma, G. Christodoulou, J. Coleman, G. Collazuol, L. Cook, D. Coplowe, A. Cudd, A. Dabrowska, G. De Rosa, T. Dealtry, P. F. Denner, S. R. Dennis, C. Densham, F. Di Lodovico, N. Dokania, S. Dolan, T. A. Doyle, O. Drapier, J. Dumarchez, P. Dunne, L. Eklund, S. Emery-Schrenk, A. Ereditato, P. Fernandez, T. Feusels, A. J. Finch, G. A. Fiorentini, G. Fiorillo, C. Francois, M. Friend, Y. Fujii, R. Fujita, D. Fukuda, R. Fukuda, Y. Fukuda, K. Fusshoeller, K. Gameil, C. Giganti, T. Golan, M. Gonin, A. Gorin, M. Guigue, D. R. Hadley, J. T. Haigh, P. Hamacher-Baumann, M. Hartz, T. Hasegawa, N. C. Hastings, T. Hayashino, Y. Hayato, A. Hiramoto, M. Hogan, J. Holeczek, N. T. Hong Van, F. Iacob, A. K. Ichikawa, M. Ikeda, T. Ishida, T. Ishii, M. Ishitsuka, K. Iwamoto, A. Izmaylov, M. Jakkapu, B. Jamieson, S. J. Jenkins, C. Jesús-Valls, M. Jiang, S. Johnson, P. Jonsson, C. K. Jung, M. Kabirnezhad, A. C. Kaboth, T. Kajita, H. Kakuno, J. Kameda, D. Karlen, S. P. Kasetti, Y. Kataoka, T. Katori, Y. Kato, E. Kearns, M. Khabibullin, A. Khotjantsev, T. Kikawa, H. Kim, J. Kim, S. King, J. Kisiel, A. Knight, A. Knox, T. Kobayashi, L. Koch, T. Koga, A. Konaka, L. L. Kormos, Y. Koshio, A. Kostin, K. Kowalik, H. Kubo, Y. Kudenko, N. Kukita, S. Kuribayashi, R. Kurjata, T. Kutter, M. Kuze, L. Labarga, J. Lagoda, M. Lamoureux, M. Laveder, M. Lawe, M. Licciardi, T. Lindner, R. P. Litchfield, S. L. Liu, X. Li, A. Longhin, L. Ludovici, X. Lu, T. Lux, L. N. Machado, L. Magaletti, K. Mahn, M. Malek, S. Manly, L. Maret, A. D. Marino, L. Marti-Magro, J. F. Martin, T. Maruyama, T. Matsubara, K. Matsushita, V. Matveev, K. Mavrokoridis, E. Mazzucato, M. McCarthy, N. McCauley, K. S. McFarland, C. McGrew, A. Mefodiev, C. Metelko, M. Mezzetto, A. Minamino, O. Mineev, S. Mine, M. Miura, L. Molina Bueno, S. Moriyama, J. Morrison, Th. A. Mueller, L. Munteanu, S. Murphy, Y. Nagai, T. Nakadaira, M. Nakahata, Y. Nakajima, A. Nakamura, K. G. Nakamura, K. Nakamura, S. Nakayama, T. Nakaya, K. Nakayoshi, C. Nantais, T. V. Ngoc, K. Niewczas, K. Nishikawa, Y. Nishimura, T. S. Nonnenmacher, F. Nova, P. Novella, J. Nowak, J. C. Nugent, H. M. O’Keeffe, L. O’Sullivan, T. Odagawa, K. Okumura, T. Okusawa, S. M. Oser, R. A. Owen, Y. Oyama, V. Palladino, J. L. Palomino, V. Paolone, W. C. Parker, J. Pasternak, P. Paudyal, M. Pavin, D. Payne, G. C. Penn, L. Pickering, C. Pidcott, G. Pintaudi, E. S. Pinzon Guerra, C. Pistillo, B. Popov, K. Porwit, M. Posiadala-Zezula, A. Pritchard, B. Quilain, T. Radermacher, E. Radicioni, B. Radics, P. N. Ratoff, E. Reinherz-Aronis, C. Riccio, E. Rondio, S. Roth, A. Rubbia, A. C. Ruggeri, C. A. Ruggles, A. Rychter, K. Sakashita, F. Sánchez, C. M. Schloesser, K. Scholberg, J. Schwehr, M. Scott, Y. Seiya, T. Sekiguchi, H. Sekiya, D. Sgalaberna, R. Shah, A. Shaikhiev, F. Shaker, A. Shaykina, M. Shiozawa, W. Shorrock, A. Shvartsman, A. Smirnov, M. Smy, J. T. Sobczyk, H. Sobel, F. J. P. Soler, Y. Sonoda, J. Steinmann, S. Suvorov, A. Suzuki, S. Y. Suzuki, Y. Suzuki, A. A. Sztuc, M. Tada, M. Tajima, A. Takeda, Y. Takeuchi, H. K. Tanaka, H. A. Tanaka, S. Tanaka, L. F. Thompson, W. Toki, C. Touramanis, T. Towstego, K. M. Tsui, T. Tsukamoto, M. Tzanov, Y. Uchida, W. Uno, M. Vagins, S. Valder, Z. Vallari, D. Vargas, G. Vasseur, C. Vilela, W. G. S. Vinning, T. Vladisavljevic, V. V. Volkov, T. Wachala, J. Walker, J. G. Walsh, Y. Wang, D. Wark, M. O. Wascko, A. Weber, R. Wendell, M. J. Wilking, C. Wilkinson, J. R. Wilson, R. J. Wilson, K. Wood, C. Wret, Y. Yamada, K. Yamamoto, C. Yanagisawa, G. Yang, T. Yano, K. Yasutome, S. Yen, N. Yershov, M. Yokoyama, T. Yoshida, M. Yu, A. Zalewska, J. Zalipska, K. Zaremba, G. Zarnecki, M. Ziembicki, E. D. Zimmerman, M. Zito, S. Zsoldos, A. Zykova

    Electron antineutrino appearance is measured by the T2K experiment in an accelerator-produced antineutrino beam, using additional neutrino beam operation to constrain parameters of the Pontecorvo-Maki-Nakagawa-Sakata (PMNS) mixing matrix. T2K observes 15 candidate electron antineutrino events with a background expectation of 9.3 events. Including information from the kinematic distribution of observed events, the hypothesis of no electron antineutrino appearance is disfavored with a significance of 2.40s and no discrepancy between data and PMNS predictions is found. A complementary analysis that introduces an additional free parameter which allows non-PMNS values of electron neutrino and antineutrino appearance also finds no discrepancy between data and PMNS predictions.

    American Physical Society (APS), 2020年04月21日, Physical Review Letters, 124 (16), 英語

    研究論文(学術雑誌)

  • K. Abe et al.

    The charge-conjugation and parity-reversal (CP) symmetry of fundamental particles is a symmetry between matter and antimatter. Violation of this CP symmetry was first observed in 1964(1), and CP violation in the weak interactions of quarks was soon established(2). Sakharov proposed(3) that CP violation is necessary to explain the observed imbalance of matter and antimatter abundance in the Universe. However, CP violation in quarks is too small to support this explanation. So far, CP violation has not been observed in non-quark elementary particle systems. It has been shown that CP violation in leptons could generate the matter-antimatter disparity through a process called leptogenesis(4). Leptonic mixing, which appears in the standard model's charged current interactions(5,6), provides a potential source of CP violation through a complex phase dCP, which is required by some theoretical models of leptogenesis(7-9). This CP violation can be measured in muon neutrino to electron neutrino oscillations and the corresponding antineutrino oscillations, which are experimentally accessible using accelerator-produced beams as established by the Tokai-to-Kamioka (T2K) and NOvA experiments(10,11). Until now, the value of dCP has not been substantially constrained by neutrino oscillation experiments. Here we report a measurement using long-baseline neutrino and antineutrino oscillations observed by the T2K experiment that shows a large increase in the neutrino oscillation probability, excluding values of dCP that result in a large increase in the observed antineutrino oscillation probability at three standard deviations (3 sigma). The 3 sigma confidence interval for delta(CP), which is cyclic and repeats every 2p, is [-3.41, -0.03] for the so-called normal mass ordering and [-2.54, -0.32] for the inverted mass ordering. Our results indicate CP violation in leptons and our method enables sensitive searches for matter-antimatter asymmetry in neutrino oscillations using accelerator-produced neutrino beams. Future measurements with larger datasets will test whether leptonic CP violation is larger than the CP violation in quarks.

    NATURE PUBLISHING GROUP, 2020年04月15日, Nature, 580 (7803), 339 - 344, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Measurement of the muon flux from 400 GeV/c protons interacting in a thick molybdenum/tungsten target

    C. Ahdida et al.

    2020年03月29日, Eur. Phys. J. C, 80 (3), 284

    [査読有り]

  • Abe, K., Akutsu, R., Ali, A., Alt, C., Amey, J., Andreopoulos, C., Anthony, L., Antonova, M., Aoki, S., Ariga, A., Ashida, Y., Atkin, E.T., Awataguchi, Y., Azuma, Y., Ban, S., Barbi, M., Barker, G.J., Barr, G., Barry, C., Batkiewicz-Kwasniak, M., Beloshapkin, A., Bench, F., Berardi, V., Berkman, S., Berner, R.M., Berns, L., Bhadra, S., Bienstock, S., Blondel, A., Bolognesi, S., Bordoni, S., Bourguille, B., Boyd, S.B., Brailsford, D., Bravar, A., Bronner, C., Buizza Avanzini, M., Calcutt, J., Calland, R.G., Campbell, T., Cao, S., Cartwright, S.L., Castillo, R., Catanesi, M.G., Cervera, A., Chappell, A., Checchia, C., Cherdack, D., Chikuma, N., Christodoulou, G., Coleman, J., Collazuol, G., Coplowe, L.Cook$^{INSTGG$^{INSTHA}$D., Cudd, A., Dabrowska, A., De Rosa, G., Dealtry, T., Denner, P.F., Dennis, S.R., Densham, C., Di Lodovico, F., Dokania, N., Dolan, S., Drapier, O., Duffy, K.E., Dumarchez, J., Dunne, P., Eklund, L., Emery-Schrenk, S., Ereditato, A., Fernandez, P., Feusels, T., Finch, A.J., Fiorentini, G.A., Fiorillo, G., Francois, C., Friend, M., Fujii, Y., Fujita, R., Fukuda, D., Fukuda, R., Fukuda, Y., Gameil, K., Garcia, A., Giganti, C., Gizzarelli, F., Golan, T., Gonin, M., Gorin, A., Guigue, M., Hadley, D.R., Haegel, L., Haigh, J.T., Hamacher-Baumann, P., Hansen, D., Harada, J., Hartz, M., Hasegawa, T., Hastings, N.C., Hayashino, T., Hayato, Y., Hillairet, A., Hiraki, T., Hiramoto, A., Hirota, S., Hogan, M., J.Holeczek$^{INSTDIN.T.Hong Van$^{INSTHH, INSTHI}$F.Hosomi, Huang, K., Iacob, F., Ichikawa, A.K., Ikeda, M., Imber, J., Inoue, T., Insler, J., Intonti, R.A., Ishida, T., Ishii, T., Ishitsuka, M., Iwai, E., Iwamoto, K., Izmaylov, A., Jamieson, B., Jenkins, S.J., Jesús-Valls, C., Jiang, M., Johnson, S., Jonsson, P., Jung, C.K., Kabirnezhad, M., Kaboth, A.C., Kajita, T., Kakuno, H., Kameda, J., Karlen, D., Kataoka, Y., Katori, T., Kato, Y., Khabibullin, E.Kearns$^{INSTFE$^{INSTHA}$M., Khotjantsev, A., Kim, H., Kim, J., King, S., Kisiel, J., Knight, A., Knox, A., Kobayashi, T., Koch, L., Koga, T., Koller, P.P., Konaka, A., Kormos, L.L., Koshio, Y., Kowalik, K., Kubo, H., Kudenko, Y., Kukita, N., Kurjata, R., Kutter, T., Kuze, M., Labarga, L., Lagoda, J., Lamont, I., Lamoureux, M., Lasorak, P., Laveder, M., Lawe, M., Licciardi, M., Lindner, T., Liptak, Z.J., Litchfield, R.P., Liu, S.L., Li, X., Longhin, A., Lopez, J.P., Lou, T., Ludovici, L., Lu, X., Lux, T., Machado, L.N., Magaletti, L., Mahn, K., Malek, M., Manly, S., Maret, L., Marino, A.D., Martin, J.F., Martins, P., Martynenko, S., Maruyama, T., Matsubara, T., Matsushita, K., Matveev, V., Mavrokoridis, K., Ma, W.Y., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K.S., McGrew, C., Mefodiev, A., Metelko, C., Mezzetto, M., Minamino, A., Mineev, O., Mine, S., Missert, A., Miura, M., Molina Bueno, L., Moriyama, S., Morrison, J., Mueller, Th.A., Munteanu, L., Murphy, S., Nagai, Y., Nakadaira, T., Nakahata, M., Nakajima, Y., Nakamura, A., Nakamura, K.G., Nakamura, K., Nakamura, K.D., Nakanishi, Y., Nakayoshi, S.Nakayama$^{INSTBJ$^{INSTHA}$T.Nakaya$^{INSTCD$^{INSTHA}$K., Nantais, C., Ngoc, T.V., Nielsen, C., Niewczas, K., Nishikawa, K., Nishimura, Y., Nonnenmacher, T.S., Nova, F., Novella, P., Nowak, J., Nugent, J.C., O'Keeffe, H.M., O'Sullivan, L., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S.M., Ovsyannikova, T., Owen, R.A., Oyama, Y., Palladino, V., Palomino, J.L., Paolone, V., Parker, W.C., Patel, N.D., Paudyal, P., Pavin, M., Payne, D., Penn, G.C., Petrov, Y., Pickering, L., Pidcott, C., Pinzon Guerra, E.S., Pistillo, C., Popov, B., Porwit, K., Posiadala-Zezula, M., Poutissou, J.-M., Pritchard, A., Przewlocki, P., Quilain, B., Radermacher, T., Radicioni, E., Radics, B., Ratoff, P.N., Rayner, M.A., Reinherz-Aronis, E., Riccio, C., Rondio, E., Rossi, B., Roth, S., Rubbia, A., Ruggeri, A.C., Rychter, A., Sakashita, K., Sánchez, F., Sasaki, S., Scantamburlo, E., Schloesser, C.M., Scholberg, K., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shah, R., Shaikhiev, A., Shaker, F., Shaw, D., Shaykina, A., Shiozawa, M., Shirahige, T., Shorrock, W., Shvartsman, A., Smirnov, A., Smy, M., Sobczyk, J.T., Sobel, H., Soler, F.J.P., Sonoda, Y., Steinmann, J., Stewart, T., Stowell, P., Suda, Y., Suvorov, S., Suzuki, A., Suzuki, S.Y., Suzuki, Y., Sztuc, A.A., Tada, R.Tacik$^{INSTE$^{INSTB}$M., Takeda, A., Takeuchi, Y., Tamura, R., Tanaka, H.K., Tanaka, H.A.Tanaka$^{INSTIA$^{INSTF}$S., Thakore, T., Thompson, L.F., Tobayama, S., Toki, W., Tomura, T., Touramanis, C., Tsui, K.M., Tsukamoto, T., Tzanov, M., Uchida, Y., Uno, W., Vagins, M., Valder, S., Vallari, Z., Vargas, D., Vasseur, G., Vilela, C., Vinning, W.G.S., Vladisavljevic, T., Volkov, V.V., Wachala, T., Walker, J., Walsh, J.G., Walter, C.W., Wang, Y., Wark, D., Wascko, M.O., Weber, A., Wendell, R., Wilking, M.J., Wilkinson, C., Wilson, J.R., Wilson, R.J., Wood, K., Wret, C., Yamada, Y., Yamamoto, K., Yamasu, S., Yanagisawa, C., Yang, G., Yano, T., Yasutome, K., Yen, S., Yershov, N., Yokoyama, M., Yoshida, T., Yu, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Zarnecki, G., Ziembicki, M., Zimmerman, E.D., Zito, M., Zsoldos, S., Zykova, A.

    2020年01月21日, Phys.Rev.D, 101 (1), 012007 - 012007

    [査読有り]

    研究論文(学術雑誌)

  • Shigeki Aoki, Akitaka Ariga, Tomoko Ariga, Sergey Dmitrievsky, Elena Firu, Dean Forshaw, Tsutomu Fukuda, Yuri Gornushkin, Ali Murat Guler, Maria Haiduc, Koichi Kodama, Masahiro Komatsu, Muhtesem Akif Korkmaz, Umut Kose, Madalina Miloi, Antonio Miucci, Motoaki Miyanishi, Mitsuhiro Nakamura, Toshiyuki Nakano, Alina Neagu, Hiroki Rokujo, Osamu Sato, Elizaveta Sitnikova, Yosuke Suzuki, Tomoki Takao, Svetlana Vasina, Mykhailo Vladymyrov, Thomas Weston, Junya Yoshidaj, Masahiro Yoshimoto

    In the DsTau experiment at the CERN SPS (NA65), an independent and direct way to measure tau neutrino production following high energy proton interactions was proposed. As the main source of tau neutrinos is a decay of D-s mesons, produced in proton-nucleus interactions, the project aims at measuring a differential cross section of this reaction. The experimental method is based on a use of high resolution emulsion detectors for effective registration of events with short lived particle decays. Here we present the motivation of the study, details of the experimental technique, and the first results of the analysis of the data collected during test runs, which prove feasibility of the full scale study of the process in future.

    SPRINGER, 2020年01月07日, JOURNAL OF HIGH ENERGY PHYSICS, 2001 (1), 033, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe, K., Akutsu, R., Ali, A., Alt, C., Andreopoulos, C., Anthony, L., Antonova, M., Aoki, S., Ariga, A., Ashida, Y., Atkin, E.T., Awataguchi, Y., Ban, S., Barbi, M., Barker, G.J., Barr, G., Barry, C., Batkiewicz-Kwasniak, M., Beloshapkin, A., Bench, F., Berardi, V., Berkman, S., Berns, L., Bhadra, S., Bienstock, S., Blondel, A., Bolognesi, S., Bourguille, B., Boyd, S.B., Brailsford, D., Bravar, A., Bravo Berguño, D., Bronner, C., Bubak, A., Buizza Avanzini, M., Calcutt, J., Campbell, T., Cao, S., Cartwright, S.L., Catanesi, M.G., Cervera, A., Chappell, A., Checchia, C., Cherdack, D., Chikuma, N., Christodoulou, G., Coleman, J., Collazuol, G., Cook, L., Coplowe, D., Cudd, A., Dabrowska, A., De Rosa, G., Dealtry, T., Denner, P.F., Dennis, S.R., Densham, C., Di Lodovico, F., Dokania, N., Dolan, S., Drapier, O., Dumarchez, J., Dunne, P., Eklund, L., Emery-Schrenk, S., Ereditato, A., Fernandez, P., Feusels, T., Finch, A.J., Fiorentini, G.A., Fiorillo, G., Francois, C., Friend, M., Fujii, Y., Fujita, R., Fukuda, D., Fukuda, R., Fukuda, Y., Gameil, K., Giganti, C., Golan, T., Gonin, M., Gorin, A., Guigue, M., Hadley, D.R., Haigh, J.T., Hamacher-Baumann, P., Hartz, M., Hasegawa, T., Hastings, N.C., Hayashino, T., Hayato, Y., Hiramoto, A., Hogan, M., Holeczek, J., Hong Van, N.T., Iacob, F., Ichikawa, A.K., Ikeda, M., Ishida, T., Ishii, T., Ishitsuka, M., Iwamoto, K., Izmaylov, A., Jamieson, B., Jenkins, S.J., Jesús-Valls, C., Jiang, M., Johnson, S., Jonsson, P., Jung, C.K., Kabirnezhad, M., Kaboth, A.C., Kajita, T., Kakuno, H., Kameda, J., Karlen, D., Kasetti, S.P., Kataoka, Y., Katori, T., Kato, Y., Kearns, E., Khabibullin, M., Khotjantsev, A., Kikawa, T., Kim, H., Kim, J., King, S., Kisiel, J., Knight, A., Knox, A., Kobayashi, T., Koch, L., Koga, T., Konaka, A., Kormos, L.L., Koshio, Y., Kowalik, K., Kubo, H., Kudenko, Y., Kukita, N., Kuribayashi, S., Kurjata, R., Kutter, T., Kuze, M., Labarga, L., Lagoda, J., Lamoureux, M., Laveder, M., Lawe, M., Licciardi, M., Lindner, T., Litchfield, R.P., Liu, S.L., Li, X., Longhin, A., Ludovici, L., Lu, X., Lux, T., Machado, L.N., Magaletti, L., Mahn, K., Malek, M., Manly, S., Maret, L., Marino, A.D., Martin, J.F., Maruyama, T., Matsubara, T., Matsushita, K., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K.S., McGrew, C., Mefodiev, A., Metelko, C., Mezzetto, M., Minamino, A., Mineev, O., Mine, S., Miura, M., Molina Bueno, L., Moriyama, S., Morrison, J., Mueller, Th.A., Munteanu, L., Murphy, S., Nagai, Y., Nakadaira, T., Nakahata, M., Nakajima, Y., Nakamura, A., Nakamura, K.G., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Nantais, C., Ngoc, T.V., Niewczas, K., Nishikawa, K., Nishimura, Y., Nonnenmacher, T.S., Nova, F., Novella, P., Nowak, J., Nugent, J.C., O'Keeffe, H.M., O'Sullivan, L., Odagawa, T., Okumura, K., Okusawa, T., Oser, S.M., Owen, R.A., Oyama, Y., Palladino, V., Palomino, J.L., Paolone, V., Parker, W.C., Paudyal, P., Pavin, M., Payne, D., Penn, G.C., Pickering, L., Pidcott, C., Pinzon Guerra, E.S., Pistillo, C., Popov, B., Porwit, K., Posiadala-Zezula, M., Pritchard, A., Quilain, B., Radermacher, T., Radicioni, E., Radics, B., Ratoff, P.N., Reinherz-Aronis, E., Riccio, C., Rondio, E., Roth, S., Rubbia, A., Ruggeri, A.C., Rychter, A., Sakashita, K., Sánchez, F., Schloesser, C.M., Scholberg, K., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shah, R., Shaikhiev, A., Shaker, F., Shaykina, A., Shiozawa, M., Shorrock, W., Shvartsman, A., Smirnov, A., Smy, M., Sobczyk, J.T., Sobel, H., Soler, F.J.P., Sonoda, Y., Steinmann, J., Suvorov, S., Suzuki, A., Suzuki, S.Y., Suzuki, Y., Sztuc, A.A., Tada, M., Tajima, M., Takeda, A., Takeuchi, Y., Tanaka, H.K., Tanaka, H.A., Tanaka, S., Thompson, L.F., Toki, W., Touramanis, C., Tsui, K.M., Tsukamoto, T., Tzanov, M., Uchida, Y., Uno, W., Vagins, M., Valder, S., Vallari, Z., Vargas, D., Vasseur, G., Vilela, C., Vinning, W.G.S., Vladisavljevic, T., Volkov, V.V., Wachala, T., Walker, J., Walsh, J.G., Wang, Y., Wark, D., Wascko, M.O., Weber, A., Wendell, R., Wilking, M.J., Wilkinson, C., Wilson, J.R., Wilson, R.J., Wood, K., Wret, C., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yang, G., Yano, T., Yasutome, K., Yen, S., Yershov, N., Yokoyama, M., Yoshida, T., Yu, M., Zalewska, A., Zalipska, J., Zaremba, K., Zarnecki, G., Ziembicki, M., Zimmerman, E.D., Zito, M., Zsoldos, S., Zykova, A.

    2019年12月31日, Phys.Rev.D, 100 (11), 112009 - 112009

    [査読有り]

    研究論文(学術雑誌)

  • Fast simulation of muons produced at the SHiP experiment using Generative Adversarial Networks

    C. Ahdida et al.

    2019年11月27日, JINST, 14 (11), P11028

    [査読有り]

  • Measurement of the cosmic ray muon flux seasonal variation with the OPERA detector

    N. Agafonova et al.

    2019年10月01日, JCAP, 1910, 003

    [査読有り]

  • Abe, K., Akutsu, R., Ali, A., Andreopoulos, C., Anthony, L., Antonova, M., Aoki, S., Ariga, A., Ashida, Y., Awataguchi, Y., Azuma, Y., Ban, S., Barbi, M., Barker, G.J., Barr, G., Barry, C., Batkiewicz-Kwasniak, M., Bench, F., Berardi, V., Berkman, S., Berner, R.M., Berns, L., Bhadra, S., Bienstock, S., Blondel, A., Bolognesi, S., Bourguille, B., Boyd, S.B., Brailsford, D., Bravar, A., Bronner, C., Buizza Avanzini, M., Calcutt, J., Campbell, T., Cao, S., Cartwright, S.L., Catanesi, M.G., Cervera, A., Chappell, A., Checchia, C., Cherdack, D., Chikuma, N., Christodoulou, G., Coleman, J., Collazuol, G., Coplowe, D., Cudd, A., Dabrowska, A., De Rosa, G., Dealtry, T., Denner, P.F., Dennis, S.R., Densham, C., Di Lodovico, F., Dokania, N., Dolan, S., Drapier, O., Duffy, K.E., Dumarchez, J., Dunne, P., Emery-Schrenk, S., Ereditato, A., Fernandez, P., Feusels, T., Finch, A.J., Fiorentini, G.A., Fiorillo, G., Francois, C., Friend, M., Fujii, Y., Fujita, R., Fukuda, D., Fukuda, Y., Gameil, K., Giganti, C., Gizzarelli, F., Golan, T., Gonin, M., Hadley, D.R., Haigh, J.T., Hamacher-Baumann, P., Hartz, M., Hasegawa, T., Hastings, N.C., Hayashino, T., Hayato, Y., Hiramoto, A., Hogan, M., Holeczek, J., Hong Van, N.T., Hosomi, F., Ichikawa, A.K., Ikeda, M., Inoue, T., Intonti, R.A., Ishida, T., Ishii, T., Ishitsuka, M., Iwamoto, K., Izmaylov, A., Jamieson, B., Jesus, C., Jiang, M., Johnson, S., Jonsson, P., Jung, C.K., Kabirnezhad, M., Kaboth, A.C., Kajita, T., Kakuno, H., Kameda, J., Karlen, D., Katori, T., Kato, Y., Kearns, E., Khabibullin, M., Khotjantsev, A., Kim, H., Kim, J., King, S., Kisiel, J., Knight, A., Knox, A., Kobayashi, T., Koch, L., Koga, T., Konaka, A., Kormos, L.L., Koshio, Y., Kowalik, K., Kubo, H., Kudenko, Y., Kurjata, R., Kutter, T., Kuze, M., Labarga, L., Lagoda, J., Lamoureux, M., Lasorak, P., Laveder, M., Lawe, M., Licciardi, M., Lindner, T., Litchfield, R.P., Li, X., Longhin, A., Lopez, J.P., Lou, T., Ludovici, L., Lu, X., Lux, T., Magaletti, L., Mahn, K., Malek, M., Manly, S., Maret, L., Marino, A.D., Martin, J.F., Martins, P., Maruyama, T., Matsubara, T., Matveev, V., Mavrokoridis, K., Ma, W.Y., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K.S., McGrew, C., Mefodiev, A., Metelko, C., Mezzetto, M., Minamino, A., Mineev, O., Mine, S., Miura, M., Moriyama, S., Morrison, J., Mueller, Th.A., Murphy, S., Nagai, Y., Nakadaira, T., Nakahata, M., Nakajima, Y., Nakamura, A., Nakamura, K.G., Nakamura, K., Nakamura, K.D., Nakanishi, Y., Nakayama, S., Nakaya, T., Nakayoshi, K., Nantais, C., Niewczas, K., Nishikawa, K., Nishimura, Y., Nonnenmacher, T.S., Novella, P., Nowak, J., O'Keeffe, H.M., O'Sullivan, L., Okumura, K., Okusawa, T., Oser, S.M., Owen, R.A., Oyama, Y., Palladino, V., Palomino, J.L., Paolone, V., Parker, W.C., Paudyal, P., Pavin, M., Payne, D., Pickering, L., Pidcott, C., Pinzon Guerra, E.S., Pistillo, C., Popov, B., Porwit, K., Posiadala-Zezula, M., Pritchard, A., Quilain, B., Radermacher, T., Radicioni, E., Ratoff, P.N., Reinherz-Aronis, E., Riccio, C., Rondio, E., Rossi, B., Roth, S., Rubbia, A., Ruggeri, A.C., Rychter, A., Sakashita, K., Sánchez, F., Sasaki, S., Scholberg, K., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shah, R., Shaikhiev, A., Shaker, F., Shaw, D., Shaykina, A., Shiozawa, M., Smirnov, A., Smy, M., Sobczyk, J.T., Sobel, H., Sonoda, Y., Steinmann, J., Stewart, T., Stowell, P., Suvorov, S., Suzuki, A., Suzuki, S.Y., Suzuki, Y., Sztuc, A.A., Tacik, R., Tada, M., Takeda, A., Takeuchi, Y., Tamura, R., Tanaka, H.K., Tanaka, H.A., Thompson, L.F., Toki, W., Touramanis, C., Tsui, K.M., Tsukamoto, T., Tzanov, M., Uchida, Y., Uno, W., Vagins, M., Vallari, Z., Vargas, D., Vasseur, G., Vilela, C., Vladisavljevic, T., Volkov, V.V., Wachala, T., Walker, J., Wang, Y., Wark, D., Wascko, M.O., Weber, A., Wendell, R., Wilking, M.J., Wilkinson, C., Wilson, J.R., Wilson, R.J., Wret, C., Yamada, Y., Yamamoto, K., Yamasu, S., Yanagisawa, C., Yang, G., Yano, T., Yasutome, K., Yen, S., Yershov, N., Yokoyama, M., Yoshida, T., Yu, M., Zalewska, A., Zalipska, J., Zaremba, K., Zarnecki, G., Ziembicki, M., Zimmerman, E.D., Zito, M., Zsoldos, S., Zykova, A.

    © 2019 The Author(s). We report a measurement of the flux-integrated νμ charged-current cross sections on water, hydrocarbon, and iron in the T2K on-axis neutrino beam with a mean neutrino energy of 1.5 GeV. The measured cross sections on water, hydrocarbon, and iron are σH2oCC = (0.840±0.010(stat.)+0.10-0.08(syst.)) ×10-38 cm2/nucleon, σCHCC = (0.817±0.007(stat.)+0.11-0.08(syst.)) × 10-38 cm2/nucleon, and σFeCC = (0.859±0.003(stat.)^+0.12-0.10(syst.)) ×10-38 cm2/nucleon, respectively, for a restricted phase space of induced muons: θμ < 45° and pμ > 0.4 GeV/c in the laboratory frame. The measured cross section ratios are σH2oCC/σCHCC = 1.028±0.016(stat.)±0.053(syst.), σFeCC/σH2oCC = 1.023±0.012(stat.)±0.058(syst.), and σFeCC/σCHCC = 1.049±0.010(stat.)±0.043(syst.). These results, with an unprecedented precision for the measurements of neutrino cross sections on water in the studied energy region, show good agreement with the current neutrino interaction models used in the T2K oscillation analyses.

    2019年09月26日, Progress of Theoretical and Experimental Physics, 2019

    [査読有り]

    研究論文(学術雑誌)

  • Development of a balloon-style pressure vessel gondola for balloon-borne emulsion gamma-ray telescopes

    H. Rokujo et al.

    2019年09月12日, JINST, 14 (9), P09009

    [査読有り]

  • Abe, K., Akutsu, R., Ali, A., Andreopoulos, C., Anthony, L., Antonova, M., Aoki, S., Ariga, A., Ashida, Y., Awataguchi, Y., Azuma, Y., Ban, S., Barbi, M., Barker, G.J., Barr, G., Barry, C., Batkiewicz-Kwasniak, M., Bench, F., Berardi, V., Berkman, S., Berner, R.M., Berns, L., Bhadra, S., Bienstock, S., Blondel, A., Bolognesi, S., Bourguille, B., Boyd, S.B., Brailsford, D., Bravar, A., Bronner, C., Buizza Avanzini, M., Calcutt, J., Campbell, T., Cao, S., Cartwright, S.L., Catanesi, M.G., Cervera, A., Chappell, A., Checchia, C., Cherdack, D., Chikuma, N., Christodoulou, G., Coleman, J., Collazuol, G., Coplowe, D., Cudd, A., Dabrowska, A., De Rosa, G., Dealtry, T., Denner, P.F., Dennis, S.R., Densham, C., Di Lodovico, F., Dokania, N., Dolan, S., Drapier, O., Duffy, K.E., Dumarchez, J., Dunne, P., Emery-Schrenk, S., Ereditato, A., Fernandez, P., Feusels, T., Finch, A.J., Fiorentini, G.A., Fiorillo, G., Francois, C., Friend, M., Fujii, Y., Fujita, R., Fukuda, D., Fukuda, Y., Gameil, K., Giganti, C., Gizzarelli, F., Golan, T., Gonin, M., Hadley, D.R., Haegel, L., Haigh, J.T., Hamacher-Baumann, P., Hartz, M., Hasegawa, T., Hastings, N.C., Hayashino, T., Hayato, Y., Hiramoto, A., Hogan, M., Holeczek, J., Hong Van, N.T., Hosomi, F., Iacob, F., Ichikawa, A.K., Ikeda, M., Inoue, T., Intonti, R.A., Ishida, T., Ishii, T., Ishitsuka, M., Iwamoto, K., Izmaylov, A., Jamieson, B., Jesus, C., Jiang, M., Johnson, S., Jonsson, P., Jung, C.K., Kabirnezhad, M., Kaboth, A.C., Kajita, T., Kakuno, H., Kameda, J., Karlen, D., Katori, T., Kato, Y., Kearns, E., Khabibullin, M., Khotjantsev, A., Kim, H., Kim, J., King, S., Kisiel, J., Knight, A., Knox, A., Kobayashi, T., Koch, L., Koga, T., Koller, P.P., Konaka, A., Kormos, L.L., Koshio, Y., Kowalik, K., Kubo, H., Kudenko, Y., Kurjata, R., Kutter, T., Kuze, M., Labarga, L., Lagoda, J., Lamoureux, M., Lasorak, P., Laveder, M., Lawe, M., Licciardi, M., Lindner, T., Liptak, Z.J., Litchfield, R.P., Li, X., Longhin, A., Lopez, J.P., Lou, T., Ludovici, L., Lu, X., Lux, T., Magaletti, L., Mahn, K., Malek, M., Manly, S., Maret, L., Marino, A.D., Martin, J.F., Martins, P., Maruyama, T., Matsubara, T., Matveev, V., Mavrokoridis, K., Ma, W.Y., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K.S., McGrew, C., Mefodiev, A., Metelko, C., Mezzetto, M., Minamino, A., Mineev, O., Mine, S., Miura, M., Molina Bueno, L., Moriyama, S., Morrison, J., Mueller, Th.A., Murphy, S., Nagai, Y., Nakadaira, T., Nakahata, M., Nakajima, Y., Nakamura, A., Nakamura, K.G., Nakamura, K., Nakamura, K.D., Nakanishi, Y., Nakayama, S., Nakaya, T., Nakayoshi, K., Nantais, C., Niewczas, K., Nishikawa, K., Nishimura, Y., Nonnenmacher, T.S., Novella, P., Nowak, J., O'Keeffe, H.M., O'Sullivan, L., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S.M., Owen, R.A., Oyama, Y., Palladino, V., Palomino, J.L., Paolone, V., Parker, W.C., Paudyal, P., Pavin, M., Payne, D., Pickering, L., Pidcott, C., Pinzon Guerra, E.S., Pistillo, C., Popov, B., Porwit, K., Posiadala-Zezula, M., Pritchard, A., Quilain, B., Radermacher, T., Radicioni, E., Radics, B., Ratoff, P.N., Reinherz-Aronis, E., Riccio, C., Rondio, E., Rossi, B., Roth, S., Rubbia, A., Ruggeri, A.C., Rychter, A., Sakashita, K., Sánchez, F., Sasaki, S., Scantamburlo, E., Schloesser, C.M., Scholberg, K., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shah, R., Shaikhiev, A., Shaker, F., Shaw, D., Shaykina, A., Shiozawa, M., Smirnov, A., Smy, M., Sobczyk, J.T., Sobel, H., Sonoda, Y., Steinmann, J., Stewart, T., Stowell, P., Suda, Y., Suvorov, S., Suzuki, A., Suzuki, S.Y., Suzuki, Y., Sztuc, A.A., Tacik, R., Tada, M., Takeda, A., Takeuchi, Y., Tamura, R., Tanaka, H.K., Tanaka, H.A., Thakore, T., Thompson, L.F., Toki, W., Touramanis, C., Tsui, K.M., Tsukamoto, T., Tzanov, M., Uchida, Y., Uno, W., Vagins, M., Vallari, Z., Vargas, D., Vasseur, G., Vilela, C., Vladisavljevic, T., Volkov, V.V., Wachala, T., Walker, J., Wang, Y., Wark, D., Wascko, M.O., Weber, A., Wendell, R., Wilking, M.J., Wilkinson, C., Wilson, J.R., Wilson, R.J., Wret, C., Yamada, Y., Yamamoto, K., Yamasu, S., Yanagisawa, C., Yang, G., Yano, T., Yasutome, K., Yen, S., Yershov, N., Yokoyama, M., Yoshida, T., Yu, M., Zalewska, A., Zalipska, J., Zaremba, K., Zarnecki, G., Ziembicki, M., Zimmerman, E.D., Zito, M., Zsoldos, S., Zykova, A.

    © 2019 authors. Published by the American Physical Society. This paper reports on the search for heavy neutrinos with masses in the range 140<MN<493 MeV/c2 using the off-axis near detector ND280 of the T2K experiment. These particles can be produced from kaon decays in the standard neutrino beam and then subsequently decay in ND280. The decay modes under consideration are N→ℓα±π and N→ℓα+ℓβ-ν(-)(α,β=e,μ). A search for such events has been made using the Time Projection Chambers of ND280, where the background has been reduced to less than two events in the current dataset in all channels. No excess has been observed in the signal region. A combined Bayesian statistical approach has been applied to extract upper limits on the mixing elements of heavy neutrinos to electron-, muon- and tau- flavored currents (Ue2, Uμ2, Uτ2) as a function of the heavy neutrino mass, e.g., Ue2<10-9 at 90% C.L. for a mass of 390 MeV/c2. These constraints are competitive with previous experiments.

    2019年09月11日, Phys.Rev.D, 100 (5), 052006 - 052006

    [査読有り]

    研究論文(学術雑誌)

  • Final results on neutrino oscillation parameters from the OPERA experiment in the CNGS beam

    N. Agafonova et al.

    2019年09月07日, Phys. Rev. D, 100 (5), 051301

    [査読有り]

  • Abe, K., Akutsu, R., Ali, A., Andreopoulos, C., Anthony, L., Antonova, M., Aoki, S., Ariga, A., Ashida, Y., Awataguchi, Y., Azuma, Y., Ban, S., Barbi, M., Barker, G.J., Barr, G., Barry, C., Batkiewicz-Kwasniak, M., Bench, F., Berardi, V., Berkman, S., Berner, R.M., Berns, L., Bhadra, S., Bienstock, S., Blondel, A., Bolognesi, S., Bourguille, B., Boyd, S.B., Brailsford, D., Bravar, A., Bronner, C., Buizza Avanzini, M., Calcutt, J., Campbell, T., Cao, S., Cartwright, S.L., Catanesi, M.G., Cervera, A., Chappell, A., Checchia, C., Cherdack, D., Chikuma, N., Christodoulou, G., Coleman, J., Collazuol, G., Coplowe, D., Cudd, A., Dabrowska, A., De Rosa, G., Dealtry, T., Denner, P.F., Dennis, S.R., Densham, C., Di Lodovico, F., Dokania, N., Dolan, S., Drapier, O., Duffy, K.E., Dumarchez, J., Dunne, P., Emery-Schrenk, S., Ereditato, A., Fernandez, P., Feusels, T., Finch, A.J., Fiorentini, G.A., Fiorillo, G., Francois, C., Friend, M., Fujii, Y., Fujita, R., Fukuda, D., Fukuda, Y., Gameil, K., Giganti, C., Gizzarelli, F., Golan, T., Gonin, M., Hadley, D.R., Haigh, J.T., Hamacher-Baumann, P., Hartz, M., Hasegawa, T., Hastings, N.C., Hayashino, T., Hayato, Y., Hiramoto, A., Hogan, M., Holeczek, J., Hong Van, N.T., Hosomi, F., Ichikawa, A.K., Ikeda, M., Inoue, T., Intonti, R.A., Ishida, T., Ishii, T., Ishitsuka, M., Iwamoto, K., Izmaylov, A., Jamieson, B., Jesus, C., Jiang, M., Johnson, S., Jonsson, P., Jung, C.K., Kabirnezhad, M., Kaboth, A.C., Kajita, T., Kakuno, H., Kameda, J., Karlen, D., Katori, T., Kato, Y., Kearns, E., Khabibullin, M., Khotjantsev, A., Kim, H., Kim, J., King, S., Kisiel, J., Knight, A., Knox, A., Kobayashi, T., Koch, L., Koga, T., Konaka, A., Kormos, L.L., Koshio, Y., Kowalik, K., Kubo, H., Kudenko, Y., Kurjata, R., Kutter, T., Kuze, M., Labarga, L., Lagoda, J., Lamoureux, M., Lasorak, P., Laveder, M., Lawe, M., Licciardi, M., Lindner, T., Litchfield, R.P., Li, X., Longhin, A., Lopez, J.P., Lou, T., Ludovici, L., Lu, X., Lux, T., Magaletti, L., Mahn, K., Malek, M., Manly, S., Maret, L., Marino, A.D., Martin, J.F., Martins, P., Maruyama, T., Matsubara, T., Matveev, V., Mavrokoridis, K., Ma, W.Y., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K.S., McGrew, C., Mefodiev, A., Metelko, C., Mezzetto, M., Minamino, A., Mineev, O., Mine, S., Miura, M., Moriyama, S., Morrison, J., Mueller, Th.A., Murphy, S., Nagai, Y., Nakadaira, T., Nakahata, M., Nakajima, Y., Nakamura, A., Nakamura, K.G., Nakamura, K., Nakamura, K.D., Nakanishi, Y., Nakayama, S., Nakaya, T., Nakayoshi, K., Nantais, C., Niewczas, K., Nishikawa, K., Nishimura, Y., Nonnenmacher, T.S., Novella, P., Nowak, J., O'Keeffe, H.M., O'Sullivan, L., Okumura, K., Okusawa, T., Oser, S.M., Owen, R.A., Oyama, Y., Palladino, V., Palomino, J.L., Paolone, V., Parker, W.C., Paudyal, P., Pavin, M., Payne, D., Pickering, L., Pidcott, C., Pinzon Guerra, E.S., Pistillo, C., Popov, B., Porwit, K., Posiadala-Zezula, M., Pritchard, A., Quilain, B., Radermacher, T., Radicioni, E., Ratoff, P.N., Reinherz-Aronis, E., Riccio, C., Rondio, E., Rossi, B., Roth, S., Rubbia, A., Ruggeri, A.C., Rychter, A., Sakashita, K., Sánchez, F., Sasaki, S., Scholberg, K., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shah, R., Shaikhiev, A., Shaker, F., Shaw, D., Shaykina, A., Shiozawa, M., Smirnov, A., Smy, M., Sobczyk, J.T., Sobel, H., Sonoda, Y., Steinmann, J., Stewart, T., Stowell, P., Suvorov, S., Suzuki, A., Suzuki, S.Y., Suzuki, Y., Sztuc, A.A., Tacik, R., Tada, M., Takeda, A., Takeuchi, Y., Tamura, R., Tanaka, H.K., Tanaka, H.A., Thompson, L.F., Toki, W., Touramanis, C., Tsui, K.M., Tsukamoto, T., Tzanov, M., Uchida, Y., Uno, W., Vagins, M., Vallari, Z., Vargas, D., Vasseur, G., Vilela, C., Vladisavljevic, T., Volkov, V.V., Wachala, T., Walker, J., Wang, Y., Wark, D., Wascko, M.O., Weber, A., Wendell, R., Wilking, M.J., Wilkinson, C., Wilson, J.R., Wilson, R.J., Wret, C., Yamada, Y., Yamamoto, K., Yamasu, S., Yanagisawa, C., Yang, G., Yano, T., Yasutome, K., Yen, S., Yershov, N., Yokoyama, M., Yoshida, T., Yu, M., Zalewska, A., Zalipska, J., Zaremba, K., Zarnecki, G., Ziembicki, M., Zimmerman, E.D., Zito, M., Zsoldos, S., Zykova, A.

    2019年06月20日, J.Phys.G, 46 (8), 08LT01, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe K, Akutsu R, Ali A, Andreopoulos C, Anthony L, Antonova M, Aoki S, Ariga A, Ashida Y, Awataguchi Y, Azuma Y, Ban S, Barbi M, Barker G.J, Barr G, Barry C, Batkiewicz-Kwasniak M, Bench F, Berardi V, Berkman S, Berner R.M, Berns L, Bhadra S, Bienstock S, Blondel A, Bolognesi S, Bourguille B, Boyd S.B, Brailsford D, Bravar A, Bronner C, Buizza Avanzini M, Calcutt J, Campbell T, Cao S, Cartwright S.L, Catanesi M.G, Cervera A, Chappell A, Checchia C, Cherdack D, Chikuma N, Christodoulou G, Coleman J, Collazuol G, Coplowe D, Cudd A, Dabrowska A, De Rosa G, Dealtry T, Denner P.F, Dennis S.R, Densham C, Di Lodovico F, Dokania N, Dolan S, Drapier O, Duffy K.E, Dumarchez J, Dunne P, Emery-Schrenk S, Ereditato A, Fernandez P, Feusels T, Finch A.J, Fiorentini G.A, Fiorillo G, Francois C, Friend M, Fujii Y, Fujita R, Fukuda D, Fukuda Y, Gameil K, Giganti C, Gizzarelli F, Golan T, Gonin M, Hadley D.R, Haigh J.T, Hamacher-Baumann P, Hartz M, Hasegawa T, Hastings N.C, Hayashino T, Hayato Y, Hiramoto A, Hogan M, Holeczek J, Hong Van N.T, Hosomi F, Iacob F, Ichikawa A.K, Ikeda M, Inoue T, Intonti R.A, Ishida T, Ishii T, Ishitsuka M, Iwamoto K, Izmaylov A, Jamieson B, Jesus C, Jiang M, Johnson S, Jonsson P, Jung C.K, Kabirnezhad M, Kaboth A.C, Kajita T, Kakuno H, Kameda J, Karlen D, Katori T, Kato Y, Kearns E, Khabibullin M, Khotjantsev A, Kim H, Kim J, King S, Kisiel J, Knight A, Knox A, Kobayashi T, Koch L, Koga T, Konaka A, Kormos L.L, Koshio Y, Kowalik K, Kubo H, Kudenko Y, Kurjata R, Kutter T, Kuze M, Labarga L, Lagoda J, Lamoureux M, Lasorak P, Laveder M, Lawe M, Licciardi M, Lindner T, Litchfield R.P, Li X, Longhin A, Lopez J.P, Lou T, Ludovici L, Lu X, Lux T, Magaletti L, Mahn K, Malek M, Manly S, Maret L, Marino A.D, Martin J.F, Martins P, Maruyama T, Matsubara T, Matveev V, Mavrokoridis K, Ma W.Y, Mazzucato E, McCarthy M, McCauley N, McFarland K.S, McGrew C, Mefodiev A, Metelko C, Mezzetto M, Minamino A, Mineev O, Mine S, Miura M, Molina Bueno L, Moriyama S, Morrison J, Mueller T.A, Murphy S, Nagai Y, Nakadaira T, Nakahata M, Nakajima Y, Nakamura A, Nakamura K.G, Nakamura K, Nakamura K.D, Nakanishi Y, Nakayama S, Nakaya T, Nakayoshi K, Nantais C, Niewczas K, Nishikawa K, Nishimura Y, Nonnenmacher T.S, Novella P, Nowak J, O{'}Keeffe H.M, O{'}Sullivan L, Okumura K, Okusawa T, Oser S.M, Owen R.A, Oyama Y, Palladino V, Palomino J.L, Paolone V, Parker W.C, Paudyal P, Pavin M, Payne D, Pickering L, Pidcott C, Pinzon Guerra E.S, Pistillo C, Popov B, Porwit K, Posiadala-Zezula M, Pritchard A, Quilain B, Radermacher T, Radicioni E, Radics B, Ratoff P.N, Reinherz-Aronis E, Riccio C, Rondio E, Rossi B, Roth S, Rubbia A, Ruggeri A.C, Rychter A, Sakashita K, S{\'a}nchez F, Sasaki S, Schloesser C.M, Scholberg K, Schwehr J, Scott M, Seiya Y, Sekiguchi T, Sekiya H, Sgalaberna D, Shah R, Shaikhiev A, Shaker F, Shaw D, Shaykina A, Shiozawa M, Smirnov A, Smy M, Sobczyk J.T, Sobel H, Sonoda Y, Steinmann J, Stewart T, Stowell P, Suvorov S, Suzuki A, Suzuki S.Y, Suzuki Y, Sztuc A.A, Tacik R, Tada M, Takeda A, Takeuchi Y, Tamura R, Tanaka H.K, Tanaka H.A, Thompson L.F, Toki W, Touramanis C, Tsui K.M, Tsukamoto T, Tzanov M, Uchida Y, Uno W, Vagins M, Vallari Z, Vargas D, Vasseur G, Vilela C, Vladisavljevic T, Volkov V.V, Wachala T, Walker J, Wang Y, Wark D, Wascko M.O, Weber A, Wendell R, Wilking M.J, Wilkinson C, Wilson J.R, Wilson R.J, Wret C, Yamada Y, Yamamoto K, Yamasu S, Yanagisawa C, Yang G, Yano T, Yasutome K, Yen S, Yershov N, Yokoyama M, Yoshida T, Yu M, Zalewska A, Zalipska J, Zaremba K, Zarnecki G, Ziembicki M, Zimmerman E.D, Zito M, Zsoldos S, Zykova A

    2019年04月30日, Physical Review D, 99 (7)

    [査読有り]

  • Sensitivity of the SHiP experiment to Heavy Neutral Leptons

    C. Ahdida et al.

    2019年04月09日, JHEP, 2019 (04), 077

    [査読有り]

  • The experimental facility for the Search for Hidden Particles at the CERN SPS

    C. Ahdida et al.

    2019年03月25日, JINST, 14 (3), P03025

    [査読有り]

  • GRAINE project, prospects for scientific balloon-borne experiments

    S. Takahashi et al.

    2018年11月15日, Advances in Space Research, 62 (10), 2945 - 2953

    [査読有り]

  • Abe, K., Akutsu, R., Ali, A., Amey, J., Andreopoulos, C., Anthony, L., Antonova, M., Aoki, S., Ariga, A., Ashida, Y., Azuma, Y., Ban, S., Barbi, M., Barker, G.J., Barr, G., Barry, C., Batkiewicz, M., Bench, F., Berardi, V., Berkman, S., Berner, R.M., Berns, L., Bhadra, S., Bienstock, S., Blondel, A., Bolognesi, S., Bourguille, B., Boyd, S.B., Brailsford, D., Bravar, A., Bronner, C., Buizza Avanzini, M., Calcutt, J., Campbell, T., Cao, S., Cartwright, S.L., Catanesi, M.G., Cervera, A., Chappell, A., Checchia, C., Cherdack, D., Chikuma, N., Christodoulou, G., Coleman, J., Collazuol, G., Coplowe, D., Cudd, A., Dabrowska, A., De Rosa, G., Dealtry, T., Denner, P.F., Dennis, S.R., Densham, C., Di Lodovico, F., Dokania, N., Dolan, S., Drapier, O., Duffy, K.E., Dumarchez, J., Dunne, P., Emery-Schrenk, S., Ereditato, A., Fernandez, P., Feusels, T., Finch, A.J., Fiorentini, G.A., Fiorillo, G., Francois, C., Friend, M., Fujii, Y., Fujita, R., Fukuda, D., Fukuda, Y., Gameil, K., Giganti, C., Gizzarelli, F., Golan, T., Gonin, M., Hadley, D.R., Haegel, L., Haigh, J.T., Hamacher-Baumann, P., Hansen, D., Harada, J., Hartz, M., Hasegawa, T., Hastings, N.C., Hayashino, T., Hayato, Y., Hiramoto, A., Hogan, M., Holeczek, J., Hosomi, F., Ichikawa, A.K., Ikeda, M., Imber, J., Inoue, T., Intonti, R.A., Ishida, T., Ishii, T., Ishitsuka, M., Iwamoto, K., Izmaylov, A., Jamieson, B., Jiang, M., Johnson, S., Jonsson, P., Jung, C.K., Kabirnezhad, M., Kaboth, A.C., Kajita, T., Kakuno, H., Kameda, J., Karlen, D., Katori, T., Kato, Y., Kearns, E., Khabibullin, M., Khotjantsev, A., Kim, H., Kim, J., King, S., Kisiel, J., Knight, A., Knox, A., Kobayashi, T., Koch, L., Koga, T., Koller, P.P., Konaka, A., Kormos, L.L., Koshio, Y., Kowalik, K., Kubo, H., Kudenko, Y., Kurjata, R., Kutter, T., Kuze, M., Labarga, L., Lagoda, J., Lamoureux, M., Lasorak, P., Laveder, M., Lawe, M., Licciardi, M., Lindner, T., Liptak, Z.J., Litchfield, R.P., Li, X., Longhin, A., Lopez, J.P., Lou, T., Ludovici, L., Lu, X., Magaletti, L., Mahn, K., Malek, M., Manly, S., Maret, L., Marino, A.D., Martin, J.F., Martins, P., Maruyama, T., Matsubara, T., Matveev, V., Mavrokoridis, K., Ma, W.Y., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K.S., McGrew, C., Mefodiev, A., Metelko, C., Mezzetto, M., Minamino, A., Mineev, O., Mine, S., Missert, A., Miura, M., Moriyama, S., Morrison, J., Mueller, Th.A., Murphy, S., Nagai, Y., Nakadaira, T., Nakahata, M., Nakajima, Y., Nakamura, K.G., Nakamura, K., Nakamura, K.D., Nakanishi, Y., Nakayama, S., Nakaya, T., Nakayoshi, K., Nantais, C., Nielsen, C., Niewczas, K., Nishikawa, K., Nishimura, Y., Nonnenmacher, T.S., Novella, P., Nowak, J., O'Keeffe, H.M., O'Sullivan, L., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S.M., Owen, R.A., Oyama, Y., Palladino, V., Palomino, J.L., Paolone, V., Paudyal, P., Pavin, M., Payne, D., Pickering, L., Pidcott, C., Pinzon Guerra, E.S., Pistillo, C., Popov, B., Porwit, K., Posiadala-Zezula, M., Pritchard, A., Quilain, B., Radermacher, T., Radicioni, E., Ratoff, P.N., Reinherz-Aronis, E., Riccio, C., Rondio, E., Rossi, B., Roth, S., Rubbia, A., Ruggeri, A.C., Rychter, A., Sakashita, K., Sánchez, F., Sasaki, S., Scantamburlo, E., Scholberg, K., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shah, R., Shaikhiev, A., Shaker, F., Shaw, D., Shiozawa, M., Smirnov, A., Smy, M., Sobczyk, J.T., Sobel, H., Sonoda, Y., Steinmann, J., Stewart, T., Stowell, P., Suda, Y., Suvorov, S., Suzuki, A., Suzuki, S.Y., Suzuki, Y., Sztuc, A.A., Tacik, R., Tada, M., Takeda, A., Takeuchi, Y., Tamura, R., Tanaka, H.K., Tanaka, H.A., Thakore, T., Thompson, L.F., Toki, W., Touramanis, C., Tsui, K.M., Tsukamoto, T., Tzanov, M., Uchida, Y., Uno, W., Vagins, M., Vallari, Z., Vasseur, G., Vilela, C., Vladisavljevic, T., Volkov, V.V., Wachala, T., Walker, J., Wang, Y., Wark, D., Wascko, M.O., Weber, A., Wendell, R., Wilking, M.J., Wilkinson, C., Wilson, J.R., Wilson, R.J., Wret, C., Yamada, Y., Yamamoto, K., Yamasu, S., Yanagisawa, C., Yang, G., Yano, T., Yasutome, K., Yen, S., Yershov, N., Yokoyama, M., Yoshida, T., Yu, M., Zalewska, A., Zalipska, J., Zaremba, K., Zarnecki, G., Ziembicki, M., Zimmerman, E.D., Zito, M., Zsoldos, S., Zykova, A.

    2018年10月24日, Phys.Rev.Lett., 121 (17), 171802 - 171802, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe, K., Amey, Josh, Andreopoulos, Costas, Anthony, Lauren, Antonova, Maria, Aoki, Shigeki, Ariga, Akitaka, Ashida, Yosuke, Azuma, Yuma, Ban, Sei, Barbi, Mauricio, Barker, Gary J, Barr, Giles, Barry, Christopher, Batkiewicz, Marcela, Berardi, Vincenzo, Berkman, Sophie, Berner, Roman Matthias, Berns, Lukas, Bhadra, Sampa, Bienstock, Simon, Blondel, Alain, Bolognesi, Sara, Bordoni, Stefania, Bourguille, Bruno, Boyd, Steve B, Brailsford, Dominic, Bravar, Alessandro, Bronner, Christophe, Buizza Avanzini, Margherita, Calcutt, Jacob, Campbell, Thomas, Cao, Son, Cartwright, Susan L, Catanesi, Maria Gabriella, Cervera, Anselmo, Chappell, Andrew, Checchia, Caterina, Cherdack, Daniel, Chikuma, Naruhiro, Christodoulou, Georgios, Coleman, Jonathon, Collazuol, Gianmaria, Coplowe, David, Cudd, Andrew, Dabrowska, Anna, De Rosa, Gianfranca, Dealtry, Thomas, Denner, Paula F, Dennis, Stephen R, Densham, Chris, Di Lodovico, Francesca, Dolan, Stephen, Drapier, Olivier, Duffy, Kirsty E, Dumarchez, Jacques, Dunne, Patrick, Emery-Schrenk, Sandrine, Ereditato, Antonio, Feusels, Tom, Finch, Alexander J, Fiorentini, G A, Fiorillo, Giuliana, Francois, Conor, Friend, Megan, Fujii, Yoshiaki, Fukuda, Daisuke, Fukuda, Yoshiyuki, Garcia, Alfonso, Giganti, Claudio, Gizzarelli, Francesco, Golan, Tomasz, Gonin, Michel, Hadley, David R, Haegel, Leïla, Haigh, Jennifer T, Hamacher-Baumann, Philip, Hansen, Damon, Harada, Jun, Hartz, Mark, Hasegawa, Takuya, Hastings, Nicholas C, Hayashino, Tatsuya, Hayato, Yoshinari, Hiraki, Takahiro, Hiramoto, Ayami, Hirota, Seiko, Hogan, Matthew, Holeczek, Jacek, Hosomi, Fuminao, Ichikawa, Atsuko K, Ikeda, Motoyasu, Imber, James, Inoue, Tsubasa, Intonti, Rosaria Annalisa, Ishida, Taku, Ishii, Takanobu, Iwamoto, Konosuke, Izmaylov, Alexander, Jamieson, Blair, Jiang, Miao, Johnson, Scott, Jonsson, Per, Jung, C K, Kabirnezhad, Monireh, Kaboth, Asher C, Kajita, Takaaki, Kakuno, Hidekazu, Kameda, Jun, Karlen, Dean, Katori, Teppei, Kearns, E., Khabibullin, Marat, Khotjantsev, Alexei, Kim, Hyunil, Kim, Jiae, King, Sophie, Kisiel, Jan, Knight, Aaron, Knox, Alasdair, Kobayashi, Takashi, Koch, Lukas, Koga, Taichiro, Koller, Patrick P, Konaka, Akira, Kormos, Laura L, Koshio, Yusuke, Kowalik, Katarzyna, Kudenko, Yury, Kurjata, Robert, Kutter, Thomas, Labarga, Luis, Lagoda, Justyna, Lamont, Iain, Lamoureux, Mathieu, Lasorak, Pierre, Laveder, Marco, Lawe, Matthew, Licciardi, Matthieu, Lindner, Thomas, Liptak, Zachary J, Litchfield, R Phillip, Li, Xiaoyue, Longhin, Andrea, Lopez, Jeremy P, Lou, Tianmeng, Ludovici, Lucio, Lu, Xianguo, Magaletti, Lorenzo, Mahn, Kendall, Malek, Matthew, Manly, Steven, Maret, Lucie, Marino, Alysia D, Martin, J F, Martins, Paul, Martynenko, Sergey, Maruyama, Takasumi, Matveev, Victor, Mavrokoridis, Konstantinos, Ma, Wing Y, Mazzucato, Edoardo, McCarthy, Mark, McCauley, Neil, McFarland, Kevin S, McGrew, Clark, Mefodiev, Alexander, Metelko, Carl, Mezzetto, Mauro, Minamino, Akihiro, Mineev, Oleg, Mine, Shunichi, Missert, Andrew, Miura, Makoto, Moriyama, Shigetaka, Morrison, Jacob, Mueller, Th A, Nagai, Yoshikazu, Nakadaira, Takeshi, Nakahata, Masayuki, Nakamura, Keigo G, Nakamura, Kenzo, Nakamura, Kiseki D, Nakanishi, Yoshie, Nakayama, Shoei, Nakaya, Tsuyoshi, Nakayoshi, Kazuo, Nantais, Corina, Nielsen, Christine, Niewczas, Kajetan, Nishikawa, Koichiro, Nishimura, Yasuhiro, Novella, Pau, Nowak, Jaroslaw, O'Keeffe, Helen M, Okumura, Kimihiro, Okusawa, Toru, Oryszczak, Wojciech, Oser, Scott M, Ovsyannikova, Tatiana, Owen, R A, Oyama, Yuichi, Palladino, Vittorio, Palomino, Jose L, Paolone, Vittorio, Paudyal, Pratiksha, Pavin, Matej, Payne, David, Petrov, Yevgeniy, Pickering, Luke, Pinzon Guerra, Elder Sebastian, Pistillo, Ciro, Popov, Boris, Posiadala-Zezula, Magdalena, Pritchard, Adrian, Przewlocki, Pawel, Quilain, Benjamin, Radermacher, Thomas, Radicioni, Emilio, Ratoff, Peter N, Rayner, Mark A, Reinherz-Aronis, Erez, Riccio, Ciro, Rondio, Ewa, Rossi, Biagio, Roth, Stefan, Ruggeri, Alan C, Rychter, Andrzej, Sakashita, Ken, Sanchez, Federico, Sasaki, Shinnosuke, Scantamburlo, Enrico, Scholberg, Kate, Schwehr, Jaclyn, Scott, Mark, Seiya, Yoshihiro, Sekiguchi, Tetsuro, Sekiya, Hiroyuki, Sgalaberna, Davide, Shah, Raj, Shaikhiev, Artur, Shaker, Fady, Shaw, Dave, Shiozawa, Masato, Smirnov, Alexei, Smy, Michael, Sobczyk, Jan T, Sobel, Henry, Steinmann, Jochen, Stewart, Trevor, Stowell, Patrick, Suda, Yusuke, Suvorov, Sergey, Suzuki, Atsumu, Suzuki, Soh Y, Suzuki, Yoichiro, Tacik, Roman, Tada, Masaru, Takeda, Atsushi, Takeuchi, Yasuo, Tamura, Riku, Tanaka, Hide K, Tanaka, Hirohisa A, Thakore, Tarak, Thompson, Lee F, Toki, Walter, Tsukamoto, Toshifumi, Tzanov, Martin, Uno, Wataru, Vagins, Mark, Vallari, Zoya, Vasseur, Georges, Vilela, Cristovao, Vladisavljevic, Tomislav, Wachala, Tomasz, Walker, John, Walter, C W, Wang, Yue, Wark, David, Wascko, Morgan O, Weber, Alfons, Wendell, Roger, Wilking, Michael J, Wilkinson, Callum, Wilson, Jeanne R, Wilson, Robert J, Wret, Clarence, Yamada, Yoshikazu, Yamamoto, Kazuhiro, Yamasu, Saki, Yanagisawa, C, Yano, Takatomi, Yen, Stanley, Yershov, Nikolai, Yokoyama, Masashi, Yu, Mitchell, Zalewska, Agnieszka, Zalipska, Joanna, Zambelli, Laura, Zaremba, Krzysztof, Ziembicki, Marcin, Zimmerman, E D, Zito, Marco, Zsoldos, Stephane, Zykova, Anastasiia

    2018年08月10日, Phys.Rev.D, 98 (3), 032003 - 032003, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe, K., Amey, J., Andreopoulos, C., Anthony, L., Antonova, M., Aoki, S., Ariga, A., Ashida, Y., Azuma, Y., Ban, S., Barbi, M., Barker, G.J., Barr, G., Barry, C., Batkiewicz, M., Berardi, V., Berkman, S., Berner, R.M., Bhadra, S., Bienstock, S., Blondel, A., Bolognesi, S., Bordoni, S., Bourguille, B., Boyd, S.B., Brailsford, D., Bravar, A., Bronner, C., Buizza Avanzini, M., Calcutt, J., Campbell, T., Cao, S., Cartwright, S.L., Catanesi, M.G., Cervera, A., Chappell, A., Checchia, C., Cherdack, D., Chikuma, N., Christodoulou, G., Coleman, J., Collazuol, G., Coplowe, D., Cudd, A., Dabrowska, A., De Rosa, G., Dealtry, T., Denner, P.F., Dennis, S.R., Densham, C., Di Lodovico, F., Dolan, S., Drapier, O., Duffy, K.E., Dumarchez, J., Dunne, P., Emery-Schrenk, S., Ereditato, A., Feusels, T., Finch, A.J., Fiorentini, G.A., Fiorillo, G., Francois, C., Friend, M., Fujii, Y., Fukuda, D., Fukuda, Y., Garcia, A., Giganti, C., Gizzarelli, F., Golan, T., Gonin, M., Hadley, D.R., Haegel, L., Haigh, J.T., Hamacher-Baumann, P., Hansen, D., Harada, J., Hartz, M., Hasegawa, T., Hastings, N.C., Hayashino, T., Hayato, Y., Hiraki, T., Hiramoto, A., Hirota, S., Hogan, M., Holeczek, J., Hosomi, F., Ichikawa, A.K., Ikeda, M., Imber, J., Inoue, T., Intonti, R.A., Ishida, T., Ishii, T., Iwamoto, K., Izmaylov, A., Jamieson, B., Jiang, M., Johnson, S., Jonsson, P., Jung, C.K., Kabirnezhad, M., Kaboth, A.C., Kajita, T., Kakuno, H., Kameda, J., Karlen, D., Katori, T., Kearns, E., Khabibullin, M., Khotjantsev, A., Kim, H., Kim, J., King, S., Kisiel, J., Knight, A., Knox, A., Kobayashi, T., Koch, L., Koga, T., Koller, P.P., Konaka, A., Kormos, L.L., Koshio, Y., Kowalik, K., Kudenko, Y., Kurjata, R., Kutter, T., Labarga, L., Lagoda, J., Lamont, I., Lamoureux, M., Lasorak, P., Laveder, M., Lawe, M., Licciardi, M., Lindner, T., Liptak, Z.J., Litchfield, R.P., Li, X., Longhin, A., Lopez, J.P., Lou, T., Ludovici, L., Lu, X., Magaletti, L., Mahn, K., Malek, M., Manly, S., Maret, L., Marino, A.D., Martin, J.F., Martins, P., Martynenko, S., Maruyama, T., Matveev, V., Mavrokoridis, K., Ma, W.Y., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K.S., McGrew, C., Mefodiev, A., Metelko, C., Mezzetto, M., Minamino, A., Mineev, O., Mine, S., Missert, A., Miura, M., Moriyama, S., Morrison, J., Mueller, Th.A., Nagai, Y., Nakadaira, T., Nakahata, M., Nakamura, K.G., Nakamura, K., Nakamura, K.D., Nakanishi, Y., Nakayama, S., Nakaya, T., Nakayoshi, K., Nantais, C., Nielsen, C., Niewczas, K., Nishikawa, K., Nishimura, Y., Novella, P., Nowak, J., O'Keeffe, H.M., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S.M., Ovsyannikova, T., Owen, R.A., Oyama, Y., Palladino, V., Palomino, J.L., Paolone, V., Paudyal, P., Pavin, M., Payne, D., Petrov, Y., Pickering, L., Pinzon Guerra, E.S., Pistillo, C., Popov, B., Posiadala-Zezula, M., Pritchard, A., Przewlocki, P., Quilain, B., Radermacher, T., Radicioni, E., Ratoff, P.N., Rayner, M.A., Reinherz-Aronis, E., Riccio, C., Rondio, E., Rossi, B., Roth, S., Ruggeri, A.C., Rychter, A., Sakashita, K., Sánchez, F., Sasaki, S., Scantamburlo, E., Scholberg, K., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shah, R., Shaikhiev, A., Shaker, F., Shaw, D., Shiozawa, M., Smirnov, A., Smy, M., Sobczyk, J.T., Sobel, H., Steinmann, J., Stewart, T., Stowell, P., Suda, Y., Suvorov, S., Suzuki, A., Suzuki, S.Y., Suzuki, Y., Tacik, R., Tada, M., Takeda, A., Takeuchi, Y., Tamura, R., Tanaka, H.K., Tanaka, H.A., Thakore, T., Thompson, L.F., Tobayama, S., Toki, W., Tsukamoto, T., Tzanov, M., Uno, W., Vagins, M., Vallari, Z., Vasseur, G., Vilela, C., Vladisavljevic, T., Wachala, T., Walker, J., Walter, C.W., Wang, Y., Wark, D., Wascko, M.O., Weber, A., Wendell, R., Wilking, M.J., Wilkinson, C., Wilson, J.R., Wilson, R.J., Wret, C., Yamada, Y., Yamamoto, K., Yamasu, S., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yu, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E.D., Zito, M., Zykova, A.

    2018年07月30日, Phys.Rev.D, 98 (1), 012004 - 012004, 英語

    [査読有り]

    研究論文(学術雑誌)

  • H. Rokujo et al.

    Oxford University Press (OUP), 2018年06月01日, Prog. Theor. Exp. Phys., 2018 (6), 063H01

    [査読有り]

    研究論文(学術雑誌)

  • N. Agafonova et al.

    American Physical Society (APS), 2018年05月22日, Phys. Rev. Lett., 120 (21), 211801

    [査読有り]

    研究論文(学術雑誌)

  • Abe, K., Amey, J., Andreopoulos, C., Antonova, M., Aoki, S., Ariga, A., Ashida, Y., Assylbekov, S., Autiero, D., Ban, S., Barbi, M., Barker, G.J., Barr, G., Barry, C., Bartet-Friburg, P., Batkiewicz, M., Berardi, V., Berkman, S., Bhadra, S., Bienstock, S., Blondel, A., Bolognesi, S., Bordoni, S., Boyd, S.B., Brailsford, D., Bravar, A., Bronner, C., Buizza Avanzini, M., Calland, R.G., Campbell, T., Cao, S., Cartwright, S.L., Castillo, R., Catanesi, M.G., Cervera, A., Chappell, A., Checchia, C., Cherdack, D., Chikuma, N., Christodoulou, G., Clifton, A., Coleman, J., Collazuol, G., Coplowe, D., Cremonesi, L., Cudd, A., Dabrowska, A., De Rosa, G., Dealtry, T., Denner, P.F., Dennis, S.R., Densham, C., Dewhurst, D., Di Lodovico, F., Di Luise, S., Dolan, S., Drapier, O., Duffy, K.E., Dumarchez, J., Dunkman, M., Dunne, P., Dziewiecki, M., Emery-Schrenk, S., Ereditato, A., Feusels, T., Finch, A.J., Fiorentini, G.A., Friend, M., Fujii, Y., Fukuda, D., Fukuda, Y., Furmanski, A.P., Galymov, V., Garcia, A., Giffin, S.G., Giganti, C., Gilje, K., Gizzarelli, F., Golan, T., Gonin, M., Grant, N., Hadley, D.R., Haegel, L., Haigh, J.T., Hamilton, P., Hansen, D., Harada, J., Hara, T., Hartz, M., Hasegawa, T., Hastings, N.C., Hayashino, T., Hayato, Y., Helmer, R.L., Hierholzer, M., Hillairet, A., Himmel, A., Hiraki, T., Hiramoto, A., Hirota, S., Hogan, M., Holeczek, J., Hosomi, F., Huang, K., Ichikawa, A.K., Ieki, K., Ikeda, M., Imber, J., Insler, J., Intonti, R.A., Irvine, T.J., Ishida, T., Ishii, T., Iwai, E., Iwamoto, K., Izmaylov, A., Jacob, A., Jamieson, B., Jiang, M., Johnson, S., Jo, J.H., Jonsson, P., Jung, C.K., Kabirnezhad, M., Kaboth, A.C., Kajita, T., Kakuno, H., Kameda, J., Karlen, D., Karpikov, I., Katori, T., Kearns, E., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kim, H., Kim, J., King, S., Kisiel, J., Knight, A., Knox, A., Kobayashi, T., Koch, L., Koga, T., Koller, P.P., Konaka, A., Kondo, K., Kopylov, A., Kormos, L.L., Korzenev, A., Koshio, Y., Kowalik, K., Kropp, W., Kudenko, Y., Kurjata, R., Kutter, T., Lagoda, J., Lamont, I., Lamoureux, M., Larkin, E., Lasorak, P., Laveder, M., Lawe, M., Lazos, M., Licciardi, M., Lindner, T., Liptak, Z.J., Litchfield, R.P., Li, X., Longhin, A., Lopez, J.P., Lou, T., Ludovici, L., Lu, X., Magaletti, L., Mahn, K., Malek, M., Manly, S., Maret, L., Marino, A.D., Marteau, J., Martin, J.F., Martins, P., Martynenko, S., Maruyama, T., Matveev, V., Mavrokoridis, K., Ma, W.Y., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K.S., McGrew, C., Mefodiev, A., Metelko, C., Mezzetto, M., Mijakowski, P., Minamino, A., Mineev, O., Mine, S., Missert, A., Miura, M., Moriyama, S., Morrison, J., Mueller, Th.A., Murphy, S., Myslik, J., Nakadaira, T., Nakahata, M., Nakamura, K.G., Nakamura, K., Nakamura, K.D., Nakanishi, Y., Nakayama, S., Nakaya, T., Nakayoshi, K., Nantais, C., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., Novella, P., Nowak, J., O'Keeffe, H.M., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S.M., Ovsyannikova, T., Owen, R.A., Oyama, Y., Palladino, V., Palomino, J.L., Paolone, V., Patel, N.D., Paudyal, P., Pavin, M., Payne, D., Perkin, J.D., Petrov, Y., Pickard, L., Pickering, L., Pinzon Guerra, E.S., Pistillo, C., Popov, B., Posiadala-Zezula, M., Poutissou, J.-M., Poutissou, R., Pritchard, A., Przewlocki, P., Quilain, B., Radermacher, T., Radicioni, E., Ratoff, P.N., Ravonel, M., Rayner, M.A., Redij, A., Reinherz-Aronis, E., Riccio, C., Rojas, P., Rondio, E., Rossi, B., Roth, S., Rubbia, A., Ruggeri, A.C., Rychter, A., Sacco, R., Sakashita, K., Sánchez, F., Sato, F., Scantamburlo, E., Scholberg, K., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shah, R., Shaikhiev, A., Shaker, F., Shaw, D., Shiozawa, M., Shirahige, T., Short, S., Smy, M., Sobczyk, J.T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Stewart, T., Stowell, P., Suda, Y., Suvorov, S., Suzuki, A., Suzuki, K., Suzuki, S.Y., Suzuki, Y., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tamura, R., Tanaka, H.K., Tanaka, H.A., Terhorst, D., Terri, R., Thakore, T., Thompson, L.F., Tobayama, S., Toki, W., Tomura, T., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Vacheret, A., Vagins, M., Vallari, Z., Vasseur, G., Vilela, C., Vladisavljevic, T., Wachala, T., Wakamatsu, K., Walter, C.W., Wark, D., Warzycha, W., Wascko, M.O., Weber, A., Wendell, R., Wilkes, R.J., Wilking, M.J., Wilkinson, C., Wilson, J.R., Wilson, R.J., Wret, C., Yamada, Y., Yamamoto, K., Yamamoto, M., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yoo, J., Yoshida, K., Yuan, T., Yu, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E.D., Zito, M., Żmuda, J.

    2018年02月03日, Phys.Rev.D, 97 (3), 032002 - 032002, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Final results of the search for νμ→νe oscillations with the OPERA detector in the CNGS beam

    N. Agafonova et al.

    2018年01月24日, JHEP, 2018 (6), 151

    [査読有り]

  • Abe, K., Amey, J., Andreopoulos, C., Antonova, M., Aoki, S., Ariga, A., Ashida, Y., Ban, S., Barbi, M., Barker, G.J., Barr, G., Barry, C., Batkiewicz, M., Berardi, V., Berkman, S., Bhadra, S., Bienstock, S., Blondel, A., Bolognesi, S., Bordoni, S., Boyd, S.B., Brailsford, D., Bravar, A., Bronner, C., Buizza Avanzini, M., Calland, R.G., Campbell, T., Cao, S., Cartwright, S.L., Catanesi, M.G., Cervera, A., Chappell, A., Checchia, C., Cherdack, D., Chikuma, N., Christodoulou, G., Coleman, J., Collazuol, G., Coplowe, D., Cudd, A., Dabrowska, A., De Rosa, G., Dealtry, T., Denner, P.F., Dennis, S.R., Densham, C., Di Lodovico, F., Dolan, S., Drapier, O., Duffy, K.E., Dumarchez, J., Dunne, P., Emery-Schrenk, S., Ereditato, A., Feusels, T., Finch, A.J., Fiorentini, G.A., Friend, M., Fujii, Y., Fukuda, D., Fukuda, Y., Garcia, A., Giganti, C., Gizzarelli, F., Golan, T., Gonin, M., Hadley, D.R., Haegel, L., Haigh, J.T., Hansen, D., Harada, J., Hartz, M., Hasegawa, T., Hastings, N.C., Hayashino, T., Hayato, Y., Hillairet, A., Hiraki, T., Hiramoto, A., Hirota, S., Hogan, M., Holeczek, J., Hosomi, F., Huang, K., Ichikawa, A.K., Ikeda, M., Imber, J., Insler, J., Intonti, R.A., Ishida, T., Ishii, T., Iwai, E., Iwamoto, K., Izmaylov, A., Jamieson, B., Jiang, M., Johnson, S., Jonsson, P., Jung, C.K., Kabirnezhad, M., Kaboth, A.C., Kajita, T., Kakuno, H., Kameda, J., Karlen, D., Katori, T., Kearns, E., Khabibullin, M., Khotjantsev, A., Kim, H., Kim, J., King, S., Kisiel, J., Knight, A., Knox, A., Kobayashi, T., Koch, L., Koga, T., Koller, P.P., Konaka, A., Kormos, L.L., Koshio, Y., Kowalik, K., Kudenko, Y., Kurjata, R., Kutter, T., Lagoda, J., Lamont, I., Lamoureux, M., Lasorak, P., Laveder, M., Lawe, M., Licciardi, M., Lindner, T., Liptak, Z.J., Litchfield, R.P., Li, X., Longhin, A., Lopez, J.P., Lou, T., Ludovici, L., Lu, X., Magaletti, L., Mahn, K., Malek, M., Manly, S., Maret, L., Marino, A.D., Martin, J.F., Martins, P., Martynenko, S., Maruyama, T., Matveev, V., Mavrokoridis, K., Ma, W.Y., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K.S., McGrew, C., Mefodiev, A., Metelko, C., Mezzetto, M., Minamino, A., Mineev, O., Mine, S., Missert, A., Miura, M., Moriyama, S., Morrison, J., Mueller, Th.A., Nakadaira, T., Nakahata, M., Nakamura, K.G., Nakamura, K., Nakamura, K.D., Nakanishi, Y., Nakayama, S., Nakaya, T., Nakayoshi, K., Nantais, C., Nielsen, C., Nishikawa, K., Nishimura, Y., Novella, P., Nowak, J., O'Keeffe, H.M., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S.M., Ovsyannikova, T., Owen, R.A., Oyama, Y., Palladino, V., Palomino, J.L., Paolone, V., Patel, N.D., Paudyal, P., Pavin, M., Payne, D., Petrov, Y., Pickering, L., Pinzon Guerra, E.S., Pistillo, C., Popov, B., Posiadala-Zezula, M., Poutissou, J.-M., Pritchard, A., Przewlocki, P., Quilain, B., Radermacher, T., Radicioni, E., Ratoff, P.N., Rayner, M.A., Reinherz-Aronis, E., Riccio, C., Rondio, E., Rossi, B., Roth, S., Ruggeri, A.C., Rychter, A., Sakashita, K., Sánchez, F., Scantamburlo, E., Scholberg, K., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shah, R., Shaikhiev, A., Shaker, F., Shaw, D., Shiozawa, M., Shirahige, T., Smy, M., Sobczyk, J.T., Sobel, H., Steinmann, J., Stewart, T., Stowell, P., Suda, Y., Suvorov, S., Suzuki, A., Suzuki, S.Y., Suzuki, Y., Tacik, R., Tada, M., Takeda, A., Takeuchi, Y., Tamura, R., Tanaka, H.K., Tanaka, H.A., Thakore, T., Thompson, L.F., Tobayama, S., Toki, W., Tomura, T., Tsukamoto, T., Tzanov, M., Vagins, M., Vallari, Z., Vasseur, G., Vilela, C., Vladisavljevic, T., Wachala, T., Walter, C.W., Wark, D., Wascko, M.O., Weber, A., Wendell, R., Wilking, M.J., Wilkinson, C., Wilson, J.R., Wilson, R.J., Wret, C., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Yu, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E.D., Zito, M.

    2018年01月09日, Phys.Rev.D, 97 (1), 012001 - 012001, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Agafonova N, Aoki S, Hara T, Mizutani F, Ozaki K, Rokujo H, Shibayama E, Takahashi S

    The OPERA experiment was designed to search for νμ→ ντ oscillations in appearance mode through the direct observation of tau neutrinos in the CNGS neutrino beam. In this paper, we report a study of the multiplicity of charged particles produced in charged-current neutrino interactions in lead. We present charged hadron average multiplicities, their dispersion and investigate the KNO scaling in different kinematical regions. The results are presented in detail in the form of tables that can be used in the validation of Monte Carlo generators of neutrino–lead interactions.

    Springer New York LLC, 2018年01月01日, Eur. Phys. J. C, 78 (1), P05011, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe K, Aoki S, Hara T, Suzuki A, Takeuchi Y, Yano. T

    2017年11月21日, Phys. Rev. D, 96 (9), 092006 - 092006, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe K, Aoki S, Hara T, Suzuki A, Takeuchi Y, Yano. T

    2017年09月05日, Phys. Rev. D, 96 (5), 052001 - 052001, 英語

    [査読有り]

    研究論文(学術雑誌)

  • G. Galati, N. Agafonova, A. Aleksandrov, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, D. Bender, A. Bertolin, I. Bodnarchuk, C. Bozza, R. Brugnera, A. Buonaura, S. Buontempo, B. Büttner, M. Chernyavskiy, A. Chukanov, L. Consiglio, N. D'Ambrosio, G. De Lellis, M. De Serio, P. Del Amo Sanchez, A. Di Crescenzo, D. Di Ferdinando, N. Di Marco, S. Dmitrievski, M. Dracos, D. Duchesneau, S. Dusini, T. Dzhatdoev, J. Ebert, A. Ereditato, R. A. Fini, F. Fornari, T. Fukuda, A. Garfagnini, J. Goldberg, Y. Gornushkin, G. Grella, A. M. Guler, C. Gustavino, C. Hagner, T. Hara, H. Hayakawa, A. Hollnagel, B. Hosseini, K. Ishiguro, K. Jakovcic, C. Jollet, C. Kamiscioglu, M. Kamiscioglu, S. H. Kim, N. Kitagawa, B. Klicek, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, F. Laudisio, A. Lauria, A. Ljubicic, A. Longhin, P. F. Loverre, M. Malenica, A. Malgin, G. Mandrioli, T. Matsuo, V. Matveev, N. Mauri, E. Medinaceli, A. Meregaglia, S. Mikado, M. Miyanishi, F. Mizutani, P. Monacelli, M. C. Montesi, K. Morishima, M. T. Muciaccia, N. Naganawa, T. Naka, M. Nakamura, T. Nakano, K. Niwa, S. Ogawa, T. Omura, K. Osaki, A. Paoloni, L. Paparella, B. D. Park, L. Pasqualini, A. Pastore, L. Patrizii, H. Pessard, D. Podgrudkov, N. Polukhina, M. Pozzato, F. Pupilli, M. Roda, T. Roganova, H. Rokujo, G. Rosa, O. Ryazhskaya, O. Sato, A. Schembri, I. Shakirianova, T. Shchedrina, A. Sheshukov, E. Shibayama, H. Shibuya, T. Shiraishi, G. Shoziyoev, S. Simone, C. Sirignano, G. Sirri, A. Sotnikov, M. Spinetti, L. Stanco, N. Starkov, S. M. Stellacci, M. Stipcevic, P. Strolin, S. Takahashi, M. Tenti, F. Terranova, V. Tioukov, S. Vasina, P. Vilain, E. Voevodina, L. Votano, J. L. Vuilleumier, G. Wilquet, C. S. Yoon

    The OPERA experiment reached its main goal by proving the appearance of vτ in the CNGS vμ beam. Five vτ candidates were detected with a S/B ratio of ∼ 10, allowing to reject the null hypothesis at 5.1σ. The search has been extended by loosening the selection criteria in order to improve the statistical uncertainty. One of the vτ candidates selected with the new strategy shows a double vertex topology and, after a dedicated multivariate analysis, is compatible with being a vTτ interaction with charm production. Based on the enlarged data sample the estimation of Δm223 in appearance mode is being performed. The search for ve interactions has been extended over the full data set with a more than twofold increase in statistics: data are compatible with the non-oscillation hypothesis in the three-flavour mixing model. The implications of the electron neutrino sample in the framework of the 3+1 sterile mode will lead to exclusion limits on sin2 2θμe. Finally, the analysis of the annual modulation of cosmic muons is introduced.

    Editrice Compositori s.r.l., 2017年09月01日, Nuovo Cimento della Societa Italiana di Fisica C, 40 (5), 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe, K., Amey, J., Andreopoulos, C., Antonova, M., Aoki, S., Ariga, A., Ashida, Y., Autiero, D., Ban, S., Barbi, M., Barker, G.J., Barr, G., Barry, C., Bartet-Friburg, P., Batkiewicz, M., Berardi, V., Berkman, S., Bhadra, S., Bienstock, S., Blondel, A., Bolognesi, S., Bordoni, S., Boyd, S.B., Brailsford, D., Bravar, A., Bronner, C., Buizza Avanzini, M., Calland, R.G., Campbell, T., Cao, S., Cartwright, S.L., Catanesi, M.G., Cervera, A., Chappell, A., Checchia, C., Cherdack, D., Chikuma, N., Christodoulou, G., Clifton, A., Coleman, J., Collazuol, G., Coplowe, D., Cudd, A., Dabrowska, A., De Rosa, G., Dealtry, T., Denner, P.F., Dennis, S.R., Densham, C., Dewhurst, D., Di Lodovico, F., Dolan, S., Drapier, O., Duffy, K.E., Dumarchez, J., Dunne, P., Dziewiecki, M., Emery-Schrenk, S., Ereditato, A., Feusels, T., Finch, A.J., Fiorentini, G.A., Friend, M., Fujii, Y., Fukuda, D., Fukuda, Y., Galymov, V., Garcia, A., Giganti, C., Gizzarelli, F., Golan, T., Gonin, M., Hadley, D.R., Haegel, L., Haigh, J.T., Hansen, D., Harada, J., Hartz, M., Hasegawa, T., Hastings, N.C., Hayashino, T., Hayato, Y., Helmer, R.L., Hillairet, A., Hiraki, T., Hiramoto, A., Hirota, S., Hogan, M., Holeczek, J., Hosomi, F., Huang, K., Ichikawa, A.K., Ikeda, M., Imber, J., Insler, J., Intonti, R.A., Ishida, T., Ishii, T., Iwai, E., Iwamoto, K., Izmaylov, A., Jamieson, B., Jiang, M., Johnson, S., Jonsson, P., Jung, C.K., Kabirnezhad, M., Kaboth, A.C., Kajita, T., Kakuno, H., Kameda, J., Karlen, D., Katori, T., Kearns, E., Khabibullin, M., Khotjantsev, A., Kim, H., Kim, J., King, S., Kisiel, J., Knight, A., Knox, A., Kobayashi, T., Koch, L., Koga, T., Koller, P.P., Konaka, A., Kormos, L.L., Korzenev, A., Koshio, Y., Kowalik, K., Kropp, W., Kudenko, Y., Kurjata, R., Kutter, T., Lagoda, J., Lamont, I., Lamoureux, M., Larkin, E., Lasorak, P., Laveder, M., Lawe, M., Licciardi, M., Lindner, T., Liptak, Z.J., Litchfield, R.P., Li, X., Longhin, A., Lopez, J.P., Lou, T., Ludovici, L., Lu, X., Magaletti, L., Mahn, K., Malek, M., Manly, S., Maret, L., Marino, A.D., Martin, J.F., Martins, P., Martynenko, S., Maruyama, T., Matveev, V., Mavrokoridis, K., Ma, W.Y., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K.S., McGrew, C., Mefodiev, A., Metelko, C., Mezzetto, M., Mijakowski, P., Minamino, A., Mineev, O., Mine, S., Missert, A., Miura, M., Moriyama, S., Morrison, J., Mueller, Th.A., Myslik, J., Nakadaira, T., Nakahata, M., Nakamura, K.G., Nakamura, K., Nakamura, K.D., Nakanishi, Y., Nakayama, S., Nakaya, T., Nakayoshi, K., Nantais, C., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., Novella, P., Nowak, J., O'Keeffe, H.M., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S.M., Ovsyannikova, T., Owen, R.A., Oyama, Y., Palladino, V., Palomino, J.L., Paolone, V., Patel, N.D., Paudyal, P., Pavin, M., Payne, D., Perkin, J.D., Petrov, Y., Pickard, L., Pickering, L., Pinzon Guerra, E.S., Pistillo, C., Popov, B., Posiadala-Zezula, M., Poutissou, J.-M., Poutissou, R., Pritchard, A., Przewlocki, P., Quilain, B., Radermacher, T., Radicioni, E., Ratoff, P.N., Ravonel, M., Rayner, M.A., Redij, A., Reinherz-Aronis, E., Riccio, C., Rondio, E., Rossi, B., Roth, S., Rubbia, A., Ruggeri, A.C., Rychter, A., Sakashita, K., Sánchez, F., Scantamburlo, E., Scholberg, K., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shah, R., Shaikhiev, A., Shaker, F., Shaw, D., Shiozawa, M., Shirahige, T., Short, S., Smy, M., Sobczyk, J.T., Sobel, H., Sorel, M., Southwell, L., Steinmann, J., Stewart, T., Stowell, P., Suda, Y., Suvorov, S., Suzuki, A., Suzuki, S.Y., Suzuki, Y., Tacik, R., Tada, M., Takeda, A., Takeuchi, Y., Tamura, R., Tanaka, H.K., Tanaka, H.A., Terhorst, D., Terri, R., Thakore, T., Thompson, L.F., Tobayama, S., Toki, W., Tomura, T., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Vagins, M., Vallari, Z., Vasseur, G., Vilela, C., Vladisavljevic, T., Wachala, T., Walter, C.W., Wark, D., Wascko, M.O., Weber, A., Wendell, R., Wilkes, R.J., Wilking, M.J., Wilkinson, C., Wilson, J.R., Wilson, R.J., Wret, C., Yamada, Y., Yamamoto, K., Yamamoto, M., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yoshida, K., Yuan, T., Yu, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E.D., Zito, M., Zmuda, J.

    2017年07月31日, Phys.Rev.D, 96 (1), 011102 - 011102, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe, Ko, Amey, Josh, Andreopoulos, Costas, Antonova, Maria, Aoki, Shigeki, Ariga, Akitaka, Assylbekov, Shamil, Autiero, Dario, Ban, Sei, Barbato, Felicia C T, Barbi, Mauricio, Barker, Gary J, Barr, Giles, Barry, Christopher, Bartet-Friburg, Pierre, Batkiewicz, Marcela, Berardi, Vincenzo, Berkman, Sophie, Bhadra, Sampa, Bienstock, Simon, Blondel, Alain, Bolognesi, Sara, Bordoni, Stefania, Boyd, Steve B, Brailsford, Dominic, Bravar, Alessandro, Bronner, Christophe, Buizza Avanzini, Margherita, Calland, Richard Graham, Campbell, Thomas, Cao, Son, Cartwright, Susan L, Castillo, Raquel, Catanesi, Maria Gabriella, Cervera, Anselmo, Andrew Chappell, Checchia, Caterina, Cherdack, Daniel, Chikuma, Naruhiro, Christodoulou, Georgios, Clifton, Alex, Coleman, Jonathon, Collazuol, Gianmaria, Coplowe, David, Cremonesi, Linda, Cudd, Andrew, Dabrowska, Anna, De Rosa, Gianfranca, Dealtry, Thomas, Denner, Paula F, Dennis, Stephen R, Densham, Chris, Dewhurst, Debra, Di Lodovico, Francesca, Di Luise, Silvestro, Dolan, Stephen, Drapier, Olivier, Duffy, Kirsty E, Dumarchez, Jacques, Dunkman, Matt, Dziewiecki, Michal, Emery-Schrenk, Sandrine, Ereditato, Antonio, Feusels, Tom, Finch, Alexander J, Fiorentini, G A, Friend, Megan, Fujii, Yoshiaki, Fukuda, Daisuke, Fukuda, Yoshiyuki, Furmanski, Andrew P, Galymov, Vyacheslav, Garcia, Alfonso, Giffin, Spencer G, Giganti, Claudio, Gizzarelli, Francesco, Golan, Tomasz, Gonin, Michel, Grant, Nick, Hadley, David R, Haegel, Leïla, Haigh, Jennifer T, Hamilton, Pip, Hansen, Damon, Harada, Jun, Hara, Toshio, Hartz, Mark, Hasegawa, Takuya, Hastings, Nicholas C, Hayashino, Tatsuya, Hayato, Yoshinari, Helmer, Richard L, Hierholzer, Martin, Hillairet, Anthony, Himmel, Alexander, Hiraki, Takahiro, Hiramoto, Ayami, Hirota, Seiko, Hogan, Matthew, Holeczek, Jacek, Hosomi, Fuminao, Huang, Kunxian, Ichikawa, Atsuko K, Ieki, Kei, Ikeda, Motoyasu, Imber, James, Insler, Jonathan, Intonti, Rosaria Annalisa, Irvine, Tristan James, Ishida, Taku, Ishii, Takanobu, Iwai, Eito, Iwamoto, Konosuke, Izmaylov, Alexander, Jacob, Abraham, Jamieson, Blair, Jiang, Miao, Johnson, Scott, Jo, Jay Hyun, Jonsson, Per, Jung, C K, Kabirnezhad, Monireh, Kaboth, Asher C, Kajita, Takaaki, Kakuno, Hidekazu, Kameda, Jun, Karlen, Dean, Karpikov, Ivan, Katori, Teppei, Kearns, E., Khabibullin, Marat, Khotjantsev, Alexei, Kielczewska, Danuta, Kikawa, Tatsuya, Kim, Hyonil, Kim, Jiae, King, Sophie, Kisiel, Jan, Knight, Aaron, Knox, Alasdair, Kobayashi, Takashi, Koch, Lukas, Koga, Taichiro, Konaka, Akira, Kondo, Keisuke, Kopylov, Artem, Kormos, Laura L, Korzenev, Alexander, Koshio, Yusuke, Kowalik, Katarzyna, Kropp, William, Kudenko, Yury, Kurjata, Robert, Kutter, Thomas, Lagoda, Justyna, Lamont, Iain, Lamoureux, Mathieu, Larkin, Edward, Lasorak, Pierre, Laveder, Marco, Lawe, Matthew, Lazos, Michail, Licciardi, Matthieu, Lindner, Thomas, Liptak, Zachary J, Litchfield, R Phillip, Li, Xiaoyue, Longhin, Andrea, Lopez, Jeremy P, Lou, Tianmeng, Ludovici, Lucio, Lu, Xianguo, Magaletti, Lorenzo, Mahn, Kendall, Malek, Matthew, Manly, Steven, Maret, Lucie, Marino, Alysia D, Marteau, Jacques, Martin, J F, Martins, Paul, Martynenko, Sergey, Maruyama, Takasumi, Matveev, Victor, Mavrokoridis, Konstantinos, Ma, Wing Y, Mazzucato, Edoardo, McCarthy, Mark, McCauley, Neil, McFarland, Kevin S, McGrew, Clark, Mefodiev, Alexander, Metelko, Carl, Mezzetto, Mauro, Mijakowski, Piotr, Minamino, Akihiro, Mineev, Oleg, Mine, Shunichi, Missert, Andrew, Miura, Makoto, Moriyama, Shigetaka, Morrison, Jacob, Mueller, Th A, Murphy, Sebastien, Myslik, Jordan, Nakadaira, Takeshi, Nakahata, Masayuki, Nakamura, Keigo G, Nakamura, Kenzo, Nakamura, Kiseki D, Nakanishi, Yoshie, Nakayama, Shoei, Nakaya, Tsuyoshi, Nakayoshi, Kazuo, Nantais, Corina, Nielsen, Christine, Nirkko, Martti, Nishikawa, Koichiro, Nishimura, Yasuhiro, Novella, Pau, Nowak, Jaroslaw, O'Keeffe, Helen M, Ohta, Ryosuke, Okumura, Kimihiro, Okusawa, Toru, Oryszczak, Wojciech, Oser, Scott M, Ovsyannikova, Tatiana, Owen, R A, Oyama, Yuichi, Palladino, Vittorio, Palomino, Jose L, Paolone, Vittorio, Patel, Nikhul D, Paudyal, Pratiksha, Pavin, Matej, Payne, David, Perkin, Jonathan D, Petrov, Yevgeniy, Pickard, Leon, Pickering, Luke, Pinzon Guerra, Elder Sebastian, Pistillo, Ciro, Popov, Boris, Posiadala-Zezula, Magdalena, Poutissou, Jean-Michel, Poutissou, Renee, Przewlocki, Pawel, Quilain, Benjamin, Radermacher, Thomas, Radicioni, Emilio, Ratoff, Peter N, Ravonel, Melody, Rayner, Mark A, Redij, Asmita, Reinherz-Aronis, Erez, Riccio, Ciro, Rojas, Paul, Rondio, Ewa, Rossi, Biagio, Roth, Stefan, Rubbia, Andre, Ruggeri, Alan C, Rychter, Andrzej, Sacco, Roberto, Sakashita, Ken, Sánchez, Federico, Sato, Fumitaka, Scantamburlo, Enrico, Scholberg, Kate, Schwehr, Jaclyn, Scott, Mark, Seiya, Yoshihiro, Sekiguchi, Tetsuro, Sekiya, Hiroyuki, Sgalaberna, Davide, Shah, Raj, Shaikhiev, Artur, Shaker, Fady, Shaw, Dave, Shiozawa, Masato, Shirahige, Tetsuya, Short, Samantha, Smy, Michael, Sobczyk, Jan T, Sobel, Henry, Sorel, Michel, Southwell, Luke, Stamoulis, Panos, Steinmann, Jochen, Stewart, Trevor, Stowell, Patrick, Suda, Yusuke, Suvorov, Sergey, Suzuki, Atsumu, Suzuki, Kento, Suzuki, Soh Y, Suzuki, Yoichiro, Tacik, Roman, Tada, Masaru, Takahashi, Shota, Takeda, Atsushi, Takeuchi, Yasuo, Tamura, Riku, Tanaka, Hide K, Tanaka, Hirohisa A, Terhorst, Dennis, Terri, Ryan, Thakore, Tarak, Thompson, Lee F, Tobayama, Shimpei, Toki, Walter, Tomura, Tomonobu, Touramanis, Christos, Tsukamoto, Toshifumi, Tzanov, Martin, Uchida, Yoshi, Vacheret, Antonin, Vagins, Mark, Vallari, Zoya, Vasseur, Georges, Vilela, Cristovao, Vladisavljevic, Tomislav, Wachala, Tomasz, Wakamatsu, Keiju, Walter, C W, Wark, David, Warzycha, Weronika, Wascko, Morgan O, Weber, Alfons, Wendell, Roger, Wilkes, R Jeffrey, Wilking, Michael J, Wilkinson, Callum, Wilson, Jeanne R, Wilson, Robert J, Wret, Clarence, Yamada, Yoshikazu, Yamamoto, Kazuhiro, Yamamoto, Mika, Yanagisawa, C, Yano, Takatomi, Yen, Stanley, Yershov, Nikolai, Yokoyama, Masashi, Yoo, Jieun, Yoshida, Kento, Yuan, Tianlu, Yu, Mitchell, Zalewska, Agnieszka, Zalipska, Joanna, Zambelli, Laura, Zaremba, Krzysztof, Ziembicki, Marcin, Zimmerman, E D, Zito, Marco, Zmuda, Jakub

    2017年06月29日, Phys.Rev.D, 95 (11), 111101 - 111101, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Atsushi Iyono, Saya Yamamoto, Shigeki Aoki, Toshio Hara, Kenji Kuretsubo, Toshitsugu Marushima, Haruka Matsumoto, Fukashi Mizutani, Keita Ozaki, Emi Shibayama, Atsumu Suzuki, Satoru Takahashi, Yurie Tateishi, Misato Yabu, Kyohei Yamada, Koichi Kodama, Kaname Hamada, Hiroaki Kawahara, Ryosuke Komatani, Masahiro Komatsu, Motoaki Miyanishi, Misaki Morishita, Kunihiro Morishima, Mitsuhiro Nakamura, Naotaka Naganawa, Toshiyuki Nanano, Akira Nishio, Kimio Niwa, Naoto Otsuka, Hiroki Rokujo, Osamu Sato, Masahiro Yoshimoto

    Nuclear emulsion plates for studying elementary particle physics as well as cosmic ray physics are very powerful tracking tools with sub-micron spatial resolutions of charged particle trajectories. Even if gamma rays have to be detected, electron-positron pair tracks can provide precise information to reconstruct their direction and energy with high accuracy. Recent developments of emulsion analysis technology can digitally handle almost all tracks recorded in emulsion plates by using the Hyper Track Selector of the OPERA group at NAGOYA University. On the other hand, the potential of time resolutions have been equipped by emulsion multilayer shifter technology in the GRAINE (Gamma Ray Astro-Imager with Nuclear Emulsion) experiments, the aims of which are to detect cosmic gamma rays such as the Vela pulsar stellar object by precise emulsion tracking analysis and to study cosmic ray particle interactions and chemical compositions. In this paper, we focus on the subject of cosmic ray nuclei detection in the GRAINE balloon flight experiments launched at Alice Springs, Australia in May 2015.

    EDP Sciences, 2017年06月26日, EPJ Web of Conferences, 145, 英語

    [査読有り]

    研究論文(国際会議プロシーディングス)

  • T. Fukuda, S. Aoki, S. Cao, N. Chikuma, Y. Fukuzawa, M. Gonin, T. Hayashino, Y. Hayato, A. Hiramoto, F. Hosomi, K. Ishiguro, S. Iori, T. Inoh, H. Kawahara, H. Kim, N. Kitagawa, T. Koga, R. Komatani, M. Komatsu, A. Matsushita, S. Mikado, A. Minamino, H. Mizusawa, K. Morishima, T. Matsuo, T. Matsumoto, Y. Morimoto, M. Morishita, K. Nakamura, M. Nakamura, Y. Nakamura, N. Naganawa, T. Nakano, T. Nakaya, Y. Nakatsuka, A. Nishio, S. Ogawa, H. Oshima, B. Quilain, H. Rokujo, O. Sato, Y. Seiya, H. Shibuya, T. Shiraishi, Y. Suzuki, S. Tada, S. Takahashi, K. Yamada, M. Yoshimoto, M. Yokoyama

    Precise neutrino-nucleus interaction measurements in the sub-multi-GeV region are important to reduce the systematic uncertainty in future neutrino oscillation experiments. Furthermore, an excess of.e interactions, as a possible interpretation of the existence of a sterile neutrino, has been observed in such an energy region. The nuclear emulsion technique can measure all the final state particles with low energy threshold for a variety of targets (Fe, C, H2O, and so on). Its subam position resolution allows measurements of the.e cross-section with good electron/gamma separation capability. We started a new experiment at J-PARC to study sub-multi-GeV neutrino interactions by introducing the nuclear emulsion technique. The J-PARC T60 experiment has been implemented as a first step in such a project. Systematic neutrino event analysis with full scanning data in the nuclear emulsion detector was performed for the first time. The first neutrino event detection and its analysis are described in this paper.

    OXFORD UNIV PRESS INC, 2017年06月01日, PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, 2017 (6), 063C02, 英語

    [査読有り]

    研究論文(学術雑誌)

  • K. Yamada, S. Aoki, S. Cao, N. Chikuma, T. Fukuda, Y. Fukuzawa, M. Gonin, T. Hayashino, Y. Hayato, A. Hiramoto, F. Hosomi, T. Inoh, S. Iori, K. Ishiguro, H. Kawahara, H. Kim, N. Kitagawa, T. Koga, R. Komatani, M. Komatsu, A. Matsushita, S. Mikado, A. Minamino, H. Mizusawa, T. Matsumoto, T. Matsuo, Y. Morimoto, K. Morishima, M. Morishita, N. Naganawa, K. Nakamura, M. Nakamura, Y. Nakamura, T. Nakano, Y. Nakatsuka, T. Nakaya, A. Nishio, S. Ogawa, H. Oshima, B. Quilain, H. Rokujo, O. Sato, Y. Seiya, H. Shibuya, T. Shiraishi, Y. Suzuki, S. Tada, S. Takahashi, M. Yokoyama, M. Yoshimoto

    We describe the first ever implementation of a clock-based, multi-stage emulsion shifter in an accelerator neutrino experiment. The system was installed in the neutrino monitoring building at the Japan Proton Accelerator Research Complex as part of a test experiment, T60, and stable operation was maintained for a total of 126.6 days. By applying time information to emulsion films, various results were obtained. Time resolutions of 5.3-14.7 s were evaluated in an operation spanning 46.9 days ( yielding division numbers of 1.4-3.8x10(5)). By using timing and spatial information, reconstruction of coincident events consisting of high-multiplicity and vertex-contained events, including neutrino events, was performed. Emulsion events were matched to events observed by INGRID, one of the on-axis near detectors of the T2K experiment, with high reliability 98.5%), and hybrid analysis of the emulsion and INGRID events was established by means of the multi-stage shifter. The results demonstrate that the multi-stage shifter can feasibly be used in neutrino experiments.

    OXFORD UNIV PRESS INC, 2017年06月01日, PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, 2017 (6), 063H02, 英語

    [査読有り]

    研究論文(学術雑誌)

  • A. Akmete, A. Alexandrov, A. Anokhina, S. Aoki, E. Atkin, N. Azorskiy, J. J. Back, A. Bagulya, A. Baranov, G. J. Barker, A. Bay, V. Bayliss, G. Bencivenni, A. Y. Berdnikov, Y. A. Berdnikov, M. Bertani, C. Betancourt, I. Bezshyiko, O. Bezshyyko, D. Bick, S. Bieschke, A. Blanco, J. Boehm, M. Bogomilov, K. Bondarenko, W. M. Bonivento, A. Boyarsky, R. Brenner, D. Breton, R. Brundler, M. Bruschi, V. Buscher, A. Buonaura, S. Buontempo, S. Cadeddu, A. Calcaterra, M. Campanelli, J. Chauveau, A. Chepurnov, M. Chernyavsky, K. -Y. Choi, A. Chumakov, P. Ciambrone, G. M. Dallavalle, N. D'Ambrosio, G. D'Appollonio, G. De Lellis, A. De Roeck, M. De Serio, L. Dedenko, A. Di Crescenzo, N. Di Marco, C. Dib, H. Dijkstra, V. Dmitrenko, D. Domenici, S. Donskov, A. Dubreuil, J. Ebert, T. Enik, A. Etenko, F. Fabbri, L. Fabbri, O. Fedin, G. Fedorova, G. Felici, M. Ferro-Luzzi, R. A. Fini, P. Fonte, C. Franco, T. Fukuda, G. Galati, G. Gavrilov, S. Gerlach, L. Golinka-Bezshyyko, D. Golubkov, A. Golutvin, D. Gorbunov, S. Gorbunov, V. Gorkavenko, Y. Gornushkin, M. Gorshenkov, V. Grachev, E. Graverini, V. Grichine, A. M. Guler, Yu. Guz, C. Hagner, H. Hakobyan, E. van Herwijnen, A. Hollnagel, B. Hosseini, M. Hushchyn, G. Iaselli, A. Iuliano, R. Jacobsson, M. Jonker, I. Kadenko, C. Kamiscioglu, M. Kamiscioglu, M. Khabibullin, G. Khaustov, A. Khotyantsev, S. H. Kim, V. Kim, Y. G. Kim, N. Kitagawa, J. -W. Ko, K. Kodama, A. Kolesnikov, D. I. Kolev, V. Kolosov, M. Komatsu, N. Konovalova, M. A. Korkmaz, I. Korol, I. Korol'ko, A. Korzenev, S. Kovalenko, I. Krasilnikova, K. Krivova, Y. Kudenko, V. Kurochka, E. Kuznetsova, H. M. Lacker, A. Lai, G. Lanfranchi, O. Lantwin, A. Lauria, H. Lebbolo, K. Y. Lee, J. -M. Levy, L. Lopes, V. Lyubovitskij, J. Maalmi, A. Magnan, V. Maleev, A. Malinin, A. Mefodev, P. Mermod, S. Mikado, Yu. Mikhaylov, D. A. Milstead, O. Mineev, A. Montanari, M. C. Montesi, K. Morishima, S. Movchan, N. Naganawa, M. Nakamura, T. Nakano, A. Novikov, B. Obinyakov, S. Ogawa, N. Okateva, P. H. Owen, A. Paoloni, B. D. Park, L. Paparella, A. Pastore, M. Patel, D. Pereyma, D. Petrenko, K. Petridis, D. Podgrudkov, V. Poliakov, N. Polukhina, M. Prokudin, A. Prota, A. Rademakers, F. Ratnikov, T. Rawlings, M. Razeti, F. Redi, S. Ricciardi, T. Roganova, A. Rogozhnikov, H. Rokujo, G. Rosa, T. Rovelli, O. Ruchayskiy, T. Ruf, V. Samoylenko, A. Saputi, O. Sato, E. S. Savchenko, W. Schmidt-Parzefall, N. Serra, A. Shakin, M. Shaposhnikov, P. Shatalov, T. Shchedrina, L. Shchutska, V. Shevchenko, H. Shibuya, A. Shustov, S. B. Silverstein, S. Simone, M. Skorokhvatov, S. Smirnov, J. Y. Sohn, A. Sokolenko, N. Starkov, B. Storaci, P. Strolin, S. Takahashi, I. Timiryasov, V. Tioukov, N. Tosi, D. Treille, R. Tsenov, S. Ulin, A. Ustyuzhanin, Z. Uteshev, G. Vankova-Kirilova, F. Vannucci, P. Venkova, S. Vilchinski, M. Villa, K. Vlasik, A. Volkov, R. Voronkov, R. Wanke, J. -K. Woo, M. Wurm, S. Xella, D. Yilmaz, A. U. Yilmazer, C. S. Yoon, Yu. Zaytsev

    The SHiP experiment is designed to search for very weakly interacting particles beyond the Standard Model which are produced in a 400 GeV/c proton beam dump at the CERN SPS. An essential task for the experiment is to keep the Standard Model background level to less than 0.1 event after 2 x 10(20) protons on target. In the beam dump, around 10(11) muons will be produced per second. The muon rate in the spectrometer has to be reduced by at least four orders of magnitude to avoid muon-induced combinatorial background. A novel active muon shield is used to magnetically deflect the muons out of the acceptance of the spectrometer. This paper describes the basic principle of such a shield, its optimization and its performance.

    IOP PUBLISHING LTD, 2017年05月17日, JOURNAL OF INSTRUMENTATION, 12 (5), P05011, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe, K., Amey, J., Constantinos Andreopoulos, Antonova, M., Aoki, S., Ariga, A., Autiero, D., Ban, S., Barbi, M., Barker, G.J., Barr, G., Barry, C., Bartet-Friburg, P., Batkiewicz, M., Vincenzo Berardi, Berkman, S., Bhadra, S., Bienstock, S., Blondel, A., Bolognesi, S., Bordoni, S., Boyd, S.B., Brailsford, D., Bravar, A., Bronner, C., Buizza Avanzini, M., Calland, R.G., Campbell, T., Cao, S., Cartwright, S.L., Catanesi, M.G., Cervera, A., Checchia, C., Daniel Cherdack, Chikuma, N., Christodoulou, G., Clifton, A., Coleman, J., Gianmaria Collazuol, Coplowe, D., Cudd, A., Dabrowska, A., Gianfranca De Rosa, Thomas James Dealtry, Denner, P.F., Dennis, S.R., Densham, C., Dewhurst, D., Di Lodovico, F., Di Luise, S., Dolan, S., Drapier, O., Duffy, K.E., Dumarchez, J., Dziewiecki, M., Emery-Schrenk, S., Ereditato, A., Feusels, T., Finch, A.J., Fiorentini, G.A., Friend, M., Fujii, Y., Fukuda, D., Fukuda, Y., Galymov, V., Garcia, A., Giganti, C., Gizzarelli, F., Golan, T., Gonin, M., Hadley, D.R., Leïla Haegel, Haigh, M.D., Hansen, D., Harada, J., Hartz, M., Hasegawa, T., Hastings, N.C., Hayashino, T., Hayato, Y., Helmer, R.L., Hillairet, A., Hiraki, T., Hiramoto, A., Hirota, S., Hogan, M., Holeczek, J., Hosomi, F., Huang, K., Ichikawa, A.K., Ikeda, M., Imber, J., Jonathan Insler, Intonti, R.A., Ishida, T., Ishii, T., Iwai, E., Iwamoto, K., Izmaylov, A., Jamieson, B., Jiang, M., Johnson, S., Jonsson, P., Jung, C.K., Kabirnezhad, M., Kaboth, A.C., Kajita, T., Hidekazu Kakuno, Kameda, J., Karlen, D., Katori, T., Kearns, E., Khabibullin, M., Khotjantsev, A., Kim, H., Kim, J., King, S., Kisiel, J., Knight, A., Knox, A., Takashi Kobayashi, Lukas Koch, Koga, T., Konaka, A., Kondo, K., Kormos, L.L., Alexander Korzenev, Koshio, Y., Kowalik, K., Kropp, W., Kudenko, Y., Kurjata, R., Kutter, T., Lagoda, J., Lamont, I., Mathieu Lamoureux, Larkin, E., Pierre Lasorak, Marco Laveder, Lawe, M., Matthieu Licciardi, Lindner, T., Liptak, Z.J., Litchfield, R.P., Li, X., Andrea Longhin, Lopez, J.P., Lou, T., Lucio Ludovici, Xianguo Lu, Lorenzo Magaletti, Mahn, K., Malek, M., Manly, S., Marino, A.D., John Martin, Martins, P., Martynenko, S., Maruyama, T., Matveev, V., Konstantinos Mavrokoridis, Ma, W.Y., Mazzucato, E., McCarthy, M., McCauley, N., Kevin McFarland, McGrew, C., Mefodiev, A., Metelko, C., Mauro Mezzetto, Mijakowski, P., Minamino, A., Mineev, O., Mine, S., Missert, A., Miura, M., Moriyama, S., Mueller, Th.A., Myslik, J., Nakadaira, T., Nakahata, M., Nakamura, K.G., Nakamura, K., Nakamura, K.D., Nakanishi, Y., Nakayama, S., Tsuyoshi NAKAYA, Nakayoshi, K., Nantais, C., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., Novella, P., Nowak, J., O'Keeffe, H.M., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S.M., Ovsyannikova, T., Owen, R.A., Oyama, Y., Vittorio Palladino, Palomino, J.L., Paolone, V., Nikhul Patel, Paudyal, P., Matej Pavin, Payne, D., Perkin, J.D., Petrov, Y., Pickard, L., Pickering, L., Pinzon Guerra, E.S., Pistillo, C., Popov, B., Posiadala-Zezula, M., Poutissou, J.-M., Poutissou, R., Przewlocki, P., Quilain, B., Radermacher, T., Emilio Radicioni, Ratoff, P.N., Ravonel, M., Rayner, M.A., Redij, A., Reinherz-Aronis, E., Ciro Riccio, Rodrigues, P.A., Rondio, E., Biagio Rossi, Stefan Roth, Rubbia, A., Rychter, A., Sakashita, K., Federico Sanchez Nieto, Scantamburlo, E., Scholberg, K., Schwehr, J., Scott, M., Yoshihiro Seiya, Tetsuro Sekiguchi, Hiroyuki Sekiya, Sgalaberna, D., Shah, R., Shaikhiev, A., Shaker, F., Shaw, D., Shiozawa, M., Shirahige, T., Short, S., Smy, M., Sobczyk, J.T., Sobel, H., Michel Sorel, Southwell, L., Steinmann, J., Stewart, T., Stowell, P., Yusuke Suda, Suvorov, S., Suzuki, A., Suzuki, S.Y., Suzuki, Y., Tacik, R., Tada, M., Takeda, A., Takeuchi, Y., Tanaka, H.K., H. A. Tanaka, Terhorst, D., Terri, R., Thakore, T., Thompson, L.F., Tobayama, S., Toki, W., Tomura, T., Christos Touramanis, Tsukamoto, T., Tzanov, M., Yoshi Uchida, Vagins, M., Vallari, Z., Vasseur, G., Tomislav Vladisavljevic, Wachala, T., Walter, C.W., Wark, D., Morgan Wascko, Alfons Weber, Wendell, R., Wilkes, R.J., Michael Wilking, Wilkinson, C., Wilson, J.R., Robert Wilson, Wret, C., Yamada, Y., Yamamoto, K., Yamamoto, M., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Masashi Yokoyama, Yoshida, K., Yuan, T., Yu, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E.D., Zito, M., Zmuda, J.

    2017年04月10日, Phys.Rev.Lett., 118 (15), 151801 - 151801, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe, K., Constantinos Andreopoulos, Antonova, M., Aoki, S., Ariga, A., Assylbekov, S., Autiero, D., Ban, S., Barbi, M., Barker, G.J., Barr, G., Bartet-Friburg, P., Batkiewicz, M., Bay, F., Vincenzo Berardi, Berkman, S., Bhadra, S., Bienstock, S., Blondel, A., Bolognesi, S., Bordoni, S., Boyd, S.B., Brailsford, D., Bravar, A., Bronner, C., Avanzini, M. Buizza, Calland, R.G., Campbell, T., Cao, S., Rodríguez, J. Caravaca, Cartwright, S.L., Castillo, R., Catanesi, M.G., Cervera, A., Daniel Cherdack, Chikuma, N., Christodoulou, G., Clifton, A., Coleman, J., Gianmaria Collazuol, Coplowe, D., Linda Cremonesi, Dabrowska, A., Gianfranca De Rosa, Thomas James Dealtry, Denner, P.F., Dennis, S.R., Densham, C., Dewhurst, D., Di Lodovico, F., Di Luise, S., Dolan, S., Drapier, O., Duffy, K.E., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery-Schrenk, S., Ereditato, A., Feusels, T., Finch, A.J., Fiorentini, G.A., Friend, M., Fujii, Y., Fukuda, D., Fukuda, Y., Andrew Furmanski, Galymov, V., Garcia, A., Giffin, S.G., Giganti, C., Gilje, K., Gizzarelli, F., Gonin, M., Grant, N., Hadley, D.R., Leïla Haegel, Haigh, M.D., Hamilton, P., Hansen, D., Harada, J., Hara, T., Hartz, M., Hasegawa, T., Hastings, N.C., Hayashino, T., Hayato, Y., Helmer, R.L., Hierholzer, M., Hillairet, A., Alexander Himmel, Hiraki, T., Hirota, S., Hogan, M., Holeczek, J., Horikawa, S., Hosomi, F., Huang, K., Ichikawa, A.K., Ieki, K., Ikeda, M., Imber, J., Jonathan Insler, Intonti, R.A., Irvine, T.J., Ishida, T., Ishii, T., Iwai, E., Iwamoto, K., Izmaylov, A., Jacob, A., Jamieson, B., Jiang, M., Johnson, S., Jay Hyun Jo, Jonsson, P., Jung, C.K., Kabirnezhad, M., Kaboth, A.C., Kajita, T., Hidekazu Kakuno, Kameda, J., Karlen, D., Karpikov, I., Katori, T., Kearns, E., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kim, H., Kim, J., King, S., Kisiel, J., Knight, A., Knox, A., Takashi Kobayashi, Lukas Koch, Koga, T., Konaka, A., Kondo, K., Kopylov, A., Kormos, L.L., Alexander Korzenev, Koshio, Y., Kropp, W., Kudenko, Y., Kurjata, R., Kutter, T., Lagoda, J., Lamont, I., Larkin, E., Pierre Lasorak, Marco Laveder, Lawe, M., Lazos, M., Lindner, T., Liptak, Z.J., Litchfield, R.P., Li, X., Andrea Longhin, Lopez, J.P., Lou, T., Lucio Ludovici, Xianguo Lu, Lorenzo Magaletti, Mahn, K., Malek, M., Manly, S., Marino, A.D., Jacques MARTEAU, John Martin, Martins, P., Martynenko, S., Maruyama, T., Matveev, V., Konstantinos Mavrokoridis, Ma, W.Y., Mazzucato, E., McCarthy, M., McCauley, N., Kevin McFarland, McGrew, C., Mefodiev, A., Metelko, C., Mauro Mezzetto, Mijakowski, P., Miller, C.A., Minamino, A., Mineev, O., Mine, S., Missert, A., Miura, M., Moriyama, S., Mueller, Th. A., Murphy, S., Myslik, J., Nakadaira, T., Nakahata, M., Nakamura, K.G., Nakamura, K., Nakamura, K.D., Nakayama, S., Tsuyoshi NAKAYA, Nakayoshi, K., Nantais, C., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., Novella, P., Nowak, J., O'Keeffe, H.M., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S.M., Ovsyannikova, T., Owen, R.A., Oyama, Y., Vittorio Palladino, Palomino, J.L., Paolone, V., Nikhul Patel, Matej Pavin, Payne, D., Perkin, J.D., Petrov, Y., Pickard, L., Pickering, L., Pinzon Guerra, E. S., Pistillo, C., Popov, B., Posiadala-Zezula, M., Poutissou, J. -M., Poutissou, R., Przewlocki, P., Quilain, B., Radermacher, T., Emilio Radicioni, Ratoff, P.N., Ravonel, M., Rayner, M.A.M., Redij, A., Reinherz-Aronis, E., Ciro Riccio, Rojas, P., Rondio, E., Stefan Roth, Rubbia, A., Rychter, A., Sacco, R., Sakashita, K., Federico Sanchez Nieto, Sato, F., Scantamburlo, E., Scholberg, K., Stefan Schoppmann, Schwehr, J., Scott, M., Yoshihiro Seiya, Tetsuro Sekiguchi, Hiroyuki Sekiya, Sgalaberna, D., Shah, R., Shaikhiev, A., Shaker, F., Shaw, D., Shiozawa, M., Shirahige, T., Short, S., Smy, M., Sobczyk, J.T., Sobel, H., Michel Sorel, Southwell, L., Stamoulis, P., Steinmann, J., Stewart, T., Stowell, P., Yusuke Suda, Suvorov, S., Suzuki, A., Suzuki, K., Suzuki, S.Y., Suzuki, Y., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H.K., H. A. Tanaka, Terhorst, D., Terri, R., Thakore, T., Thompson, L.F., Tobayama, S., Toki, W., Tomura, T., Christos Touramanis, Tsukamoto, T., Tzanov, M., Yoshi Uchida, Vacheret, A., Vagins, M., Vallari, Z., Vasseur, G., Wachala, T., Wakamatsu, K., Walter, C.W., Wark, D., Warzycha, W., Morgan Wascko, Alfons Weber, Wendell, R., Wilkes, R.J., Michael Wilking, Wilkinson, C., Wilson, J.R., Robert Wilson, Yamada, Y., Yamamoto, K., Yamamoto, M., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Masashi Yokoyama, Yoshida, K., Yuan, T., Yu, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E.D., Zito, M., Zmuda, J. .

    2017年01月26日, Phys.Rev.D, 95 (1), 012010 - 012010, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe K, Aoki S, Hara T, Suzuki A, Takeuchi Y, Yano. T

    2016年11月04日, Phys. Rev. Lett., 117 (19), 192501 - 192501, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Keita Ozaki, Satoru Takahashi, Shigeki Aoki, Keiki Kamada, Taichi Kaneyama, Ryo Nakagawa, Hiroki Rokujo

    Linear polarization of high-energy gamma-rays (10MeV-100 GeV) can be detected by measuring the azimuthal angle of electron-positron pairs and observing the modulation of the azimuthal distribution. To demonstrate the gamma-ray polarization sensitivity of emulsion, we conducted a test using a polarized gamma-ray beam (0.8-2.4 GeV) at SPring-8/LEPS. Emulsion tracks were reconstructed using scanning data, and gamma-ray events were selected automatically. Using an optical microscope, out of the 2381 gamma-ray conversions that were observed, 1372 remained after event selection, on the azimuthal angle distribution of which we measured the modulation. From the distribution of the azimuthal angles of the selected events, a modulation factor of 0.21+0.11-0.09 was measured, from which the detection of a non-zero modulation was established with a significance of 3.06 sigma. This attractive polarimeter will be applied to the GRAINE project, a balloon-borne experiment that observes 10-100 GeV cosmic gamma-rays with an emulsion-based pair conversion telescope. (C) 2016 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2016年10月11日, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 833, 165 - 168, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Takahashi S, Aoki S, Hara T, Kawahara H, Kosaka T, Mizutani F, Otsuka N, Ozaki K, Rokujo H, Shibayama E, Suzuki A, Tateishi Y, Tawa S, Yamada K, Yabu M

    We are developing the GRAINE project, which consists of a 10MeV-100 GeV cosmic gamma-ray observation with a precise (0.08 degrees at 1-2 GeV) and polarization-sensitive (50% or below the minimum detectable polarization for the Vela pulsar above 100 MeV) large-aperture-area (similar to 10m(2)) emulsion telescope, by repetitive long duration balloon flights. In 2015, we performed a Japan-Australia JAXA collaborative balloon experiment at the Alice Springs balloon-launching station. The telescope had a 3780 cm(2) aperture and was aloft for a total of 14.4 h. The experiment aims to detect the well-known bright Vela pulsar gamma-ray source and thereby demonstrate the overall performance of the emulsion gamma-ray telescope. The design, improvements, and preparations as well as the 2015 balloon experiment are described in this paper. Analysis of the data from this experiment is ongoing.

    OXFORD UNIV PRESS INC, 2016年07月25日, Prog. Theor. Exp. Phys., 2016 (7), 073F01, 英語

    [査読有り]

    研究論文(学術雑誌)

  • N. Agafonova, A. Aleksandrov, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, D. Bender, A. Bertolin, C. Bozza, R. Brugnera, A. Buonaura, S. Buontempo, B. Buettner, M. Chernyavsky, A. Chukanov, L. Consiglio, N. D'Ambrosio, G. De Lellis, M. De Serio, P. Del Amo Sanchez, A. Di Crescenzo, D. Di Ferdinando, N. Di Marco, S. Dmitrievski, M. Dracos, D. Duchesneau, S. Dusini, T. Dzhatdoev, J. Ebert, A. Ereditato, R. A. Fini, T. Fukuda, G. Galati, A. Garfagnini, G. Giacomelli, C. Goellnitz, J. Goldberg, D. Goloubkov, Y. Gornushkin, G. Grella, M. Guler, C. Gustavino, C. Hagner, T. Hara, A. Hollnagel, B. Hosseini, H. Ishida, K. Ishiguro, K. Jakovcic, C. Jollet, C. Kamiscioglu, M. Kamiscioglu, J. Kawada, J. H. Kim, S. H. Kim, N. Kitagawa, B. Klicek, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, A. Lauria, J. Lenkeit, A. Ljubicic, A. Longhin, P. Loverre, A. Malgin, M. Malenica, G. Mandrioli, T. Matsuo, V. Matveev, N. Mauri, E. Medinaceli, A. Meregaglia, M. Meyer, S. Mikado, P. Monacelli, M. C. Montesi, K. Morishima, M. T. Muciaccia, N. Naganawa, T. Naka, M. Nakamura, T. Nakano, Y. Nakatsuka, K. Niwa, S. Ogawa, N. Okateva, A. Olshevsky, T. Omura, K. Ozaki, A. Paoloni, B. D. Park, I. G. Park, L. Pasqualini, A. Pastore, L. Patrizii, H. Pessard, C. Pistillo, D. Podgrudkov, N. Polukhina, M. Pozzato, F. Pupilli, M. Roda, H. Rokujo, T. Roganova, G. Rosa, I. Rostovtseva, O. Ryazhskaya, O. Sato, Y. Sato, A. Schembri, I. Shakiryanova, T. Shchedrina, A. Sheshukov, H. Shibuya, T. Shiraishi, G. Shoziyoev, S. Simone, M. Sioli, C. Sirignano, G. Sirri, M. Spinetti, L. Stanco, N. Starkov, S. M. Stellacci, M. Stipcevic, P. Strolin, S. Takahashi, M. Tenti, F. Terranova, V. Tioukov, S. Tufanli, P. Vilain, M. Vladimirov, L. Votano, J. L. Vuilleumier, G. Wilquet, B. Wonsak, C. S. Yoon, Y. Zaitsev, S. Zemskova, A. Zghiche

    The OPERA long-baseline neutrino-oscillation experiment has observed the direct appearance of nu(tau) in the CNGS nu(mu) beam. Two large muon magnetic spectrometers are used to identify muons produced in the tau leptonic decay and in nu(mu) CC interactions by measuring their charge and momentum. Besides the kinematic analysis of the tau decays, background resulting from the decay of charmed particles produced in nu(mu) CC interactions is reduced by efficiently identifying the muon track. A new method for the charge sign determination has been applied, via a weighted angular matching of the straight track-segments reconstructed in the different parts of the dipole magnets. Results obtained for Monte Carlo and real data are presented. Comparison with a method where no matching is used shows a significant reduction of up to 40% of the fraction of wrongly determined charges.

    IOP PUBLISHING LTD, 2016年07月25日, JOURNAL OF INSTRUMENTATION, 11 (7), P07022, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe, Ko, Andreopoulos, Costas, Antonova, Maria, Aoki, Shigeki, Ariga, Akitaka, Assylbekov, Shamil, Autiero, Dario, Barbi, Mauricio, Barker, Gary J, Barr, Giles, Bartet-Friburg, Pierre, Batkiewicz, Marcela, Berardi, Vincenzo, Berkman, Sophie, Bhadra, Sampa, Blondel, Alain, Bolognesi, Sara, Bordoni, Stefania, Boyd, Steve B, Brailsford, Dominic, Bravar, Alessandro, Bronner, Christophe, Buizza Avanzini, Margherita, Calland, Richard Graham, Cao, Son, Caravaca Rodriguez, Javier, Cartwright, Susan L, Castillo, Raquel, Catanesi, Maria Gabriella, Cervera, Anselmo, Cherdack, Daniel, Chikuma, Naruhiro, Christodoulou, Georgios, Clifton, Alex, Coleman, Jonathon, Collazuol, Gianmaria, Cremonesi, Linda, Dabrowska, Anna, De Rosa, Gianfranca, Dealtry, Thomas, Denner, Paula F, Dennis, Stephen R, Densham, Chris, Dewhurst, Debra, Di Lodovico, Francesca, Di Luise, Silvestro, Dolan, Stephen, Drapier, Olivier, Duffy, Kirsty E, Dumarchez, Jacques, Dytman, Steve, Dziewiecki, Michal, Emery-Schrenk, Sandrine, Ereditato, Antonio, Feusels, Tom, Finch, Alexander J, Fiorentini, G A, Friend, Megan, Fujii, Yoshiaki, Fukuda, Daisuke, Fukuda, Yoshiyuki, Furmanski, Andrew P, Galymov, Vyacheslav, Garcia, Alfonso, Giffin, Spencer G, Giganti, Claudio, Gizzarelli, Francesco, Gonin, Michel, Grant, Nick, Hadley, David R, Haegel, Leïla, Haigh, Martin D, Hamilton, Pip, Hansen, Damon, Hara, Toshio, Hartz, Mark, Hasegawa, Takuya, Hastings, Nicholas C, Hayashino, Tatsuya, Hayato, Yoshinari, Helmer, Richard L, Hierholzer, Martin, Hillairet, Anthony, Himmel, Alexander, Hiraki, Takahiro, Hirota, Seiko, Hogan, Matthew, Holeczek, Jacek, Horikawa, Sosuke, Hosomi, Fuminao, Huang, Kunxian, Ichikawa, Atsuko K, Ieki, Kei, Ikeda, Motoyasu, Imber, James, Insler, Jonathan, Intonti, Rosaria Annalisa, Irvine, Tristan James, Ishida, Taku, Ishii, Takanobu, Iwai, Eito, Iwamoto, Konosuke, Izmaylov, Alexander, Jacob, Abraham, Jamieson, Blair, Jiang, Miao, Johnson, Scott, Jo, Jay Hyun, Jonsson, Per, Jung, C K, Kabirnezhad, Monireh, Kaboth, Asher C, Kajita, Takaaki, Kakuno, Hidekazu, Kameda, Jun, Karlen, Dean, Karpikov, Ivan, Katori, Teppei, Kearns, Ed, Khabibullin, Marat, Khotjantsev, Alexei, Kielczewska, Danuta, Kikawa, Tatsuya, Kim, Hyonil, Kim, Jiae, King, Sophie, Kisiel, Jan, Knight, Aaron, Knox, Alasdair, Kobayashi, Takashi, Koch, Lukas, Koga, Taichiro, Konaka, Akira, Kondo, Keisuke, Kopylov, Artem, Kormos, Laura L, Korzenev, Alexander, Koshio, Yusuke, Kropp, William, Kudenko, Yury, Kurjata, Robert, Kutter, Thomas, Lagoda, Justyna, Lamont, Iain, Larkin, Edward, Lasorak, Pierre, Laveder, Marco, Lawe, Matthew, Lazos, Michail, Lindner, Thomas, Liptak, Zachary J, Litchfield, R Phillip, Li, Xiaoyue, Longhin, Andrea, Lopez, Jeremy P, Ludovici, Lucio, Lu, Xianguo, Magaletti, Lorenzo, Mahn, Kendall, Malek, Matthew, Manly, Steven, Marino, Alysia D, Marteau, Jacques, Martin, J F, Martins, Paul, Martynenko, Sergey, Maruyama, Takasumi, Matveev, Victor, Mavrokoridis, Konstantinos, Ma, Wing Y, Mazzucato, Edoardo, McCarthy, Mark, McCauley, Neil, McFarland, Kevin S, McGrew, Clark, Mefodiev, Alexander, Mezzetto, Mauro, Mijakowski, Piotr, Minamino, Akihiro, Mineev, Oleg, Mine, Shunichi, Missert, Andrew, Miura, Makoto, Moriyama, Shigetaka, Mueller, Th A, Murphy, Sebastien, Myslik, Jordan, Nakadaira, Takeshi, Nakahata, Masayuki, Nakamura, Keigo G, Nakamura, Kenzo, Nakamura, Kiseki D, Nakayama, Shoei, Nakaya, Tsuyoshi, Nakayoshi, Kazuo, Nantais, Corina, Nielsen, Christine, Nirkko, Martti, Nishikawa, Koichiro, Nishimura, Yasuhiro, Nowak, Jaroslaw, O'Keeffe, Helen M, Ohta, Ryosuke, Okumura, Kimihiro, Okusawa, Toru, Oryszczak, Wojciech, Oser, Scott M, Ovsyannikova, Tatiana, Owen, R A, Oyama, Yuichi, Palladino, Vittorio, Palomino, Jose L, Paolone, Vittorio, Patel, Nikhul D, Pavin, Matej, Payne, David, Perkin, Jonathan D, Petrov, Yevgeniy, Pickard, Leon, Pickering, Luke, Pinzon Guerra, Elder Sebastian, Pistillo, Ciro, Popov, Boris, Posiadala-Zezula, Magdalena, Poutissou, Jean-Michel, Poutissou, Renee, Przewlocki, Pawel, Quilain, Benjamin, Radicioni, Emilio, Ratoff, Peter N, Ravonel, Melody, Rayner, Mark AM, Redij, Asmita, Reinherz-Aronis, Erez, Riccio, Ciro, Rojas, Paul, Rondio, Ewa, Roth, Stefan, Rubbia, Andre, Rychter, Andrzej, Sacco, Roberto, Sakashita, Ken, Sanchez, Federico, Sato, Fumitaka, Scantamburlo, Enrico, Scholberg, Kate, Schoppmann, Stefan, Schwehr, Jaclyn, Scott, Mark, Seiya, Yoshihiro, Sekiguchi, Tetsuro, Sekiya, Hiroyuki, Sgalaberna, Davide, Shah, Raj, Shaikhiev, Artur, Shaker, Fady, Shaw, Dave, Shiozawa, Masato, Shirahige, Tetsuya, Short, Samantha, Smy, Michael, Sobczyk, Jan T, Sorel, Michel, Southwell, Luke, Stamoulis, Panos, Steinmann, Jochen, Stewart, Trevor, Suda, Yusuke, Suvorov, Sergey, Suzuki, Atsumu, Suzuki, Kento, Suzuki, Soh Y, Suzuki, Yoichiro, Tacik, Roman, Tada, Masaru, Takahashi, Shota, Takeda, Atsushi, Takeuchi, Yasuo, Tanaka, Hide K, Tanaka, Hirohisa A, Terhorst, Dennis, Terri, Ryan, Thakore, Tarak, Thompson, Lee F, Tobayama, Shimpei, Toki, Walter, Tomura, Tomonobu, Touramanis, Christos, Tsukamoto, Toshifumi, Tzanov, Martin, Uchida, Yoshi, Vacheret, Antonin, Vagins, Mark, Vallari, Zoya, Vasseur, Georges, Wachala, Tomasz, Wakamatsu, Keiju, Walter, C W, Wark, David, Warzycha, Weronika, Wascko, Morgan O, Weber, Alfons, Wendell, Roger, Wilkes, R Jeffrey, Wilking, Michael J, Wilkinson, Callum, Wilson, Jeanne R, Wilson, Robert J, Yamada, Yoshikazu, Yamamoto, Kazuhiro, Yamamoto, Mika, Yanagisawa, C, Yano, Takatomi, Yen, Stanley, Yershov, Nikolai, Yokoyama, Masashi, Yoshida, Kento, Yuan, Tianlu, Yu, Mitchell, Zalewska, Agnieszka, Zalipska, Joanna, Zambelli, Laura, Zaremba, Krzysztof, Ziembicki, Marcin, Zimmerman, E D, Zito, Marco, Zmuda, Jakub

    2016年06月21日, Phys.Rev.D, 93 (11), 112012 - 112012, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe, Ko, Andreopoulos, Costas, Antonova, Maria, Aoki, Shigeki, Ariga, Akitaka, Assylbekov, Shamil, Autiero, Dario, Barbi, Mauricio, Barker, Gary J, Barr, Giles, Bartet-Friburg, Pierre, Batkiewicz, Marcela, Bay, Fatih, Berardi, Vincenzo, Berkman, Sophie, Bhadra, Sampa, Blondel, Alain, Bolognesi, Sara, Bordoni, Stefania, Boyd, Steve B, Brailsford, Dominic, Bravar, Alessandro, Bronner, Christophe, Buizza Avanzini, Margherita, Calland, Richard Graham, Cao, Son, Caravaca Rodriguez, Javier, Cartwright, Susan L, Castillo, Raquel, Catanesi, Maria Gabriella, Cervera, Anselmo, Cherdack, Daniel, Chikuma, Naruhiro, Christodoulou, Georgios, Clifton, Alex, Coleman, Jonathon, Collazuol, Gianmaria, Cremonesi, Linda, Dabrowska, Anna, De Rosa, Gianfranca, Dealtry, Thomas, Denner, Paula F, Dennis, Stephen R, Densham, Chris, Dewhurst, Debra, Di Lodovico, Francesca, Di Luise, Silvestro, Dolan, Stephen, Drapier, Olivier, Duffy, Kirsty, Dumarchez, Jacques, Dytman, Steve, Dziewiecki, Michal, Emery-Schrenk, Sandrine, Ereditato, Antonio, Feusels, Tom, Finch, Alexander J, Fiorentini, G A, Friend, Megan, Fujii, Yoshiaki, Fukuda, Daisuke, Fukuda, Yoshiyuki, Furmanski, Andrew P, Galymov, Vyacheslav, Garcia, Alfonso, Giffin, Spencer G, Giganti, Claudio, Gizzarelli, Francesco, Gonin, Michel, Grant, Nick, Hadley, David R, Haegel, Leïla, Haigh, Martin D, Hamilton, Pip, Hansen, Damon, Hara, Toshio, Hartz, Mark, Hasegawa, Takuya, Hastings, Nicholas C, Hayashino, Tatsuya, Hayato, Yoshinari, Helmer, Richard L, Hierholzer, Martin, Hillairet, Anthony, Himmel, Alexander, Hiraki, Takahiro, Hirota, Seiko, Hogan, Matthew, Holeczek, Jacek, Horikawa, Sosuke, Hosomi, Fuminao, Huang, Kunxian, Ichikawa, Atsuko K, Ieki, Kei, Ikeda, Motoyasu, Imber, James, Insler, Jonathan, Intonti, Rosaria Annalisa, Irvine, Tristan James, Ishida, Taku, Ishii, Takanobu, Iwai, Eito, Iwamoto, Konosuke, Izmaylov, Alexander, Jacob, Abraham, Jamieson, Blair, Jiang, Miao, Johnson, Scott, Jo, Jay Hyun, Jonsson, Per, Jung, C K, Kabirnezhad, Monireh, Kaboth, Asher C, Kajita, Takaaki, Kakuno, Hidekazu, Kameda, Jun, Karlen, Dean, Karpikov, Ivan, Katori, Teppei, Kearns, Ed, Khabibullin, Marat, Khotjantsev, Alexei, Kielczewska, Danuta, Kikawa, Tatsuya, Kim, Hyonil, Kim, Jiae, King, Sophie, Kisiel, Jan, Knight, Aaron, Knox, Alasdair, Kobayashi, Takashi, Koch, Lukas, Koga, Taichiro, Konaka, Akira, Kondo, Keisuke, Kopylov, Artem, Kormos, Laura L, Korzenev, Alexander, Koshio, Yusuke, Kropp, William, Kudenko, Yury, Kurjata, Robert, Kutter, Thomas, Lagoda, Justyna, Lamont, Iain, Larkin, Edward, Laveder, Marco, Lawe, Matthew, Lazos, Michail, Lindner, Thomas, Liptak, Zachary J, Litchfield, R Phillip, Longhin, Andrea, Lopez, Jeremy P, Ludovici, Lucio, Lu, Xianguo, Magaletti, Lorenzo, Mahn, Kendall, Malek, Matthew, Manly, Steven, Marino, Alysia D, Marteau, Jacques, Martin, J F, Martins, Paul, Martynenko, Sergey, Maruyama, Takasumi, Matveev, Victor, Mavrokoridis, Konstantinos, Ma, Wing Y, Mazzucato, Edoardo, McCarthy, Mark, McCauley, Neil, McFarland, Kevin S, McGrew, Clark, Mefodiev, Alexander, Mezzetto, Mauro, Mijakowski, Piotr, Minamino, Akihiro, Mineev, Oleg, Mine, Shunichi, Missert, Andrew, Miura, Makoto, Moriyama, Shigetaka, Mueller, Th A, Murphy, Sebastien, Myslik, Jordan, Nakadaira, Takeshi, Nakahata, Masayuki, Nakamura, Keigo G, Nakamura, Kenzo, Nakamura, Kiseki D, Nakayama, Shoei, Nakaya, Tsuyoshi, Nakayoshi, Kazuo, Nantais, Corina, Nielsen, Christine, Nirkko, Martti, Nishikawa, Koichiro, Nishimura, Yasuhiro, Nowak, Jaroslaw, O'Keeffe, Helen M, Ohta, Ryosuke, Okumura, Kimihiro, Okusawa, Toru, Oryszczak, Wojciech, Oser, Scott M, Ovsyannikova, Tatiana, Owen, R A, Oyama, Yuichi, Palladino, Vittorio, Palomino, Jose L, Paolone, Vittorio, Patel, Nikhul D, Pavin, Matej, Payne, David, Perkin, Jonathan D, Petrov, Yevgeniy, Pickard, Leon, Pickering, Luke, Pinzon Guerra, Elder Sebastian, Pistillo, Ciro, Popov, Boris, Posiadala-Zezula, Magdalena, Poutissou, Jean-Michel, Poutissou, Renee, Przewlocki, Pawel, Quilain, Benjamin, Radicioni, Emilio, Ratoff, Peter N, Ravonel, Melody, Rayner, Mark AM, Redij, Asmita, Reinherz-Aronis, Erez, Riccio, Ciro, Rojas, Paul, Rondio, Ewa, Roth, Stefan, Rubbia, Andre, Rychter, Andrzej, Sacco, Roberto, Sakashita, Ken, Sanchez, Federico, Sato, Fumitaka, Scantamburlo, Enrico, Scholberg, Kate, Schoppmann, Stefan, Schwehr, Jaclyn, Scott, Mark, Seiya, Yoshihiro, Sekiguchi, Tetsuro, Sekiya, Hiroyuki, Sgalaberna, Davide, Shah, Raj, Shaikhiev, Artur, Shaker, Fady, Shaw, Dave, Shiozawa, Masato, Shirahige, Tetsuya, Short, Samantha, Smy, Michael, Sobczyk, Jan T, Sorel, Michel, Southwell, Luke, Stamoulis, Panos, Steinmann, Jochen, Stewart, Trevor, Suda, Yusuke, Suvorov, Sergey, Suzuki, Atsumu, Suzuki, Kento, Suzuki, Soh Y, Suzuki, Yoichiro, Tacik, Roman, Tada, Masaru, Takahashi, Shota, Takeda, Atsushi, Takeuchi, Yasuo, Tanaka, Hide K, Tanaka, Hirohisa A, Terhorst, Dennis, Terri, Ryan, Thakore, Tarak, Thompson, Lee F, Tobayama, Shimpei, Toki, Walter, Tomura, Tomonobu, Touramanis, Christos, Tsukamoto, Toshifumi, Tzanov, Martin, Uchida, Yoshi, Vacheret, Antonin, Vagins, Mark, Vallari, Zoya, Vasseur, Georges, Wachala, Tomasz, Wakamatsu, Keiju, Walter, C W, Wark, David, Warzycha, Weronika, Wascko, Morgan O, Weber, Alfons, Wendell, Roger, Wilkes, R Jeffrey, Wilking, Michael J, Wilkinson, Callum, Wilson, Jeanne R, Wilson, Robert J, Yamada, Yoshikazu, Yamamoto, Kazuhiro, Yamamoto, Mika, Yanagisawa, C, Yano, Takatomi, Yen, Stanley, Yershov, Nikolai, Yokoyama, Masashi, Yoshida, Kento, Yuan, Tianlu, Yu, Mitchell, Zalewska, Agnieszka, Zalipska, Joanna, Zambelli, Laura, Zaremba, Krzysztof, Ziembicki, Marcin, Zimmerman, E D, Zito, Marco, Zmuda, Jakub

    2016年05月05日, Phys.Rev.Lett., 116 (18), 181801 - 181801, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe K, Aoki S, Hara T, Suzuki A, Takeuchi Y, Yano. T

    2016年04月05日, Phys. Rev. D, 93 (7), 072002 - 072002, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe, K., Adam, J., Aihara, H., Akiri, T., Andreopoulos, C., Aoki, S., Ariga, A., Assylbekov, S., Autiero, D., Barbi, M., Barker, G.J., Barr, G., Bartet-Friburg, P., Bass, M., Batkiewicz, M., Bay, F., Berardi, V., Berger, B.E., Berkman, S., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bojechko, C., Bolognesi, S., Bordoni, S., Boyd, S.B., Brailsford, D., Bravar, A., Bronner, C., Buchanan, N., Calland, R.G., Caravaca Rodriguez, J., Cartwright, S.L., Castillo, R., Catanesi, M.G., Cervera, A., Cherdack, D., Chikuma, N., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S.J., Collazuol, G., Connolly, K., Cremonesi, L., Dabrowska, A., Danko, I., Das, R., Davis, S., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S.R., Densham, C., Dewhurst, D., Di Lodovico, F., Di Luise, S., Dolan, S., Drapier, O., Duboyski, T., Duffy, K., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery-Schrenk, S., Ereditato, A., Escudero, L., Feusels, T., Finch, A.J., Fiorentini, G.A., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A.P., Galymov, V., Garcia, A., Giffin, S., Giganti, C., Gilje, K., Goeldi, D., Golan, T., Gonin, M., Grant, N., Gudin, D., Hadley, D.R., Haegel, L., Haesler, A., Haigh, M.D., Hamilton, P., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N.C., Hayashino, T., Hayato, Y., Hearty, C., Helmer, R.L., Hierholzer, M., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Hirota, S., Holeczek, J., Horikawa, S., Hosomi, F., Huang, K., Ichikawa, A.K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Irvine, T.J., Ishida, T., Ishii, T., Iwai, E., Iwamoto, K., Iyogi, K., Izmaylov, A., Jacob, A., Jamieson, B., Jiang, M., Johnson, R.A., Johnson, S., Jo, J.H., Jonsson, P., Jung, C.K., Kabirnezhad, M., Kaboth, A.C., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Katori, T., Kearns, E., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J., King, S., Kisiel, J., Kitching, P., Kobayashi, T., Koch, L., Koga, T., Kolaceke, A., Konaka, A., Kopylov, A., Kormos, L.L., Korzenev, A., Koshio, Y., Kropp, W., Kubo, H., Kudenko, Y., Kurjata, R., Kutter, T., Lagoda, J., Lamont, I., Larkin, E., Laveder, M., Lawe, M., Lazos, M., Lindner, T., Lister, C., Litchfield, R.P., Longhin, A., Lopez, J.P., Ludovici, L., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marino, A.D., Marteau, J., Martin, J.F., Martins, P., Martynenko, S., Maruyama, T., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K.S., McGrew, C., Mefodiev, A., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C.A., Minamino, A., Mineev, O., Missert, A., Miura, M., Moriyama, S., Mueller, Th. A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nakadaira, T., Nakahata, M., Nakamura, K.G., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Nantais, C., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., Nowak, J., O'Keeffe, H.M., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S.M., Ovsyannikova, T., Owen, R.A., Oyama, Y., Palladino, V., Palomino, J.L., Paolone, V., Payne, D., Perevozchikov, O., Perkin, J.D., Petrov, Y., Pickard, L., Pinzon Guerra, E.S., Pistillo, C., Plonski, P., Poplawska, E., Popov, B., Posiadala-Zezula, M., Poutissou, J.M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P.N., Ravonel, M., Rayner, M.A.M., Redij, A., Reeves, M., Reinherz-Aronis, E., Riccio, C., Rodrigues, P.A., Rojas, P., Rondio, E., Roth, S., Rubbia, A., Ruterbories, D., Rychter, A., Sacco, R., Sakashita, K., Sanchez, F., Sato, F., Scantamburlo, E., Scholberg, K., Schoppmann, S., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shah, R., Shaker, F., Shaw, D., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smy, M., Sobczyk, J.T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Suda, Y., Suzuki, A., Suzuki, K., Suzuki, S.Y., Suzuki, Y., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H.K., Tanaka, H.A., Tanaka, M.M., Terhorst, D., Terri, R., Thompson, L.F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Wakamatsu, K., Walter, C.W., Wark, D., Warzycha, W., Wascko, M.O., Weber, A., Wendell, R., Wilkes, R.J., Wilking, M.J., Wilkinson, C., Williamson, Z., Wilson, J.R., Wilson, R.J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yoo, J., Yoshida, K., Yuan, T., Yu, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E.D., Zito, M., Zmuda, J.

    2016年01月27日, Phys.Rev.D, 93 (1), 012006 - 012006, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe K, Aoki S, Hara T, Suzuki A, Takeuchi Y, Yano. T

    2015年12月11日, Phys. Rev. D, 92 (11), 112003 - 112003, 英語

    [査読有り]

    研究論文(学術雑誌)

  • K. Ozaki, S. Aoki, K. Kamada, T. Kosaka, F. Mizutani, E. Shibayama, S. Takahashi, Y. Tateishi, S. Tawa, K. Yamada, H. Kawahara, N. Otsuka, H. Rokujo

    This study reports a new-type of nuclear emulsion that improves the track-finding efficiency of charged particle detection. The emulsion is applied to the GRAINE project, a balloon borne experiment that observes cosmic y-rays through an emulsion y-ray telescope. The new emulsion film dramatically improves the detection efficiency for y-rays. The nuclear emulsion gel and films for the second GRAINE balloon-borne experiment (GRAINE-2015) were fully self produced by ourselves. New handling methods for the novel emulsion film have also been developed. Over time, the stored films gradually become desensitized to minimum ionizing particles, but the original sensitivity can he restored by a resetting process. Moreover, the fading of latent images can be arrested by a drying process. To sensitize the new-type films and avoid their fading, emulsion preprocessing was applied immediately prior to GRAINE-2015. A balloon flight with the emulsion y-ray telescope was successfully completed in Australia on 12th May 2015. By scanning with automated optical microscopes and analyzing the penetrated tracks, we confirmed the high track finding efficiency (97(70) of the mounted films. The analysis of y-ray event detection, aims at detecting Vela pulsar, is in progress.

    IOP PUBLISHING LTD, 2015年12月, JOURNAL OF INSTRUMENTATION, 10 (12), P1208, 英語

    [査読有り]

    研究論文(学術雑誌)

  • N. Agafonova, A. Aleksandrov, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, D. Bender, A. Bertolin, C. Bozza, R. Brugnera, A. Buonaura, S. Buontempo, B. Buettner, M. Chernyaysky, A. Chukanov, L. Consiglio, N. D'Ambrosio, G. De Lellis, M. De Serio, P. Del Amo Sanchez, A. Di Crescenzo, D. Di Ferdinando, N. Di Marco, S. Dmitrievski, M. Dracos, D. Duchesneau, S. Dusini, T. Dzhatdoev, J. Ebert, A. Ereditato, R. A. Fini, T. Fukuda, G. Galati, A. Garfagnini, G. Giacomelli, C. Goellnitz, J. Goldberg, Y. Gornushkin, G. Grella, M. Guler, C. Gustavino, C. Hagner, T. Hara, A. Hollnagel, B. Hosseini, H. Ishida, K. Ishiguro, K. Jakovcic, C. Jollet, C. Kamiscioglu, M. Kamiscioglu, J. Kawada, J. H. Kim, S. H. Kim, N. Kitagawa, B. Klicek, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, A. Lauria, J. Lenkeit, A. Ljubicic, A. Longhin, P. Loverre, A. Malgin, M. Malenica, G. Mandrioli, T. Matsuo, V. Matveev, N. Mauri, E. Medinaceli, A. Meregaglia, S. Mikado, P. Monacelli, M. C. Montesi, K. Morishima, M. T. Muciaccia, N. Naganawa, T. Naka, M. Nakamura, T. Nakano, Y. Nakatsuka, K. Niwa, S. Ogawa, N. Okateva, A. Olshevsky, T. Omura, K. Ozaki, A. Paoloni, B. D. Park, I. G. Park, L. Pasqualini, A. Pastore, L. Patrizii, H. Pessard, C. Pistillo, D. Podgrudkov, N. Polukhina, M. Pozzato, F. Pupilli, M. Roda, H. Rokujo, T. Roganova, G. Rosa, O. Ryazhskaya, O. Sato, A. Schembri, I. Shakiryanova, T. Shchedrina, A. Sheshukov, H. Shibuya, T. Shiraishi, G. Shoziyoev, S. Simone, M. Sioli, C. Sirignano, G. Sirri, M. Spinetti, L. Stanco, N. Starkov, S. M. Stellacci, M. Stipcevic, T. Strauss, P. Strolin, S. Takahashi, M. Tenti, F. Terranova, V. Tioukov, S. Tufanli, P. Vilain, M. Vladimirov, L. Votano, J. L. Vuilleumier, G. Wilquet, B. Wonsak, C. S. Yoon, S. Zemskova, A. Zghiche

    The OPERA experiment was designed to study v mu -> v(tau) oscillations in appearance mode using the CERN to Gran Sasso high energy neutrino beam. From 2008 to 2012, 19505 CNGS neutrino interactions were recorded in the OPERA detector. At the present status of the analysis, 4 v(tau) candidate events have been observed, establishing the oscillation mechanism in the atmospheric sector with a significance of 4.2 sigma. The oscillation analysis will be presented in detail and the candidate events will be described. The final measurement of the atmospheric muon charge ratio in the TeV region will be also reported.

    ELSEVIER SCIENCE BV, 2015年10月, NUCLEAR AND PARTICLE PHYSICS PROCEEDINGS, 267, 87 - 93, 英語

    [査読有り]

    研究論文(国際会議プロシーディングス)

  • Agafonova N, Aoki S, Hara T, Mizutani F, Ozaki K, Rokujo H, Takahashi S

    The OPERA experiment was designed to search for nu(mu) -> nu(tau) oscillations in appearance mode, i.e., by detecting the tau leptons produced in charged current nu(tau) interactions. The experiment took data from 2008 to 2012 in the CERN Neutrinos to Gran Sasso beam. The observation of the nu(mu) -> nu(tau) appearance, achieved with four candidate events in a subsample of the data, was previously reported. In this Letter, a fifth nu(tau) candidate event, found in an enlarged data sample, is described. Together with a further reduction of the expected background, the candidate events detected so far allow us to assess the discovery of nu(mu) -> nu(tau) oscillations in appearance mode with a significance larger than 5 sigma.

    AMER PHYSICAL SOC, 2015年09月, Phys. Rev. Lett., 115 (12), 121802, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe K, Aoki S, Hara T, Suzuki A, Takeuchi Y, Yano. T

    2015年06月19日, Phys. Rev. D, 91 (11), 112010 - 112010, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe K, Aoki S, Hara T, Suzuki A, Takeuchi Y, Yano. T

    2015年06月04日, Phys. Rev. D, 91 (11), 112002 - 112002, 英語

    [査読有り]

    研究論文(学術雑誌)

  • N. Agafonova, A. Aleksandrov, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, D. Bender, A. G. Bertolin, I. Bodnarchuk, C. Bozza, R. Brugnera, A. Buonaura, S. Buontempo, B. Buettner, M. Chernyavsky, A. Chukanov, L. Consiglio, N. D'Ambrosio, G. De Lellis, M. De Serio, P. Del Amo Sanchez, A. Di Crescenzo, D. Di Ferdinando, N. Di Marco, S. Dmitrievski, M. Dracos, D. Duchesneau, S. Dusini, T. Dzhatdoev, J. Ebert, A. Ereditato, R. A. Fini, T. Fukuda, G. Galati, A. Garfagnini, J. Goldberg, Y. Gornushkin, G. Grella, A. M. Guler, C. Gustavino, C. Hagner, T. Hara, A. Hollnagel, B. Hosseini, K. Ishiguro, K. Jakovcic, C. Jollet, C. Kamiscioglu, M. Kamiscioglu, J. H. Kim, S. H. Kim, N. Kitagawa, B. Klicek, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, A. Lauria, A. Ljubicic, A. Longhin, A. Malgin, M. Malenica, G. Mandrioli, T. Matsuo, V. Matveev, N. Mauri, E. Medinaceli, A. Meregaglia, S. Mikado, P. Monacelli, M. C. Montesi, K. Morishima, M. T. Muciaccia, N. Naganawa, T. Naka, M. Nakamura, T. Nakano, Y. Nakatsuka, K. Niwa, S. Ogawa, T. Omura, K. Ozaki, A. Paoloni, L. Paparella, B. D. Park, I. G. Park, L. Pasqualini, A. Pastore, L. Patrizii, H. Pessard, D. Podgrudkov, N. Polukhina, M. Pozzato, F. Pupilli, M. Roda, T. Roganova, H. Rokujo, G. Rosa, O. Ryazhskaya, O. Sato, A. Schembri, I. Shakirianova, T. Shchedrina, A. Sheshukov, H. Shibuya, T. Shiraishi, G. Shoziyoev, S. Simone, M. Sioli, C. Sirignano, G. Sirri, M. Spinetti, L. Stanco, N. Starkov, S. M. Stellacci, M. Stipcevic, P. Strolin, S. Takahashi, M. Tenti, F. Terranova, V. Tioukov, S. Tufanli, P. Vilain, M. Vladymyrov, L. Votano, J. L. Vuilleumier, G. Wilquet, B. Wonsak, C. S. Yoon, S. Zemskova

    The OPERA experiment, exposed to the CERN to Gran Sasso nu(mu) beam, collected data from 2008 to 2012. Four oscillated nu(tau) Charged Current interaction candidates have been detected in appearance mode, which are consistent with nu(mu) -> nu(tau) oscillations at the atmospheric Delta m(2) within the "standard" three-neutrino framework. In this paper, the OPERA nu(tau) appearance results are used to derive limits on the mixing parameters of a massive sterile neutrino.

    SPRINGER, 2015年06月, JOURNAL OF HIGH ENERGY PHYSICS, 1506 (6), 69, 英語

    [査読有り]

    研究論文(学術雑誌)

  • K. Suzuki, S. Aoki, A. Ariga, T. Ariga, F. Bay, C. Bronner, A. Ereditato, M. Friend, M. Hartz, T. Hiraki, A. K. Ichikawa, T. Ishida, T. Ishii, F. Juget, T. Kikawa, T. Kobayashi, H. Kubo, K. Matsuoka, T. Maruyama, A. Minamino, A. Murakami, T. Nakadaira, T. Nakaya, K. Nakayoshi, M. Otani, Y. Oyama, N. Patel, C. Pistillo, K. Sakashita, T. Sekiguchi, S. Y. Suzuki, S. Tada, Y. Yamada, K. Yamamoto, M. Yokoyama

    The Tokai-to-Kamioka (T2K) neutrino experiment measures neutrino oscillations by using an almost pure muon neutrino beam produced at the J-PARC accelerator facility. The T2K muon monitor was installed to measure the direction and stability of the muon beam which is produced in conjunction with the muon neutrino beam. The systematic error in the muon beam direction measurement was estimated, using data and MC simulation, to be 0.28 mrad. During beam operation, the proton beam has been controlled using measurements from the muon monitor and the direction of the neutrino beam has been tuned to within 0.3 mrad with respect to the designed beam-axis. In order to understand the muon beam properties, measurement of the absolute muon yield at the muon monitor was conducted with an emulsion detector. The number of muon tracks was measured to be (4.06 +/- 0.05 +/- 0.10) x 10(4) cm(-2) normalized with 4 x 10(11) protons on target with 250 kA horn operation. The result is in agreement with the prediction, which is corrected based on hadron production data.

    OXFORD UNIV PRESS INC, 2015年05月, PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, 2015 (5), 053C01, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe K, Aoki S, Hara T, Suzuki A, Takeuchi Y, Yano. T

    2015年04月29日, Phys. Rev. D, 91 (7), 072010 - 072010, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe, K., Adam, J., Aihara, H., Akiri, T., Andreopoulos, C., Aoki, S., Ariga, A., Assylbekov, S., Autiero, D., Barbi, M., Barker, G.J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Berardi, V., Berger, B.E., Berkman, S., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bojechko, C., Bordoni, S., Boyd, S.B., Brailsford, D., Bravar, A., Bronner, C., Buchanan, N., Calland, R.G., Caravaca Rodriguez, J., Cartwright, S.L., Castillo, R., Catanesi, M.G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S.J., Collazuol, G., Connolly, K., Cremonesi, L., Dabrowska, A., Danko, I., Das, R., Davis, S., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S.R., Densham, C., Dewhurst, D., Di Lodovico, F., Di Luise, S., Drapier, O., Duboyski, T., Duffy, K., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery-Schrenk, S., Ereditato, A., Escudero, L., Finch, A.J., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A.P., Galymov, V., Giffin, S., Giganti, C., Gilje, K., Goeldi, D., Golan, T., Gonin, M., Grant, N., Gudin, D., Hadley, D.R., Haesler, A., Haigh, M.D., Hamilton, P., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N.C., Hayato, Y., Hearty, C., Helmer, R.L., Hierholzer, M., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Hirota, S., Holeczek, J., Horikawa, S., Huang, K., Ichikawa, A.K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Irvine, T.J., Ishida, T., Ishii, T., Iwai, E., Iwamoto, K., Iyogi, K., Izmaylov, A., Jacob, A., Jamieson, B., Johnson, R.A., Johnson, S., Jo, J.H., Jonsson, P., Jung, C.K., Kabirnezhad, M., Kaboth, A.C., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Katori, T., Kearns, E., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J., King, S., Kisiel, J., Kitching, P., Kobayashi, T., Koch, L., Kolaceke, A., Konaka, A., Kormos, L.L., Korzenev, A., Koseki, K., Koshio, Y., Kropp, W., Kubo, H., Kudenko, Y., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Lamont, I., Larkin, E., Laveder, M., Lawe, M., Lazos, M., Lindner, T., Lister, C., Litchfield, R.P., Longhin, A., Ludovici, L., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marino, A.D., Marteau, J., Martin, J.F., Martynenko, S., Maruyama, T., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K.S., McGrew, C., Mefodiev, A., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C.A., Minamino, A., Mineev, O., Missert, A., Miura, M., Moriyama, S., Mueller, Th. A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nakadaira, T., Nakahata, M., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., O'Keeffe, H.M., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S.M., Ovsyannikova, T., Owen, R.A., Oyama, Y., Palladino, V., Palomino, J.L., Paolone, V., Payne, D., Perevozchikov, O., Perkin, J.D., Petrov, Y., Pickard, L., Pinzon Guerra, E.S., Pistillo, C., Plonski, P., Poplawska, E., Popov, B., Posiadala-Zezula, M., Poutissou, J.M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P.N., Ravonel, M., Rayner, M.A.M., Redij, A., Reeves, M., Reinherz-Aronis, E., Riccio, C., Rodrigues, P.A., Rojas, P., Rondio, E., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sakashita, K., Sanchez, F., Sato, F., Scantamburlo, E., Scholberg, K., Schoppmann, S., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shaker, F., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smy, M., Sobczyk, J.T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Suda, Y., Suzuki, A., Suzuki, K., Suzuki, S.Y., Suzuki, Y., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H.K., Tanaka, H.A., Tanaka, M.M., Terhorst, D., Terri, R., Thompson, L.F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Waldron, A.V., Walter, C.W., Wark, D., Wascko, M.O., Weber, A., Wendell, R., Wilkes, R.J., Wilking, M.J., Wilkinson, C., Williamson, Z., Wilson, J.R., Wilson, R.J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Yu, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E.D., Zito, M., Zmuda, J.

    2015年04月01日, PTEP, 2015 (4), 043C01, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Satoru Takahashi, Shigeki Aoki, Keiki Kamada, Saki Mizutani, Ryo Nakagawa, Keita Ozaki, Hiroki Rokujo

    The GRAINE project (Gamma-Ray Astro-Imager with Nuclear Emulsion) has been developed for the observation of cosmic gamma-rays in the energy range 10MeV-100 GeV with a precise (0.08 degrees at 1-2 GeV), polarization-sensitive, large-aperture-area (similar to 10 m(2)) emulsion telescope by repeated long-duration balloon flights. In 2011, the first balloon-borne experiment was successfully performed with a 12.5 x 10 cm(2) aperture area and 4.6 hour flight duration for a feasibility and performance test. Systematic detection, energy reconstruction, and timestamping of gamma-ray events were performed across the whole area of the emulsion film, up to 45 degrees incident zenith angle, down to 50MeV gamma-ray energy, with 97% detection reliability, 0.2 sec timestamp accuracy, and 98% timestamp reliability. A gamma-ray data checking and calibration method was created using the gamma-rays produced in the converter. We measured the atmospheric gamma-ray flux in the energy range 50-300MeV and obtained a first understanding of the cosmic gamma-ray background. By combining the attitude data, we established a procedure for determining the gamma-ray arrival direction in celestial coordinates. The first flight of the balloon-borne emulsion telescope confirmed its potential as a high-performance cosmic gamma-ray detector.

    OXFORD UNIV PRESS INC, 2015年04月, PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, 2015 (4), 043H01, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe K, Aoki S, Hara T, Suzuki A, Takeuchi Y, Yano T

    2015年03月16日, Phys. Rev. D, 91 (5), 051102 - 051102, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe, K., Adam, J., Aihara, H., Akiri, T., Andreopoulos, C., Aoki, S., Ariga, A., Assylbekov, S., Autiero, D., Barbi, M., Barker, G.J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Berardi, V., Berger, B.E., Berkman, S., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bojechko, C., Bordoni, S., Boyd, S.B., Brailsford, D., Bravar, A., Bronner, C., Buchanan, N., Calland, R.G., Caravaca Rodriguez, J., Cartwright, S.L., Castillo, R., Catanesi, M.G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S.J., Collazuol, G., Connolly, K., Cremonesi, L., Dabrowska, A., Danko, I., Das, R., Davis, S., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S.R., Densham, C., Dewhurst, D., Di Lodovico, F., Di Luise, S., Drapier, O., Duboyski, T., Duffy, K., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery-Schrenk, S., Ereditato, A., Escudero, L., Finch, A.J., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A.P., Galymov, V., Giffin, S., Giganti, C., Gilje, K., Goeldi, D., Golan, T., Gonin, M., Grant, N., Gudin, D., Hadley, D.R., Haesler, A., Haigh, M.D., Hamilton, P., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N.C., Hayato, Y., Hearty, C., Helmer, R.L., Hierholzer, M., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Hirota, S., Holeczek, J., Horikawa, S., Huang, K., Ichikawa, A.K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Irvine, T.J., Ishida, T., Ishii, T., Iwai, E., Iwamoto, K., Iyogi, K., Izmaylov, A., Jacob, A., Jamieson, B., Johnson, R.A., Jo, J.H., Jonsson, P., Jung, C.K., Kabirnezhad, M., Kaboth, A.C., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Katori, T., Kearns, E., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J., Kisiel, J., Kitching, P., Kobayashi, T., Koch, L., Kolaceke, A., Konaka, A., Kormos, L.L., Korzenev, A., Koshio, Y., Kropp, W., Kubo, H., Kudenko, Y., Kurjata, R., Kutter, T., Lagoda, J., Lamont, I., Larkin, E., Laveder, M., Lawe, M., Lazos, M., Lindner, T., Lister, C., Litchfield, R.P., Longhin, A., Ludovici, L., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marino, A.D., Marteau, J., Martin, J.F., Martynenko, S., Maruyama, T., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K.S., McGrew, C., Metelko, C., Mijakowski, P., Miller, C.A., Minamino, A., Mineev, O., Missert, A., Miura, M., Moriyama, S., Mueller, Th. A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nakadaira, T., Nakahata, M., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., O'Keeffe, H.M., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S.M., Owen, R.A., Oyama, Y., Palladino, V., Palomino, J.L., Paolone, V., Payne, D., Perevozchikov, O., Perkin, J.D., Petrov, Y., Pickard, L., Pinzon Guerra, E.S., Pistillo, C., Plonski, P., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J.M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P.N., Ravonel, M., Rayner, M.A.M., Redij, A., Reeves, M., Reinherz-Aronis, E., Rodrigues, P.A., Rojas, P., Rondio, E., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sakashita, K., Sanchez, F., Sato, F., Scantamburlo, E., Scholberg, K., Schoppmann, S., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smy, M., Sobczyk, J.T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Suda, Y., Suzuki, A., Suzuki, K., Suzuki, S.Y., Suzuki, Y., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H.K., Tanaka, H.A., Tanaka, M.M., Terhorst, D., Terri, R., Thompson, L.F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Waldron, A.V., Walter, C.W., Wark, D., Wascko, M.O., Weber, A., Wendell, R., Wilkes, R.J., Wilking, M.J., Wilkinson, C., Williamson, Z., Wilson, J.R., Wilson, R.J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Yu, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E.D., Zito, M., Zmuda, J.

    2014年12月11日, Phys.Rev.Lett., 113 (24), 241803 - 241803, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe K, Aoki S, Hara T, Suzuki A, Takeuchi Y, Yano T

    2014年10月31日, Phys. Rev. D, 90 (7), 072012 - 072012, 英語

    [査読有り]

    研究論文(学術雑誌)

  • N. Agafonova, A. Aleksandrov, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, T. Asada, D. Bender, A. Bertolin, C. Bozza, R. Brugnera, A. Buonaura, S. Buontempo, B. Buettner, M. Chernyavsky, A. Chukanov, L. Consiglio, N. D'Ambrosio, G. De Lellis, M. De Serio, P. Del Amo Sanchez, A. Di Crescenzo, D. Di Ferdinando, N. Di Marco, S. Dmitrievski, M. Dracos, D. Duchesneau, S. Dusini, T. Dzhatdoev, J. Ebert, A. Ereditato, R. A. Fini, T. Fukuda, G. Galati, A. Garfagnini, G. Giacomelli, C. Goellnitz, J. Goldberg, Y. Gornushkin, G. Grella, M. Guler, C. Gustavino, C. Hagner, T. Hara, T. Hayakawa, A. Hollnagel, B. Hosseini, H. Ishida, K. Ishiguro, K. Jakovcic, C. Jollet, C. Kamiscioglu, M. Kamiscioglu, T. Katsuragawa, J. Kawada, H. Kawahara, J. H. Kim, S. H. Kim, N. Kitagawa, B. Klicek, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, A. Lauria, J. Lenkeit, A. Ljubicic, A. Longhin, P. Loverre, M. Malenica, A. Malgin, G. Mandrioli, T. Matsuo, V. Matveev, N. Mauri, E. Medinaceli, A. Meregaglia, M. Meyer, S. Mikado, M. Miyanishi, P. Monacelli, M. C. Montesi, K. Morishima, M. T. Muciaccia, N. Naganawa, T. Naka, M. Nakamura, T. Nakano, Y. Nakatsuka, K. Niwa, S. Ogawa, N. Okateva, A. Olshevsky, T. Omura, K. Ozaki, A. Paoloni, B. D. Park, I. G. Park, L. Pasqualini, A. Pastore, L. Patrizii, H. Pessard, C. Pistillo, D. Podgrudkov, N. Polukhina, M. Pozzato, F. Pupilli, M. Roda, T. Roganova, H. Rokujo, G. Rosa, O. Ryazhskaya, O. Sato, A. Schembri, I. Shakiryanova, T. Shchedrina, A. Sheshukov, H. Shibuya, T. Shiraishi, G. Shoziyoev, S. Simone, M. Sioli, C. Sirignano, G. Sirri, M. Spinetti, L. Stanco, N. Starkov, S. M. Stellacci, M. Stipcevic, P. Strolin, S. Takahashi, M. Tenti, F. Terranova, V. Tioukov, S. Tufanli, A. Umemoto, P. Vilain, M. Vladimirov, L. Votano, J. L. Vuilleumier, G. Wilquet, B. Wonsak, C. S. Yoon, I. Yaguchi, M. Yoshimoto, S. Zemskova, A. Zghiche

    The OPERA experiment is searching for nu(mu) -> nu(tau) oscillations in appearance mode, i.e., via the direct detection of tau leptons in nu(tau) charged-current interactions. The evidence of nu(mu) -> nu(tau) appearance has been previously reported with three nu(tau) candidate events using a sub-sample of data from the 2008-2012 runs. We report here a fourth nu(tau) candidate event, with the tau decaying into a hadron, found after adding the 2012 run events without any muon in the final state to the data sample. Given the number of analyzed events and the low background, nu(mu) -> nu(tau) oscillations are established with a significance of 4.2 sigma.

    OXFORD UNIV PRESS INC, 2014年10月27日, PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, 2014 (10), 101C01, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe K, Aoki S, Hara T, Suzuki A, Takeuchi Y, Yano T

    2014年09月30日, Phys. Rev. D, 90 (5), 052010 - 052010, 英語

    [査読有り]

    研究論文(学術雑誌)

  • N. Agafonova, A. Aleksandrov, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, D. Bender, A. Bertolin, C. Bozza, R. Brugnera, A. Buonaura, S. Buontempo, B. Buettner, M. Chernyavsky, A. Chukanov, L. Consiglio, N. D'Ambrosio, G. De Lellis, M. De Serio, P. Del Amo Sanchez, A. Di Crescenzo, D. Di Ferdinando, N. Di Marco, S. Dmitrievski, M. Dracos, D. Duchesneau, S. Dusini, T. Dzhatdoev, J. Ebert, A. Ereditato, R. A. Fini, T. Fukuda, G. Galati, A. Garfagnini, G. Giacomelli, C. Goellnitz, J. Goldberg, Y. Gornushkin, G. Grella, M. Guler, C. Gustavino, C. Hagner, T. Hara, A. Hollnagel, B. Hosseini, H. Ishida, K. Ishiguro, K. Jakovcic, C. Jollet, C. Kamiscioglu, M. Kamiscioglu, J. Kawada, J. H. Kim, S. H. Kim, N. Kitagawa, B. Klicek, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, A. Lauria, J. Lenkeit, A. Ljubicic, A. Longhin, P. Loverre, A. Malgin, M. Malenica, G. Mandrioli, T. Matsuo, V. Matveev, N. Mauri, E. Medinaceli, A. Meregaglia, S. Mikado, P. Monacelli, M. C. Montesi, K. Morishima, M. T. Muciaccia, N. Naganawa, T. Naka, M. Nakamura, T. Nakano, Y. Nakatsuka, K. Niwa, S. Ogawa, N. Okateva, A. Olshevsky, T. Omura, K. Ozaki, A. Paoloni, B. D. Park, I. G. Park, L. Pasqualini, A. Pastore, L. Patrizii, H. Pessard, C. Pistillo, D. Podgrudkov, N. Polukhina, M. Pozzato, F. Pupilli, M. Roda, H. Rokujo, T. Roganova, G. Rosa, O. Ryazhskaya, O. Sato, A. Schembri, I. Shakiryanova, T. Shchedrina, A. Sheshukov, H. Shibuya, T. Shiraishi, G. Shoziyoev, S. Simone, M. Sioli, C. Sirignano, G. Sirri, M. Spinetti, L. Stanco, N. Starkov, S. M. Stellacci, M. Stipcevic, T. Strauss, P. Strolin, S. Takahashi, M. Tenti, F. Terranova, V. Tioukov, S. Tufanli, P. Vilain, M. Vladimirov, L. Votano, J. L. Vuilleumier, G. Wilquet, B. Wonsak, C. S. Yoon, S. Zemskova, A. Zghiche

    The OPERA experiment, designed to perform the first observation of nu(mu) -> nu(tau) oscillations in appearance mode through the detection of the tau leptons produced in nu(tau) charged current interactions, has collected data from 2008 to 2012. In the present paper, the procedure developed to detect tau particle decays, occurring over distances of the order of 1 mm from the neutrino interaction point, is described in detail and applied to the search for charmed hadrons, showing similar decay topologies as the tau lepton. In the analysed sample, 50 charm decay candidate events are observed while 54 +/- 4 are expected, proving that the detector performance and the analysis chain applied to neutrino events are well reproduced by the OPERA simulation and thus validating the methods for nu(tau) appearance detection.

    SPRINGER, 2014年08月07日, EUROPEAN PHYSICAL JOURNAL C, 74 (8), 2986, 英語

    [査読有り]

    研究論文(学術雑誌)

  • N. Agafonova, A. Aleksandrov, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, D. Bender, A. Bertolin, C. Bozza, R. Brugnera, A. Buonaura, S. Buontempo, B. Buettner, M. Chernyavsky, A. Chukanov, L. Consiglio, N. D'Ambrosio, G. De Lellis, M. De Serio, P. Del Amo Sanchez, A. Di Crescenzo, D. Di Ferdinando, N. Di Marco, S. Dmitrievski, M. Dracos, D. Duchesneau, S. Dusini, T. Dzhatdoev, J. Ebert, A. Ereditato, R. A. Fini, T. Fukuda, G. Galati, A. Garfagnini, G. Giacomelli, C. Goellnitz, J. Goldberg, Y. Gornushkin, G. Grella, M. Guler, C. Gustavino, C. Hagner, T. Hara, A. Hollnagel, B. Hosseini, H. Ishida, K. Ishiguro, K. Jakovcic, C. Jollet, C. Kamiscioglu, M. Kamiscioglu, J. Kawada, J. H. Kim, S. H. Kim, N. Kitagawa, B. Klicek, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, A. Lauria, J. Lenkeit, A. Ljubicic, A. Longhin, P. Loverre, A. Malgin, M. Malenica, G. Mandrioli, T. Matsuo, V. Matveev, N. Mauri, E. Medinaceli, A. Meregaglia, S. Mikado, P. Monacelli, M. C. Montesi, K. Morishima, M. T. Muciaccia, N. Naganawa, T. Naka, M. Nakamura, T. Nakano, Y. Nakatsuka, K. Niwa, S. Ogawa, N. Okateva, A. Olshevsky, T. Omura, K. Ozaki, A. Paoloni, B. D. Park, I. G. Park, L. Pasqualini, A. Pastore, L. Patrizii, H. Pessard, C. Pistillo, D. Podgrudkov, N. Polukhina, M. Pozzato, F. Pupilli, M. Roda, H. Rokujo, T. Roganova, G. Rosa, O. Ryazhskaya, O. Sato, A. Schembri, I. Shakiryanova, T. Shchedrina, A. Sheshukov, H. Shibuya, T. Shiraishi, G. Shoziyoev, S. Simone, M. Sioli, C. Sirignano, G. Sirri, M. Spinetti, L. Stanco, N. Starkov, S. M. Stellacci, M. Stipcevic, P. Strolin, S. Takahashi, M. Tenti, F. Terranova, V. Tioukov, S. Tufanli, P. Vilain, M. Vladimirov, L. Votano, J. L. Vuilleumier, G. Wilquet, B. Wonsak, C. S. Yoon, S. Zemskova, A. Zghiche

    The OPERA detector, designed to search for nu(mu) -> nu(tau) oscillations in the CNGS beam, is located in the underground Gran Sasso laboratory, a privileged location to study TeV-scale cosmic rays. For the analysis here presented, the detector was used to measure the atmospheric muon charge ratio in the TeV region. OPERA collected charge-separated cosmic ray data between 2008 and 2012. More than 3 million atmospheric muon events were detected and reconstructed, among which about 110000 multiple muon bundles. The charge ratio R-mu = N-mu+/N-mu- was measured separately for single and for multiple muon events. The analysis exploited the inversion of the magnet polarity which was performed on purpose during the 2012 Run. The combination of the two data sets with opposite magnet polarities allowed minimizing systematic uncertainties and reaching an accurate determination of the muon charge ratio. Data were fitted to obtain relevant parameters on the composition of primary cosmic rays and the associated kaon production in the forward fragmentation region. In the surface energy range 1-20 TeV investigated by OPERA, R-mu is well described by a parametric model including only pion and kaon contributions to themuon flux, showing no significant contribution of the prompt component. The energy independence supports the validity of Feynman scaling in the fragmentation region up to 200 TeV/nucleon primary energy.

    SPRINGER, 2014年07月02日, EUROPEAN PHYSICAL JOURNAL C, 74 (7), 2933, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe K, Aoki S, Hara T, Suzuki A, Takeuchi Y

    2014年05月08日, Phys. Rev. Lett., 112 (18), 181801 - 181801, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe, K., Adam, J., Aihara, H., Akiri, T., Andreopoulos, C., Aoki, S., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Barbi, M., Barker, G.J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Bentham, S.W., Berardi, V., Berger, B.E., Berkman, S., Bertram, I., Bhadra, S., Blaszczyk, F.d.M., Blondel, A., Bojechko, C., Bordoni, S., Boyd, S.B., Brailsford, D., Bravar, A., Bronner, C., Buchanan, N., Calland, R.G., Caravaca Rodriguez, J., Cartwright, S.L., Castillo, R., Catanesi, M.G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S.J., Collazuol, G., Connolly, K., Cremonesi, L., Dabrowska, A., Danko, I., Das, R., Davis, S., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S.R., Densham, C., Di Lodovico, F., Di Luise, S., Drapier, O., Duboyski, T., Duffy, K., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery, S., Ereditato, A., Escudero, L., Finch, A.J., Floetotto, L., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A.P., Galymov, V., Giffin, S., Giganti, C., Gilje, K., Goeldi, D., Golan, T., Gomez-Cadenas, J.J., Gonin, M., Grant, N., Gudin, D., Hadley, D.R., Haesler, A., Haigh, M.D., Hamilton, P., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N.C., Hayato, Y., Hearty, C., Helmer, R.L., Hierholzer, M., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Hirota, S., Holeczek, J., Horikawa, S., Huang, K., Ichikawa, A.K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Irvine, T.J., Ishida, T., Ishii, T., Ives, S.J., Iwai, E., Iyogi, K., Izmaylov, A., Jacob, A., Jamieson, B., Johnson, R.A., Jo, J.H., Jonsson, P., Jung, C.K., Kabirnezhad, M., Kaboth, A.C., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Kearns, E., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J., Kisiel, J., Kitching, P., Kobayashi, T., Koch, L., Kolaceke, A., Konaka, A., Kormos, L.L., Korzenev, A., Koseki, K., Koshio, Y., Kreslo, I., Kropp, W., Kubo, H., Kudenko, Y., Kumaratunga, S., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Lamont, I., Laveder, M., Lawe, M., Lazos, M., Lee, K.P., Lindner, T., Lister, C., Litchfield, R.P., Longhin, A., Ludovici, L., Macaire, M., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marino, A.D., Marteau, J., Martin, J.F., Maruyama, T., Marzec, J., Mathie, E.L., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K.S., McGrew, C., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C.A., Minamino, A., Mineev, O., Mine, S., Missert, A., Miura, M., Monfregola, L., Moriyama, S., Mueller, Th.A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nagasaki, T., Nakadaira, T., Nakahata, M., Nakai, T., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Naples, D., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., O'Keeffe, H.M., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S.M., Owen, R.A., Oyama, Y., Palladino, V., Paolone, V., Payne, D., Perevozchikov, O., Perkin, J.D., Petrov, Y., Pickard, L., Pinzon Guerra, E.S., Pistillo, C., Plonski, P., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J.-M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P.N., Ravonel, M., Rayner, M.A.M., Redij, A., Reeves, M., Reinherz-Aronis, E., Retiere, F., Robert, A., Rodrigues, P.A., Rojas, P., Rondio, E., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sakashita, K., Sanchez, F., Sato, F., Scantamburlo, E., Scholberg, K., Schoppmann, S., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smith, R.J., Smy, M., Sobczyk, J.T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Suda, Y., Suzuki, A., Suzuki, K., Suzuki, S.Y., Suzuki, Y., Szeglowski, T., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H.K., Tanaka, H.A., Tanaka, M.M., Terhorst, D., Terri, R., Thompson, L.F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Ueno, K., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Waldron, A.V., Walter, C.W., Wark, D., Wascko, M.O., Weber, A., Wendell, R., Wilkes, R.J., Wilking, M.J., Wilkinson, C., Williamson, Z., Wilson, J.R., Wilson, R.J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Yu, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E.D., Zito, M., Zmuda, J.

    2014年05月05日, Phys.Rev.D, 89 (9), 092003 - 092003, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Agafonova N, Aoki S, Hara T, Ozaki K, Rokujo H, Takahashi S

    The OPERA experiment is designed to search for nu(mu) -> nu(tau) oscillations in appearance mode, i.e., through the direct observation of the tau lepton in nu(tau)- charged current interactions. The experiment has taken data for five years, since 2008, with the CERN Neutrino to Gran Sasso beam. Previously, two nu(tau) candidates with a t decaying into hadrons were observed in a subsample of data of the 2008-2011 runs. Here we report the observation of a third nu(tau) candidate in the tau(-) -> mu(-) decay channel coming from the analysis of a subsample of the 2012 run. Taking into account the estimated background, the absence of nu(mu) -> nu(tau) oscillations is excluded at the 3.4 sigma level.

    AMER PHYSICAL SOC, 2014年03月05日, Phys. Rev. D, 89 (5), 51102, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe, K., Adam, J., Aihara, H., Akiri, T., Andreopoulos, C., Aoki, S., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Barbi, M., Barker, G.J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Bentham, S.W., Berardi, V., Berger, B.E., Berkman, S., Bertram, I., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bojechko, C., Bordoni, S., Boyd, S.B., Brailsford, D., Bravar, A., Bronner, C., Buchanan, N., Calland, R.G., Caravaca Rodriguez, J., Cartwright, S.L., Castillo, R., Catanesi, M.G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S.J., Collazuol, G., Connolly, K., Cremonesi, L., Dabrowska, A., Danko, I., Das, R., Davis, S., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S.R., Densham, C., Di Lodovico, F., Di Luise, S., Drapier, O., Duboyski, T., Duffy, K., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery, S., Ereditato, A., Escudero, L., Finch, A.J., Floetotto, L., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A.P., Galymov, V., Gaudin, A., Giffin, S., Giganti, C., Gilje, K., Goeldi, D., Golan, T., Gomez-Cadenas, J.J., Gonin, M., Grant, N., Gudin, D., Hadley, D.R., Haesler, A., Haigh, M.D., Hamilton, P., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N.C., Hayato, Y., Hearty, C., Helmer, R.L., Hierholzer, M., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Hirota, S., Holeczek, J., Horikawa, S., Huang, K., Ichikawa, A.K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Irvine, T.J., Ishida, T., Ishii, T., Ives, S.J., Iyogi, K., Izmaylov, A., Jacob, A., Jamieson, B., Johnson, R.A., Jo, J.H., Jonsson, P., Jung, C.K., Kaboth, A.C., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Kearns, E., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J., Kisiel, J., Kitching, P., Kobayashi, T., Koch, L., Kolaceke, A., Konaka, A., Kormos, L.L., Korzenev, A., Koseki, K., Koshio, Y., Kreslo, I., Kropp, W., Kubo, H., Kudenko, Y., Kumaratunga, S., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Lamont, I., Laveder, M., Lawe, M., Lazos, M., Lee, K.P., Licciardi, C., Lindner, T., Lister, C., Litchfield, R.P., Longhin, A., Ludovici, L., Macaire, M., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marino, A.D., Marteau, J., Martin, J.F., Maruyama, T., Marzec, J., Mathie, E.L., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K.S., McGrew, C., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C.A., Minamino, A., Mineev, O., Mine, S., Missert, A., Miura, M., Monfregola, L., Moriyama, S., Mueller, Th. A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nagasaki, T., Nakadaira, T., Nakahata, M., Nakai, T., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Naples, D., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., O'Keeffe, H.M., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S.M., Owen, R.A., Oyama, Y., Palladino, V., Paolone, V., Payne, D., Pearce, G.F., Perevozchikov, O., Perkin, J.D., Petrov, Y., Pickard, L.J., Pinzon Guerra, E.S., Pistillo, C., Plonski, P., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J.-M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P.N., Ravonel, M., Rayner, M.A.M., Redij, A., Reeves, M., Reinherz-Aronis, E., Retiere, F., Robert, A., Rodrigues, P.A., Rojas, P., Rondio, E., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sakashita, K., Sanchez, F., Sato, F., Scantamburlo, E., Scholberg, K., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smith, R.J., Smy, M., Sobczyk, J.T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Suda, Y., Suzuki, A., Suzuki, K., Suzuki, S.Y., Suzuki, Y., Szeglowski, T., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H.K., Tanaka, H.A., Tanaka, M.M., Terhorst, D., Terri, R., Thompson, L.F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Ueno, K., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Waldron, A.V., Walter, C.W., Wark, D., Wascko, M.O., Weber, A., Wendell, R., Wilkes, R.J., Wilking, M.J., Wilkinson, C., Williamson, Z., Wilson, J.R., Wilson, R.J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E.D., Zito, M., Zmuda, J.

    2014年02月10日, Phys.Rev.Lett., 112 (6), 061802 - 061802, 英語

    [査読有り]

    研究論文(学術雑誌)

  • N. Agafonova, A. Aleksandrov, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, T. Asada, D. Autiero, A. Badertscher, A. Ben Dhahbi, D. Bender, A. Bertolin, C. Bozza, R. Brugnera, G. Brunetti, B. Büttner, S. Buontempo, L. Chaussard, M. Chernyavskiy, V. Chiarella, A. Chukanov, L. Consiglio, N. D'Ambrosio, P. Del Amo Sanchez, G. De Lellis, M. De Serio, A. Di Crescenzo, D. Di Ferdinando, N. Di Marco, S. Dmitrievski, M. Dracos, D. Duchesneau, S. Dusini, J. Ebert, A. Ereditato, J. Favier, T. Ferber, R. A. Fini, T. Fukuda, A. Garfagnini, G. Giacomelli, C. Goellnitz, J. Goldberg, Y. Gornushkin, G. Grella, F. Grianti, A. M. Guler, C. Gustavino, C. Hagner, K. Hakamata, T. Hara, T. Hayakawa, M. Hierholzer, A. Hollnagel, B. Hosseini, H. Ishida, K. Ishiguro, M. Ishikawa, K. Jakovcic, C. Jollet, C. Kamiscioglu, M. Kamiscioglu, T. Katsuragawa, H. Kawahara, J. Kawada, J. H. Kim, S. H. Kim, M. Kimura, N. Kitagawa, B. Klicek, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, A. Lauria, J. Lenkeit, A. Ljubicic, A. Longhin, P. Loverre, A. Malgin, G. Mandrioli, J. Marteau, T. Matsuo, V. Matveev, N. Mauri, E. Medinaceli, A. Meregaglia, P. Migliozzi, S. Mikado, A. Minotti, M. Miyanishi, E. Miyashita, P. Monacelli, M. C. Montesi, K. Morishima, M. T. Muciaccia, N. Naganawa, T. Naka, M. Nakamura, T. Nakano, Y. Nakatsuka, K. Niwa, S. Ogawa, N. Okateva, A. Olshevsky, T. Omura, K. Ozaki, A. Paoloni, B. D. Park, I. G. Park, A. Pastore, L. Patrizii, E. Pennacchio, H. Pessard, C. Pistillo, D. Podgrudkov, N. Polukhina, M. Pozzato, K. Pretzl, F. Pupilli, R. Rescigno, M. Roda, T. Roganova, H. Rokujo, G. Rosa, I. Rostovtseva, A. Rubbia, A. Russo, O. Ryazhskaya, O. Sato, Y. Sato, A. Schembri, W. Schmidt-Parzefall, I. Shakiryanova, T. Schcedrina, A. Sheshukov, H. Shibuya, T. Shiraishi, G. Shoziyoev, S. Simone, M. Sioli, C. Sirignano, G. Sirri, M. Spinetti, L. Stanco, N. Starkov, S. M. Stellacci, M. Stipcevic, T. Strauss, P. Strolin, K. Suzuki, S. Takahashi, M. Tenti, F. Terranova, V. Tioukov, P. Tolun, S. Tufanli, P. Vilain, M. Vladimirov, L. Votano, J. L. Vuilleumier, G. Wilquet, B. Wonsak, C. S. Yoon, J. Yoshida, M. Yoshimoto, Y. Zaitsev, S. Zemskova, A. Zghiche

    Springer Heidelberg, 2014年, Journal of High Energy Physics, 2014 (4), 英語

    [査読有り]

    研究論文(学術雑誌)

  • K. Abe, N. Abgrall, H. Aihara, T. Akiri, C. Andreopoulos, S. Aoki, A. Ariga, T. Ariga, S. Assylbekov, D. Autiero, M. Barbi, G. J. Barker, G. Barr, M. Bassi, M. Batkiewicz, F. Bay, S. W. Bentham, V. Berardi, B. E. Berger, S. Berkman, I. Bertram, S. Bhadra, F. d. M. Blaszczyk, A. Blondel, C. Bojechko, S. B. Boyd, D. Brailsford, A. Bravar, C. Bronner, N. Buchanan, R. G. Calland, J. Caravaca Rodriguez, S. L. Cartwright, R. Castillo, M. G. Catanesi, A. Cervera, D. Cherdack, G. Christodoulou, A. Clifton, J. Coleman, S. J. Coleman, G. Collazuol, K. Connolly, L. Cremonesi, A. Curioni, A. Dabrowska, I. Danko, R. Das, S. Davisf, P. de Perio, G. De Rosa, T. Dealtry, S. R. Dennis, C. Densham, F. Di Lodovico, S. Di Luise, O. Drapier, T. Duboyski, F. Dufour, J. Dumarchez, S. Dytman, M. Dziewiecki, S. Emery, A. Ereditato, L. Escudero, A. J. Finch, E. Frank, M. Friend, Y. Fujii, Y. Fukuda, A. P. Furmanski, V. Galymov, A. Gaudin, S. Giffin, C. Giganti, K. Gilje, T. Golan, J. J. Gomez-Cadenas, M. Gonin, N. Grant, D. Gudin, D. R. Hadley, A. Haesler, M. D. Haigh, P. Hamilton, D. Hansen, T. Hara, M. Hartz, T. Hasegawa, N. C. Hastings, Y. Hayato, C. Hearty, R. L. Helmer, M. Hierholzer, J. Hignight, A. Hillairet, A. Himmel, T. Hiraki, S. Hirota, J. Holeczek, S. Horikawa, K. Huang, A. K. Ichikawa, K. Iekia, M. Ieva, M. Ikeda, J. Imber, J. Insler, T. J. Irvine, T. Ishida, T. Ishii, S. J. Ives, K. Iyogi, A. Izmaylov, A. Jacob, B. Jamieson, R. A. Johnson, J. H. Jo, P. Jonsson, K. K. Joo, C. K. Jung, A. C. Kaboth, T. Kajita, H. Kakuno, J. Kameda, Y. Kanazawa, D. Karlen, I. Karpikov, E. Kearns, M. Khabibullin, A. Khotjantsev, D. Kielczewska, T. Kikawa, A. Kilinski, J. Kim, S. B. Kim, J. Kisierl, P. Kitching, T. Kobayashi, G. Kogan, A. Kolaceke, A. Konaka, L. L. Kormos, A. Korzenev, K. Koseki, Y. Koshio, I. Kreslo, W. Kropp, H. Kubo, Y. Kudenko, S. Kumaratunga, R. Kurjata, T. Kutter, J. Lagoda, K. Laihem, M. Laveder, M. Lame, M. Lazos, K. P. Lee, C. Licciardi, I. T. Lim, T. Lindner, C. Lister, R. P. Litchfield, A. Longhin, G. D. Lopez, L. Ludovici, M. Macaire, L. Magaletti, K. Mahn, M. Malek, S. Manly, A. D. Marino, J. Marteau, J. F. Martin, T. Maruyama, J. Marzec, P. Masliah, E. L. Mathie, V. Matveev, K. Mavrokoridis, E. Mazzucato, N. McCauley, K. S. McFarland, C. McGrew, C. Metelko, P. Mijakowski, C. A. Miller, A. Minamino, O. Mineev, S. Mine, A. Missert, M. Miura, L. Monfregola, S. Moriyama, Th. A. Mueller, A. Murakami, M. Murdoch, S. Murphy, J. Myslik, T. Nagasaki, T. Nakadaira, M. Nakahata, T. Nakai, K. Nakamura, S. Nakayama, T. Nakaya, K. Nakayoshi, C. Nielsen, M. Nirkko, K. Nishikawa, Y. Nishimura, H. M. O'Keeffe, R. Ohta, K. Okumura, T. Okusawa, W. Oryszczak, S. M. Oser, M. Otani, R. A. Owen, Y. Oyama, M. Y. Pac, V. Palladino, V. Paolone, D. Payne, G. F. Pearce, O. Perevozchikov, J. D. Perkin, Y. Petrov, E. S. Pinzon Guerra, C. Pistillo, P. Plonski, E. Poplawska, B. Popov, M. Posiadala, J-M. Poutissou, R. Poutissou, P. Przewlocki, B. Quilain, E. Radicioni, P. N. Ratoff, M. Ravonel, M. A. M. Rayner, A. Redij, M. Reeves, E. Reinherz-Aronis, F. Retiere, A. Robert, P. A. Rodrigues, E. Rondio, S. Roth, A. Rubbia, D. Ruterbories, R. Sacco, K. Sakashita, F. Sanchez, E. Scantamburlo, K. Scholberg, J. Schwehr, M. Scott, Y. Seiya, T. Sekiguchi, H. Sekiya, D. Sgalaberna, M. Shiozawa, I. S. Short, Y. Shustrov, P. Sinclair, B. Smith, R. J. Smith, M. Smy, J. T. Sobczyk, H. Sobel, M. Sorel, L. Southwell, P. Stamoulis, J. Steinmann, B. Still, Y. Suda, A. Suzuki, K. Suzuki, S. Y. Suzuki, Y. Suzuki, T. Szeglowski, R. Tacik, M. Tada, S. Takahashi, A. Takeda, Y. Takeuchi, H. A. Tanaka, M. M. Tanaka, I. J. Taylor, D. Terhorst, R. Terri, L. F. Thompson, A. Thorley, S. Tobayama, W. Toki, T. Tomura, Y. Totsuka, C. Touramanis, T. Tsukamoto, M. Tzanov, Y. Uchida, K. Ueno, A. Vacheret, M. Vagins, G. Vasseur, T. Wachala, A. V. Waldron, C. W. Walter, D. Wark, M. O. Wascko, A. Weber, R. Wendell, R. J. Wilkes, M. J. Wilking, C. Wilkinson, Z. Williamson, J. R. Wilson, R. J. Wilson, T. Wongjirad, Y. Yamada, K. Yamamoto, C. Yanagisawa, S. Yen, N. Yershov, M. Yokoyama, T. Yuan, A. Zalewska, J. Zalipska, L. Zambelli, K. Zaremba, M. Ziembicki, E. D. Zimmerman, M. Zito, J. Zmuda

    The Tokai to Kamioka (T2K) experiment studies neutrino oscillations using a beam of muon neutrinos produced by an accelerator. The neutrinos travel from J-PARC on the east coast of Japan and are detected 295 kilometers further away in the Super-Kamiokande detector. A complex of near detectors located 280 meters away from the neutrino production target is used to better characterize the neutrino beam and reduce systematic uncertainties. The experiment aims at measuring electronic neutrino appearance (nu(mu) ->nu(e) oscillation) to measure the neutrino mixing angle theta(13), and muon neutrino disappearance to measure the neutrino mixing angle theta(23) and mass splitting vertical bar Delta m(32)(2)vertical bar. We report here electron neutrino appearance results using three years of data, recorded until the 2012 summer, as well as muon neutrino disappearance results based on the data coming from the first two years of the experiment.

    ELSEVIER SCIENCE BV, 2014年01月, NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS, 246, 23 - 28, 英語

    研究論文(国際会議プロシーディングス)

  • Abe, K., Abgrall, N., Aihara, H., Akiri, T., Andreopoulos, C., Aoki, S., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Barbi, M., Barker, G.J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Bentham, S.W., Berardi, V., Berger, B.E., Berkman, S., Bertram, I., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bojechko, C., Boyd, S.B., Brailsford, D., Bravar, A., Bronner, C., Buchanan, N., Calland, R.G., Caravaca Rodriguez, J., Cartwright, S.L., Castillo, R., Catanesi, M.G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S.J., Collazuol, G., Connolly, K., Cremonesi, L., Curioni, A., Dabrowska, A., Danko, I., Das, R., Davis, S., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S.R., Densham, C., Di Lodovico, F., Di Luise, S., Drapier, O., Duboyski, T., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery, S., Ereditato, A., Escudero, L., Finch, A.J., Frank, E., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A.P., Galymov, V., Gaudin, A., Giffin, S., Giganti, C., Gilje, K., Golan, T., Gomez-Cadenas, J.J., Gonin, M., Grant, N., Gudin, D., Hadley, D.R., Haesler, A., Haigh, M.D., Hamilton, P., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N.C., Hayato, Y., Hearty, C., Helmer, R.L., Hierholzer, M., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Hirota, S., Holeczek, J., Horikawa, S., Huang, K., Ichikawa, A.K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Irvine, T.J., Ishida, T., Ishii, T., Ives, S.J., Iyogi, K., Izmaylov, A., Jacob, A., Jamieson, B., Johnson, R.A., Jo, J.H., Jonsson, P., Joo, K.K., Jung, C.K., Kaboth, A.C., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Kearns, E., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J., Kim, S.B., Kisiel, J., Kitching, P., Kobayashi, T., Kogan, G., Kolaceke, A., Konaka, A., Kormos, L.L., Korzenev, A., Koseki, K., Koshio, Y., Kreslo, I., Kropp, W., Kubo, H., Kudenko, Y., Kumaratunga, S., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Laveder, M., Lawe, M., Lazos, M., Lee, K.P., Licciardi, C., Lim, I.T., Lindner, T., Lister, C., Litchfield, R.P., Longhin, A., Lopez, G.D., Ludovici, L., Macaire, M., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marino, A.D., Marteau, J., Martin, J.F., Maruyama, T., Marzec, J., Masliah, P., Mathie, E.L., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCauley, N., McFarland, K.S., McGrew, C., Metelko, C., Mijakowski, P., Miller, C.A., Minamino, A., Mineev, O., Mine, S., Missert, A., Miura, M., Monfregola, L., Moriyama, S., Mueller, Th. A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nagasaki, T., Nakadaira, T., Nakahata, M., Nakai, T., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., O'Keeffe, H.M., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S.M., Otani, M., Owen, R.A., Oyama, Y., Pac, M.Y., Palladino, V., Paolone, V., Payne, D., Pearce, G.F., Perevozchikov, O., Perkin, J.D., Petrov, Y., Pinzon Guerra, E.S., Pistillo, C., Plonski, P., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J.M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P.N., Ravonel, M., Rayner, M.A.M., Redij, A., Reeves, M., Reinherz-Aronis, E., Retiere, F., Robert, A., Rodrigues, P.A., Rondio, E., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sakashita, K., Sanchez, F., Scantamburlo, E., Scholberg, K., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smith, R.J., Smy, M., Sobczyk, J.T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Suda, Y., Suzuki, A., Suzuki, K., Suzuki, S.Y., Suzuki, Y., Szeglowski, T., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H.A., Tanaka, M.M., Taylor, I.J., Terhorst, D., Terri, R., Thompson, L.F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Ueno, K., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Waldron, A.V., Walter, C.W., Wark, D., Wascko, M.O., Weber, A., Wendell, R., Wilkes, R.J., Wilking, M.J., Wilkinson, C., Williamson, Z., Wilson, J.R., Wilson, R.J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E.D., Zito, M., Zmuda, J.

    2013年11月19日, Phys.Rev.Lett., 111 (21), 211803 - 211803, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Agafonova N, Aoki S, Hara T, Ozaki K, Rokujo H, Takahashi S

    The OPERA neutrino experiment is designed to perform the first observation of neutrino oscillations in direct appearance mode in the nu(mu) -> nu(tau) channel, via the detection of the tau-leptons created in charged current nu(tau) interactions. The detector, located in the underground Gran Sasso Laboratory, consists of an emulsion/lead target with an average mass of about 1.2 kt, complemented by electronic detectors. It is exposed to the CERN Neutrinos to Gran Sasso beam, with a baseline of 730 km and a mean energy of 17 GeV. The observation of the first nu(tau) candidate event and the analysis of the 2008-2009 neutrino sample have been reported in previous publications. This work describes substantial improvements in the analysis and in the evaluation of the detection efficiencies and backgrounds using new simulation tools. The analysis is extended to a sub-sample of 2010 and 2011 data, resulting from an electronic detector-based pre-selection, in which an additional nu(tau) candidate has been observed. The significance of the two events in terms of a nu(mu) -> nu(tau) oscillation signal is of 2.40 sigma.

    SPRINGER, 2013年11月, JHEP, 1311 (11), 36, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe, K., Abgrall, N., Aihara, H., Akiri, T., Albert, J.B., Andreopoulos, C., Aoki, S., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Barbi, M., Barker, G.J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Bentham, S.W., Berardi, V., Berger, B.E., Berkman, S., Bertram, I., Beznosko, D., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bojechko, C., Boyd, S., Brailsford, D., Bravar, A., Bronner, C., Brook-Roberge, D.G., Buchanan, N., Calland, R.G., Caravaca Rodriguez, J., Cartwright, S.L., Castillo, R., Catanesi, M.G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S.J., Collazuol, G., Connolly, K., Cremonesi, L., Curioni, A., Dabrowska, A., Danko, I., Das, R., Davis, S., Day, M., de Andre, J.P.A.M., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S., Densham, C., Di Lodovico, F., Di Luise, S., Dobson, J., Drapier, O., Duboyski, T., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Dziomba, M., Emery, S., Ereditato, A., Escudero, L., Finch, A.J., Frank, E., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A., Galymov, V., Gaudin, A., Giffin, S., Giganti, C., Gilje, K., Golan, T., Gomez-Cadenas, J.J., Gonin, M., Grant, N., Gudin, D., Hadley, D.R., Haesler, A., Haigh, M.D., Hamilton, P., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N.C., Hayato, Y., Hearty, C., Helmer, R.L., Hierholzer, M., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Hirota, S., Holeczek, J., Horikawa, S., Huang, K., Ichikawa, A.K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Irvine, T.J., Ishida, T., Ishii, T., Ives, S.J., Iyogi, K., Izmaylov, A., Jacob, A., Jamieson, B., Johnson, R.A., Jo, J.H., Jonsson, P., Joo, K.K., Jung, C.K., Kaboth, A., Kaji, H., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Kearns, E., Khabibullin, M., Khanam, F., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J.Y., Kim, J., Kim, S.B., Kirby, B., Kisiel, J., Kitching, P., Kobayashi, T., Kogan, G., Kolaceke, A., Konaka, A., Kormos, L.L., Korzenev, A., Koseki, K., Koshio, Y., Kowalik, K., Kreslo, I., Kropp, W., Kubo, H., Kudenko, Y., Kumaratunga, S., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Laing, A., Laveder, M., Lawe, M., Lazos, M., Lee, K.P., Licciardi, C., Lim, I.T., Lindner, T., Lister, C., Litchfield, R.P., Longhin, A., Lopez, G.D., Ludovici, L., Macaire, M., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marchionni, A., Marino, A.D., Marteau, J., Martin, J.F., Maruyama, T., Marzec, J., Masliah, P., Mathie, E.L., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCauley, N., McFarland, K.S., McGrew, C., McLachlan, T., Messina, M., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C.A., Minamino, A., Mineev, O., Mine, S., Missert, A., Miura, M., Monfregola, L., Moriyama, S., Mueller, Th. A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nagasaki, T., Nakadaira, T., Nakahata, M., Nakai, T., Nakajima, K., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Naples, D., Nicholls, T.C., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., O'Keeffe, H.M., Obayashi, Y., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S.M., Otani, M., Owen, R.A., Oyama, Y., Pac, M.Y., Palladino, V., Paolone, V., Payne, D., Pearce, G.F., Perevozchikov, O., Perkin, J.D., Petrov, Y., Pinzon Guerra, E.S., Plonski, P., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J.-M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P.N., Ravonel, M., Rayner, M.A.M., Reeves, M., Reinherz-Aronis, E., Retiere, F., Robert, A., Rodrigues, P.A., Rondio, E., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sakashita, K., Sanchez, F., Scantamburlo, E., Scholberg, K., Schwehr, J., Scott, M., Scully, D.I., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shibata, M., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smith, R.J., Smy, M., Sobczyk, J.T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Suzuki, A., Suzuki, K., Suzuki, S.Y., Suzuki, Y., Szeglowski, T., Szeptycka, M., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H.A., Tanaka, M.M., Tanaka, M., Taylor, I.J., Terhorst, D., Terri, R., Thompson, L.F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Ueno, K., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Waldron, A.V., Walter, C.W., Wark, D., Wascko, M.O., Weber, A., Wendell, R., Wilkes, R.J., Wilking, M.J., Wilkinson, C., Williamson, Z., Wilson, J.R., Wilson, R.J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Zalewska, A., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E.D., Zito, M., Zmuda, J.

    2013年08月05日, Phys.Rev.D, 88 (3), 032002 - 032002, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Ahn J.K, Aoki S

    A hybrid experiment with nuclear emulsion and scintillating-fiber detectors (KEK-E373) has been performed to search for double-strangeness systems. Among about 10(3) events of Xi(-) hyperons captured at rest by emulsion nuclei, we have observed four events which clearly show the topology of cascade weak decays of double-Lambda hypernuclei including the "Nagara" event. Regarding the Nagara event, values of the two-Lambda binding energy (B-Lambda Lambda) and the Lambda-Lambda interaction energy (Delta B-Lambda Lambda) of He-6(Lambda Lambda) have been revised to 6.91 +/- 0.16 and 0.67 +/- 0.17 MeV, respectively, due to the recent change of the Xi(-) mass value (Particle Data Group). For another three events, we have determined possible species of double-Lambda hypernuclei together with their binding energies.

    AMER PHYSICAL SOC, 2013年07月, Phys. Lett. C, 88 (1), 14003, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe, K., Abgrall, N., Aihara, H., Akiri, T., Albert, J.B., Andreopoulos, C., Aoki, S., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Barbi, M., Barker, G.J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Bentham, S.S., Berardi, V., Berger, B.E., Berkman, S., Bertram, I., Beznosko, D., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bojechko, C., Boyd, S., Bravar, A., Bronner, C., Brook-Roberge, D.G., Buchanan, N., Calland, R.G., Caravaca Rodriguez, J., Cartwright, S., Castillo, R., Catanesi, M.G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S.J., Collazuol, G., Connolly, K., Cremonesi, L., Curioni, A., Dabrowska, A., Danko, I., Das, R., Davis, S., Day, M.A., de Andre, J.P.A.M., de Perio, P., De Rosa, G., Dealtry, T., Densham, C., Di Lodovico, F., Di Luise, S., Dobson, J., Drapier, O., Duboyski, T., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Dziomba, M., Emery, S., Ereditato, A., Escudero, L., Esposito, L.S., Finch, A.J., Frank, E., Friend, M., Fujii, Y., Fukuda, Y., Galymov, V., Gaudin, A., Giffin, S., Giganti, C., Gilje, K., Golan, T., Gomez-Cadenas, J.J., Gonin, M., Grant, N., Gudin, D., Guzowski, P., Hadley, D.R., Haesler, A., Haigh, M.D., Hamilton, P., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N.C., Hayato, Y., Hearty, C., Helmer, R.L., Hierholzer, Martin, Hignight, J., Hillairet, A., Hiraki, T., Holeczek, J., Horikawa, S., Huang, K., Hyndman, A., Ichikawa, A.K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Ishida, T., Ishii, T., Ives, S.J., Iyogi, K., Izmaylov, A., Jamieson, B., Johnson, R.A., Jo, J.H., Jonsson, P., Joo, K.K., Jung, C.K., Kaji, H., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Kearns, E., Khabibullin, M., Khanam, F., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J.Y., Kim, J., Kim, S.B., Kirby, B., Kisiel, J., Kitching, P., Kobayashi, T., Kogan, G., Konaka, A., Kormos, L.L., Korzenev, A., Koseki, K., Koshio, Y., Kowalik, K., Kreslo, I., Kropp, W., Kubo, H., Kudenko, Y., Kumaratunga, S., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Laing, A., Laveder, M., Lawe, M., Lee, K.P., Licciardi, C., Lim, I.T., Lindner, T., Lister, C., Litchfield, R.P., Longhin, A., Lopez, G.D., Ludovici, L., Macaire, M., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marchionni, A., Marino, A.D., Marteau, J., Martin, J.F., Maruyama, T., Marzec, J., Masliah, P., Mathie, E.L., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCauley, N., McFarland, K.S., McGrew, C., McLachlan, T., Messina, M., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C.A., Minamino, A., Mineev, O., Mine, S., Missert, A., Miura, M., Monfregola, L., Moriyama, S., Mueller, T., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nagasaki, T., Nakadaira, T., Nakahata, M., Nakai, T., Nakajima, K., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Naples, D., Nicholls, T.C., Nielsen, C., Nishikawa, K., Nishimura, Y., O'Keeffe, H.M., Obayashi, Y., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S.M., Otani, M., Owen, R.A., Oyama, Y., Pac, M.Y., Palladino, V., Paolone, V., Payne, D., Pearce, G.F., Perevozchikov, O., Perkin, J.D., Pinzon Guerra, E.S., Plonski, P., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J.M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P.N., Ravonel, M., Rayner, M.A., Reeves, M., Reinherz-Aronis, E., Retiere, F., Rodrigues, P.A., Rondio, E., Rossi, B., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sakashita, K., Sanchez, F., Scantamburlo, E., Scholberg, K., Schwehr, J., Scott, M., Scully, D.I., Seiya, Y., Sekiguchi, T., Sekiya, H., Shibata, M., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smith, R.J., Smy, M., Sobczyk, J.T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Suzuki, A., Suzuki, K., Suzuki, S.Y., Suzuki, Y., Szeglowski, T., Szeptycka, M., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H.A., Tanaka, M.M., Tanaka, M., Taylor, I.J., Terhorst, D., Terri, R., Thompson, L.F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Ueno, K., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Waldron, A.V., Walter, C.W., Wang, J., Wark, D., Wascko, M.O., Weber, A., Wendell, R., Wilkes, R.J., Wilking, M.J., Wilkinson, C., Williamson, Z., Wilson, J.R., Wilson, R.J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Zalewska, A., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E.D., Zito, M., Zmuda, J.

    2013年05月07日, Phys.Rev.D, 87 (9), 092003 - 092003, 英語

    [査読有り]

    研究論文(学術雑誌)

  • H. Rokujo, S. Aoki, S. Takahashi, K. Kamada, S. Mizutani, R. Nakagawa, K. Ozaki

    To observe gamma-ray sources precisely, a balloon-borne experiment with a new type of detector, the emulsion gamma-ray telescope, is planned. A multi-stage shifter mechanism based on the concept of an analog clock serves as a time stamper with subsecond time resolution and uses multiple moving stages mounted on the emulsion chambers. This new technique was employed in a test experiment using a small-scale model in a short-duration balloon flight. Tracks recorded in nuclear emulsion were read by a fully automated scanning system, were reconstructed, and time information were assigned by analysis of their position displacements in the shifter layers. The estimated time resolution was 0.06-0.15 s. The number of tracks passing through the detector was counted every second, and hadron jets were detected as significant excesses observed in the counting rate. In future, the multi-stage shifter is greatly contributing to ongoing efforts to increase the effective area of emulsion gamma-ray telescopes. (C) 2012 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2013年02月, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 701, 127 - 132, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe, K., Abgrall, N., Aihara, H., Akiri, T., Albert, J.B., Andreopoulos, C., Aoki, S., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Barbi, M., Barker, G.J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Bentham, S.S., Berardi, V., Berger, B.E., Berkman, S., Bertram, I., Beznosko, D., Bhadra, S., Blaszczyk, F.d.M., Blondel, A., Bojechko, C., Boyd, S., Bravar, A., Bronner, C., Brook-Roberge, D.G., Buchanan, N., Calland, R.G., Caravaca Rodriguez, J., Cartwright, S.L., Castillo, R., Catanesi, M.G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S.J., Collazuol, G., Connolly, K., Curioni, A., Dabrowska, A., Danko, I., Das, R., Davis, S., Day, M.A., de Andre, J.P.A.M., de Perio, P., De Rosa, G., Dealtry, T., Densham, C., Di Lodovico, F., Di Luise, S., Dobson, J., Duboyski, T., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Dziomba, M., Emery, S., Ereditato, A., Escudero, L., Esposito, L.S., Finch, A.J., Frank, E., Friend, M., Fujii, Y., Fukuda, Y., Galymov, V., Gaudin, A., Giffin, S., Giganti, C., Gilje, K., Golan, T., Gomez-Cadenas, J.J., Gonin, M., Grant, N., Gudin, D., Guzowski, P., Hadley, D.R., Haesler, A., Haigh, M.D., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N.C., Hayato, Y., Hearty, C., Helmer, R.L., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Holeczek, J., Horikawa, S., Huang, K., Hyndman, A., Ichikawa, A.K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Ishida, T., Ishii, T., Ives, S.J., Iyogi, K., Izmaylov, A., Jamieson, B., Johnson, R.A., Jo, J.H., Jonsson, P., Joo, K.K., Jover-Manas, G.V., Jung, C.K., Kaji, H., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Kearns, E., Khabibullin, M., Khanam, F., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J.Y., Kim, J., Kim, S.B., Kirby, B., Kisiel, J., Kitching, P., Kobayashi, T., Kogan, G., Konaka, A., Kormos, L.L., Korzenev, A., Koseki, K., Koshio, Y., Kowalik, K., Kreslo, I., Kropp, W., Kubo, H., Kudenko, Y., Kumaratunga, S., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Laing, A., Laveder, M., Lawe, M., Lee, K.P., Licciardi, C., Lim, I.T., Lindner, T., Lister, C., Litchfield, R.P., Lopez, G.D., Ludovici, L., Macaire, M., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marchionni, A., Marino, A.D., Marteau, J., Martin, J.F., Maruyama, T., Marzec, J., Masliah, P., Mathie, E.L., Matsumura, C., Matsuoka, K., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCauley, N., McFarland, K.S., McGrew, C., McLachlan, T., Messina, M., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C.A., Minamino, A., Mineev, O., Mine, S., Missert, A., Miura, M., Monfregola, L., Moriyama, S., Mueller, T., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nagasaki, T., Nakadaira, T., Nakahata, M., Nakai, T., Nakajima, K., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Naples, D., Nicholls, T.C., Nielsen, C., Nishikawa, K., Nishimura, Y., O'Keeffe, H.M., Obayashi, Y., Ohta, R., Okumura, K., Oryszczak, W., Oser, S.M., Otani, M., Owen, R.A., Oyama, Y., Pac, M.Y., Palladino, V., Paolone, V., Payne, D., Pearce, G.F., Perevozchikov, O., Perkin, J.D., Guerra, E.S.Pinzon, Plonski, P., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J.M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P.N., Ravonel, M., Rayner, M.A., Reeves, M., Reinherz-Aronis, E., Retiere, F., Rodrigues, P.A., Rondio, E., Rossi, B., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sakashita, K., Sanchez, F., Scantamburlo, E., Scholberg, K., Schwehr, J., Scott, M., Scully, D.I., Seiya, Y., Sekiguchi, T., Sekiya, H., Shibata, M., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smith, R.J., Smy, M., Sobczyk, J.T., Sobel, H., Sorel, M., Stamoulis, P., Steinmann, J., Still, B., Sulej, R., Suzuki, A., Suzuki, K., Suzuki, S.Y., Suzuki, Y., Szeglowski, T., Szeptycka, M., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H.A., Tanaka, M., Tanaka, M.M., Taylor, I., Terhorst, D., Terri, R., Thompson, L.F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Ueno, K., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Waldron, A.V., Walter, C.W., Wang, J., Wark, D., Wascko, M.O., Weber, A., Wendell, R., Wikstrom, G., Wilkes, R.J., Wilking, M.J., Wilkinson, C., Williamson, Z., Wilson, J.R., Wilson, R.J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Zalewska, A., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E.D., Zito, M., Zmuda, J.

    2013年01月02日, Phys.Rev.D, 87 (1), 012001 - 012001, 英語

    [査読有り]

    研究論文(学術雑誌)

  • N. Agafonova, A. Aleksandrov, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, D. Autiero, A. Badertscher, A.Ben Dhahbi, A. Bertolin, C. Bozza, R. Brugnera, F. Brunet, G. Brunetti, B. Buettner, S. Buontempo, L. Chaussard, M. Chernyavsky, V. Chiarella, A. Chukanov, L. Consiglio, N. D'Ambrosio, G. De Lellis, M. De Serio, P. del Amo Sanchez, A. Di Crescenzo, D. Di Ferdinando, N. Di Marco, S. Dmitrievsky, M. Dracos, D. Duchesneau, S. Dusini, T. Dzhatdoev, J. Ebert, A. Ereditato, T. Ferber, R. A. Fini, T. Fukuda, A. Garfagnini, G. Giacomelli, C. Goellnitz, J. Goldberg, Y. Gornushkin, G. Grella, F. Grianti, A. M. Guler, C. Gustavino, C. Hagner, K. Hamada, T. Hara, M. Hierholzer, A. Hollnagel, B. Hosseini, H. Ishida, K. Ishiguro, K. Jakovcic, C. Jollet, F. Juget, C. Kamiscioglu, M. Kamiscioglu, J. Kawada, J. H. Kim, S. H. Kim, M. Kimura, N. Kitagawa, B. Klicek, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, A. Lauria, J. Lenkeit, A. Ljubicic, A. Longhin, P. Loverre, A. Malgin, C. Mancini-Terracciano, G. Mandrioli, J. Marteau, T. Matsuo, V. Matveev, N. Mauri, E. Medinaceli, F. W. Meisel, A. Meregaglia, P. Migliozzi, S. Mikado, A. Minotti, P. Monacelli, M. C. Montesi, K. Morishima, M. T. Muciaccia, M. Nakamura, T. Nakano, Y. Nakatsuka, D. Naumov, K. Niwa, S. Ogawa, N. Okateva, A. Olchevsky, T. Omura, K. Ozaki, A. Paoloni, B. D. Park, I. G. Park, A. Pastore, L. Patrizii, E. Pennacchio, H. Pessard, C. Pistillo, D. Podgrudkov, N. Polukhina, M. Pozzato, K. Pretzl, F. Pupilli, R. Rescigno, M. Roda, T. Roganova, H. Rokujo, G. Rosa, I. Rostovtseva, A. Rubbia, A. Russo, O. Ryazhskaya, O. Sato, Y. Sato, T. Schchedrina, A. Schembri, W. Schmidt-Parzefall, I. Shakiryanova, A. Sheshukov, H. Shibuya, T. Shiraishi, G. Shoziyoev, S. Simone, M. Sioli, C. Sirignano, G. Sirri, M. Spinetti, L. Stanco, N. Starkov, S. M. Stellacci, M. Stipcevic, T. Strauss, P. Strolin, K. Suzuki, S. Takahashi, M. Tenti, F. Terranova, V. Tioukov, P. Tolun, S. Tufanli, P. Vilain, M. Vladimirov, L. Votano, J. L. Vuilleumier, G. Wilquet, B. Wonsak, C. S. Yoon, J. Yoshida, Y. Zaitsev, S. Zemskova, A. Zghiche

    2013年, Journal of High Energy Physics, 1 - 3, 英語

    [査読有り]

    研究論文(学術雑誌)

  • GRAINE project: The observation of cosmic gamma-rays with balloon-borne emulsion telescope

    Satoru Takahashi, Shigeki Aoki, Kaname Hamada, Toshio Hara, Katsumi Ishiguro, Atsushi Iyono, Keiki Kamada, Hiroaki Kawahara, Nobuko Kitagawa, Koichi Kodama, Ryousuke Komatani, Masahiro Komatsu, Motoaki Miyanishi, Fukashi Mizutani, Saki Mizutani, Kunihiro Morishima, Naotaka Naganawa, Tatsuhiro Naka, Ryo Nakagawa, Yuji Nakatsuka, Mitsuhiro Nakamura, Toshiyuki Nakano, Kimio Niwa, Keita Ozaki, Hiroki Rokujo, Takashi Sako, Yoshitaka Saito, Osamu Sato, Yoshihiro Sato, Atsumu Suzuki, Kazuya Suzuki, Satoru Takahashi, Keisuke Tamura, Ikuo Tezuka, Junya Yoshida, Tetsuya Yoshida

    © 2013 Sociedade Brasileira de Fisica. All Rights Reserved. We are promoting the project of 10MeV-100GeV cosmic gamma-ray observation with precise (0.08deg@1-2GeV) and polarization sensitive large aperture area (∼10m2) emulsion telescope by repeating long duration balloon flights. We call this project GRAINE (Gamma-Ray Astro-Imager with Nuclear Emulsion). An overview and the status of the GRAINE project are described.

    2013年, Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013, 2013-October

    [査読有り]

    研究論文(国際会議プロシーディングス)

  • GRAINE project: The first demonstration of emulsion gamma-ray telescope in 2011 balloon experiment

    Shigeki Aoki, Kaname Hamada, Toshio Hara, Katsumi Ishiguro, Atsushi Iyono, Keiki Kamada, Hiroaki Kawahara, Nobuko Kitagawa, Koichi Kodama, Ryousuke Komatani, Masahiro Komatsu, Motoaki Miyanishi, Fukashi Mizutani, Saki Mizutani, Kunihiro Morishima, Naotaka Naganawa, Tatsuhiro Naka, Ryo Nakagawa, Yuji Nakatsuka, Mitsuhiro Nakamura, Toshiyuki Nakano, Kimio Niwa, Keita Ozaki, Hiroki Rokujo, Takashi Sako, Yoshitaka Saito, Osamu Sato, Yoshihiro Sato, Atsumu Suzuki, Kazuya Suzuki, Satoru Takahashi, Keisuke Tamura, Ikuo Tezuka, Junya Yoshida, Tetsuya Yoshida

    © 2013 Sociedade Brasileira de Fisica. All Rights Reserved. We are furthering our GRAINE project. This balloon experiment was performed using a telescope with a 12.5cm×10cm aperture area and a 4.3hour (1.6hours@35km) flight duration in 2011. Working tests of each element and connection tests between elements were performed. Atmospheric gamma-ray flux was measured. The first demonstration of an emulsion gamma-ray telescope was described using flight data in our 2011 balloon experiment.

    2013年, Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013, 2013-October

    [査読有り]

    研究論文(国際会議プロシーディングス)

  • S. Aoki, G. Barr, M. Batkiewicz, J. Blocki, J. D. Brinson, W. Coleman, A. Dabrowska, I. Danko, M. Dziewiecki, B. Ellison, L. Golyshkin, R. Gould, T. Hara, J. Haremza, B. Hartfiel, J. Holeczek, A. Izmaylov, M. Khabibullin, A. Khotjantsev, D. Kielczewska, A. Kilinski, J. Kisiel, Y. Kudenko, N. Kulkarni, R. Kurjata, T. Kutter, J. Lagoda, J. Liu, J. Marzec, W. Metcalf, C. Metelko, P. Mijakowski, O. Mineev, D. Naples, M. Nauman, T. C. Nicholls, D. Northacker, J. Nowak, M. Noy, V. Paolone, G. F. Pearce, O. Perevozchikov, M. Posiadala, P. Przewlocki, W. Qian, M. Raymond, J. Reid, E. Rondio, E. Shabalin, M. Siyad, D. Smith, J. Sobczyk, M. Stodulski, R. Sulej, J. Swierblewski, A. T. Suzuki, T. Szeglowski, M. Szeptycka, M. Thorpe, T. Wachala, D. Warner, A. Weber, T. Yano, N. Yershov, A. Zalewska, K. Zaremba, M. Ziembicki

    The T2K experiment is a long baseline neutrino oscillation experiment aiming to observe the appearance of v(e) in a v(mu) beam. The v(mu) beam is produced at the Japan Proton Accelerator Research Complex (J-PARC), observed with the 295 km distant Super-Kamiokande Detector and monitored by a suite of near detectors at 280 m from the proton target. The near detectors include a magnetized off-axis detector (ND280) which measures the unoscillated neutrino flux and neutrino cross-sections. The present paper describes the outermost component of ND280 which is a Side Muon Range Detector (SMRD) composed of scintillation counters with embedded wavelength shifting fibers and Multi-Pixel Photon Counter readout. The components, performance and response of the SMRD are presented. (c) 2012 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2013年01月, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 698, 135 - 146, 英語

    [査読有り]

    研究論文(学術雑誌)

  • T. Adam, N. Agafonova, A. Aleksandrov, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, D. Autiero, A. Badertscher, A. Ben Dhahbi, M. Beretta, A. Bertolin, C. Bozza, T. Brugiere, R. Brugnera, F. Brunet, G. Brunetti, B. Buettner, S. Buontempo, B. Carlus, F. Cavanna, A. Cazes, L. Chaussard, M. Chernyavsky, V. Chiarella, A. Chukanov, N. D'Ambrosio, G. De Lellis, M. De Serio, P. del Amo Sanchez, A. Di Crescenzo, D. Di Ferdinando, N. Di Marco, S. Dmitrievsky, M. Dracos, D. Duchesneau, S. Dusini, T. Dzhatdoev, J. Ebert, A. Ereditato, L. S. Esposito, J. Favier, G. Felici, T. Ferber, R. A. Fini, T. Fukuda, A. Garfagnini, G. Giacomelli, C. Girerd, C. Goellnitz, J. Goldberg, D. Golubkov, Y. Gornushkin, G. Grella, F. Grianti, C. Guerin, A. M. Guler, C. Gustavino, C. Hagner, K. Hamada, T. Hara, M. Hierholzer, A. Hollnagel, H. Ishida, K. Ishiguro, K. Jakovcic, C. Jollet, C. Kamiscioglu, M. Kamiscioglu, J. Kawada, J. H. Kim, S. H. Kim, M. Kimura, N. Kitagawa, B. Klicek, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, A. Lauria, C. Lazzaro, J. Lenkeit, A. Ljubicic, A. Longhin, A. Malgin, C. Mancini-Terracciano, G. Mandrioli, J. Marteau, T. Matsuo, V. Matveev, N. Mauri, E. Medinaceli, A. Meregaglia, P. Migliozzi, S. Mikado, P. Monacelli, M. C. Montesi, K. Morishima, U. Moser, M. T. Muciaccia, M. Nakamura, T. Nakano, Y. Nakatsuka, D. Naumov, V. Nikitina, S. Ogawa, A. Olchevsky, K. Ozaki, O. Palamara, A. Paoloni, B. D. Park, I. G. Park, A. Pastore, L. Patrizii, E. Pennacchio, H. Pessard, C. Pistillo, D. Podgrudkov, N. Polukhina, M. Pozzato, K. Pretzl, F. Pupilli, R. Rescigno, M. Roda, T. Roganova, H. Rokujo, G. Rosa, I. Rostovtseva, A. Rubbia, A. Russo, O. Ryazhskaya, O. Sato, Y. Sato, A. Schembri, W. Schmidt-Parzefall, J. Schuler, I. Shakiryanova, A. Sheshukov, H. Shibuya, G. Shoziyoev, S. Simone, M. Sioli, C. Sirignano, G. Sirri, J. S. Song, M. Spinetti, L. Stanco, N. Starkov, S. M. Stellacci, M. Stipcevic, T. Strauss, S. Takahashi, M. Tenti, F. Terranova, V. Tioukov, P. Tolun, S. Tufanli, P. Vilain, M. Vladimirov, L. Votano, J. -L. Vuilleumier, G. Wilquet, B. Wonsak, J. Wurtz, C. S. Yoon, J. Yoshida, Y. Zaitsev, S. Zemskova, A. Zghiche, R. Zimmermann

    In spring 2012 CERN provided two weeks of a short bunch proton beam dedicated to the neutrino velocity measurement over a distance of 730 km. The OPERA neutrino experiment at the underground Gran Sasso Laboratory used an upgraded setup compared to the 2011 measurements, improving the measurement time accuracy. An independent timing system based on the Resistive Plate Chambers was exploited providing a time accuracy of similar to 1 ns. Neutrino and anti-neutrino contribution were separated using the information provided by the OPERA magnetic spectrometers. The new analysis profited from the precision geodesy measurements of the neutrino beaseline and of the CNGS/LNGS clock synchronization. The neutrino arrival time with respect to the one computed assuming the speed of light in vacuum is found to be delta t(nu) equivalent to TOFc - TOF nu = (0.6 +/- 0.4 (stat.)+/- 3.0 (syst.)) and delta t((nu) over bar) equivalent to TOFc-TOF(nu) over bar = (1.7 +/- 1.4 (stat.)+/- 3.1 (syst.)) ns for nu(mu) and (nu) over bar (mu), respectively. This corresponds to a limit on the muon neutrino velocity with respect to the speed of light of -1.8 x 10(-6) < (V-nu - c)/c < 2.3 x 10(-6) at 90% C.L. This new measurement confirms with higher accuracy the revised OPERA result.

    SPRINGER, 2013年01月, JOURNAL OF HIGH ENERGY PHYSICS, 1301 (1), 153, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Agafonova N, Aoki S, Hara T, Ozaki K, Rokujo H, Takahashi S

    A first result of the search for νμ → νe oscillations in the OPERA experiment, located at the Gran Sasso Underground Laboratory, is presented. The experiment looked for the appearance of νe in the CNGS neutrino beam using the data collected in 2008 and 2009. Data are compatible with the non-oscillation hypothesis in the three-flavour mixing model. A further analysis of the same data constrains the non-standard oscillation parameters θnew and Δm new 2 suggested by the LSND and MiniBooNE experiments. For large Δ Δmnew 2 values (> 0.1 eV 2), the OPERA 90% C.L. upper limit on sin2(2θ new) based on a Bayesian statistical method reaches the value 7.2 × 10-3. © 2013 SISSA.

    2013年, JHEP, 2013 (7), 4, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe, K., Abgrall, N., Ajima, Y., Aihara, H., Albert, J.B., Constantinos Andreopoulos, Andrieu, B., Anerella, M.D., Aoki, S., Araoka, O., Argyriades, J., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Badertscher, A., Barbi, M., Barker, G.J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Bentham, S., Vincenzo Berardi, Berger, B.E., Bertram, I., Besnier, M., Beucher, J., Beznosko, D., Bhadra, S., Blaszczyk, F.d.M., Blocki, J., Blondel, A., Bojechko, C., Bouchez, J., Boyd, S.B., Bravar, A., Bronner, C., Brook-Roberge, D.G., Buchanan, N., Budd, H., Calvet, D., Cartwright, S.L., Carver, A., Castillo, R., Catanesi, M.G., Cazes, A., Cervera, A., Chavez, C., Choi, S., Christodoulou, G., Coleman, J., Gianmaria Collazuol, Coleman, W., Connolly, K., Curioni, A., Dabrowska, A., Danko, I., Das, R., Davies, G.S., Davis, S., Day, M., Gianfranca De Rosa, de Andre, J.P.A.M., de Perio, P., Thomas James Dealtry, Delbart, A., Densham, C., Di Lodovico, F., Di Luise, S., Dinh Tran, P., Dobson, J., Dore, U., Drapier, O., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Dziomba, M., Emery, S., Ereditato, A., Escallier, J.E., Escudero, L., Esposito, L.S., Fechner, M., Ferrero, A., Finch, A.J., Frank, E., Fujii, Y., Fukuda, Y., Galymov, V., Ganetis, G.L., Gannaway, F.C., Gaudin, A., Gendotti, A., George, M., Giffin, S., Giganti, C., Gilje, K., Ghosh, A.K., Golan, T., Goldhaber, M., Gomez-Cadenas, J.J., Gomi, S., Gonin, M., Grant, N., Grant, A., Gumplinger, P., Guzowski, P., Haesler, A., Haigh, M.D., Hamano, K., Hansen, C., Hansen, D., Hara, T., Harrison, P.F., Hartfiel, B., Hartz, M., Haruyama, T., Hasegawa, T., Hastings, N.C., Hatzikoutelis, A., Hayashi, K., Hayato, Y., Christopher Hearty, Helmer, R.L., Henderson, R., Higashi, N., Hignight, J., Hillairet, A., Hirose, E., Holeczek, J., Horikawa, S., Hyndman, A., Ichikawa, A.K., Ieki, K., Ieva, M., Iida, M., Ikeda, M., Ilic, J., Imber, J., Ishida, T., Ishihara, C., Ishii, T., Ives, S.J., Iwasaki, M., Iyogi, K., Izmaylov, A., Jamieson, B., Johnson, R.A., Joo, K.K., Jover-Manas, G.V., Jung, C.K., Kaji, H., Kajita, T., Hidekazu Kakuno, Kameda, J., Kaneyuki, K., Karlen, D., Kasami, K., Kato, I., Kawamuko, H., Kearns, E., Khabibullin, M., Khanam, F., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kim, J., Kim, J.Y., Kim, S.B., Kimura, N., Kirby, B., Kisiel, J., Kitching, P., Takashi Kobayashi, Kogan, G., Koike, S., Konaka, A., Kormos, L.L., Alexander Korzenev, Koseki, K., Koshio, Y., Kouzuma, Y., Kowalik, K., Kravtsov, V., Kreslo, I., Kropp, W., Kubo, H., Kubota, J., Kudenko, Y., Kulkarni, N., Kurimoto, Y., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Marco Laveder, Lee, K.P., Le, P.T., Levy, J.M., Licciardi, C., Lim, I.T., Lindner, T., Litchfield, R.P., Litos, M., Andrea Longhin, Lopez, G.D., Loverre, P.F., Lucio Ludovici, Lux, T., Macaire, M., Mahn, K., Makida, Y., Malek, M., Manly, S., Marchionni, A., Marino, A.D., Marone, A.J., Jacques MARTEAU, John Martin, Maruyama, T., Maryon, T., Marzec, J., Masliah, P., Mathie, E.L., Matsumura, C., Matsuoka, K., Matveev, V., Konstantinos Mavrokoridis, Mazzucato, E., McCauley, N., Kevin McFarland, McGrew, C., McLachlan, T., Messina, M., Metcalf, W., Metelko, C., Mauro Mezzetto, Mijakowski, P., Miller, C.A., Minamino, A., Mineev, O., Mine, S., Missert, A.D., Mituka, G., Miura, M., Mizouchi, K., Monfregola, L., Moreau, F., Morgan, B., Moriyama, S., Muir, A., Murakami, A., Muratore, J.F., Murdoch, M., Murphy, S., Myslik, J., Nagai, N., Nakadaira, T., Nakahata, M., Nakai, T., Nakajima, K., Nakamoto, T., Nakamura, K., Nakayama, S., Nakaya, T., Naples, D., Navin, M.L., Nelson, B., Nicholls, T.C., Nielsen, C., Nishikawa, K., Nishino, H., Nitta, K., Nobuhara, T., Nowak, J.A., Obayashi, Y., Ogitsu, T., Ohhata, H., Okamura, T., Okumura, K., Okusawa, T., Oser, S.M., Otani, M., Owen, R.A., Oyama, Y., Ozaki, T., Pac, M.Y., Vittorio Palladino, Paolone, V., Paul, P., Payne, D., Pearce, G.F., Perkin, J.D., Valerio Pettinacci, Pierre, F., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J.M., Poutissou, R., Przewlocki, P., Weiming Qian, Raaf, J.L., Emilio Radicioni, Ratoff, P.N., Raufer, T.M., Ravonel, M., Raymond, M., Retiere, F., Robert, A., Rodrigues, P.A., Rondio, E., Roney, J.M., Biagio Rossi, Stefan Roth, Rubbia, A., Ruterbories, D., Sabouri, S., Sacco, R., Sakashita, K., Federico Sanchez Nieto, Sarrat, A., Sasaki, K., Scholberg, K., Schwehr, J., Scott, M., Scully, D.I., Yoshihiro Seiya, Tetsuro Sekiguchi, Hiroyuki Sekiya, Shibata, M., Shimizu, Y., Shiozawa, M., Short, S., Siyad, M., Smith, R.J., Smy, M., Sobczyk, J.T., Sobel, H., Sorel, M., Achim Stahl, Stamoulis, P., Steinmann, J., Still, B., Stone, J., Stodulski, M., Strabel, C., Sulej, R., Suzuki, A., Suzuki, K., Suzuki, S., Suzuki, S.Y., Suzuki, Y., Suzuki, Y., Swierblewski, J., Szeglowski, T., Szeptycka, M., Tacik, R., Tada, M., Taguchi, M., Takahashi, S., Takeda, A., Takenaga, Y., Takeuchi, Y., Tanaka, K., H. A. Tanaka, Tanaka, M., Tanaka, M.M., Tanimoto, N., Tashiro, K., Taylor, I., Terashima, A., Terhorst, D., Terri, R., Thompson, L.F., Thorley, A., Toki, W., Tobayama, S., Tomaru, T., Totsuka, Y., Christos Touramanis, Tsukamoto, T., Tzanov, M., Yoshi Uchida, Ueno, K., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Walding, J.J., Waldron, A.V., Walter, C.W., Wanderer, P.J., Wang, J., Ward, M.A., Ward, G.P., Wark, D., Morgan Wascko, Alfons Weber, Wendell, R., West, N., Leigh Whitehead, Wikström, G., Wilkes, R.J., Wilking, M.J., Williamson, Z., Wilson, J.R., Robert Wilson, Wongjirad, T., Yamada, S., Yamada, Y., Yamamoto, A., Yamamoto, K., Yamanoi, Y., Yamaoka, H., Yamauchi, T., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Masashi Yokoyama, Yuan, T., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E.D., Zito, M., Zmuda, J.

    2012年12月, Nucl.Instrum.Meth.A, 694, 211 - 223, 英語

    [査読有り]

    研究論文(学術雑誌)

  • T. Adam, N. Agafonova, A. Aleksandrov, O. Altinok, P. Alvarez Sanchez, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, D. Autiero, A. Badertscher, A. Ben Dhahbi, A. Bertolin, C. Bozza, T. Brugiere, R. Brugnera, F. Brunet, G. Brunetti, S. Buontempo, B. Carlus, F. Cavanna, A. Cazes, L. Chaussard, M. Chernyavsky, V. Chiarella, A. Chukanov, G. Colosimo, M. Crespi, N. D'Ambrosio, G. De Lellis, M. De Serio, Y. Declais, P. del Amo Sanchez, F. Di Capua, A. Di Crescenzo, D. Di Ferdinando, N. Di Marco, S. Dmitrievsky, M. Dracos, D. Duchesneau, S. Dusini, T. Dzhatdoev, J. Ebert, I. Efthymiopoulos, O. Egorov, A. Ereditato, L. S. Esposito, J. Favier, T. Ferber, R. A. Fini, T. Fukuda, A. Garfagnini, G. Giacomelli, M. Giorgini, M. Giovannozzi, C. Girerd, J. Goldberg, C. Goellnitz, D. Golubkov, L. Goncharova, Y. Gornushkin, G. Grella, F. Grianti, E. Gschwendtner, C. Guerin, A. M. Guler, C. Gustavino, C. Hagner, K. Hamada, T. Hara, R. Enikeev, M. Hierholzer, A. Hollnagel, M. Ieva, H. Ishida, K. Ishiguro, K. Jakovcic, C. Jollet, M. Jones, F. Juget, M. Kamiscioglu, J. Kawada, S. H. Kim, M. Kimura, E. Kiritsis, N. Kitagawa, B. Klicek, J. Knuesel, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, C. Lazzaro, J. Lenkeit, A. Ljubicic, A. Longhin, A. Malgin, G. Mandrioli, J. Marteau, T. Matsuo, V. Matveev, N. Mauri, A. Mazzoni, E. Medinaceli, F. Meisel, A. Meregaglia, P. Migliozzi, S. Mikado, D. Missiaen, P. Monacelli, K. Morishima, U. Moser, M. T. Muciaccia, N. Naganawa, T. Naka, M. Nakamura, T. Nakano, Y. Nakatsuka, D. Naumov, V. Nikitina, F. Nitti, S. Ogawa, N. Okateva, A. Olchevsky, O. Palamara, A. Paoloni, B. D. Park, I. G. Park, A. Pastore, L. Patrizii, E. Pennacchio, H. Pessard, C. Pistillo, N. Polukhina, M. Pozzato, K. Pretzl, F. Pupilli, R. Rescigno, F. Riguzzi, T. Roganova, H. Rokujo, G. Rosa, I. Rostovtseva, A. Rubbia, A. Russo, V. Ryasny, O. Ryazhskaya, O. Sato, Y. Sato, Z. Sahnoun, A. Schembri, J. Schuler, L. Scotto Lavina, J. Serrano, I. Shakiryanova, A. Sheshukov, H. Shibuya, G. Shoziyoev, S. Simone, M. Sioli, C. Sirignano, G. Sirri, J. S. Song, M. Spinetti, L. Stanco, N. Starkov, S. Stellacci, M. Stipcevic, T. Strauss, S. Takahashi, M. Tenti, F. Terranova, I. Tezuka, V. Tioukov, P. Tolun, N. T. Tran, S. Tufanli, P. Vilain, M. Vladimirov, L. Votano, J. -L. Vuilleumier, G. Wilquet, B. Wonsak, J. Wurtz, V. Yakushev, C. S. Yoon, J. Yoshida, Y. Zaitsev, S. Zemskova, A. Zghiche

    The OPERA neutrino experiment at the underground Gran Sasso Laboratory has measured the velocity of neutrinos from the CERN CNGS beam over a baseline of about 730 km. The measurement is based on data taken by OPERA in the years 2009, 2010 and 2011. Dedicated upgrades of the CNGS timing system and of the OPERA detector, as well as a high precision geodesy campaign for the measurement of the neutrino baseline, allowed reaching comparable systematic and statistical accuracies. An arrival time of CNGS muon neutrinos with respect to the one computed assuming the speed of light in vacuum of (6.5 +/- 7.4 (stat.)(-8.0)(+8.3)(sys.)) ns was measured corresponding to a relative difference of the muon neutrino velocity with respect to the speed of light (v - c)/c = (2.7 +/- 3.1 (stat.)(-3.3)(+1.34)(sys.)) x 10(-6). The above result, obtained by comparing the time distributions of neutrino interactions and of protons hitting the CNGS target in 10.5 mu s long extractions, was confirmed by a test performed at the end of 2011 using a short bunch beam allowing to measure the neutrino time of flight at the single interaction level.

    SPRINGER, 2012年10月, JOURNAL OF HIGH ENERGY PHYSICS, Vol. 1210, p. 093 (10), 英語

    [査読有り]

    研究論文(学術雑誌)

  • Agafonova N, Aoki S, Hara T, Rokujo H

    The OPERA neutrino experiment in the underground Gran Sasso Laboratory (LNGS) was designed to perform the first detection of neutrino oscillations in direct appearance mode in the nu(mu) -> nu(tau) channel, the nu(tau) signature being the identification of the tau-lepton created in its charged current interaction. The hybrid apparatus consists of a large mass emulsion film/lead target complemented by electronic detectors. Placed in the LNGS, it is exposed to the high-energy long-baseline CERN Neutrino beam to Gran Sasso (CNGS) 730 km away from the neutrino source. The observation of a first nu(tau) candidate event was reported in 2010. In this paper, we discuss the result of the analysis of the data taken during the first two years of operation (2008-2009) underlining the major improvements brought to the analysis chain and to the Monte Carlo simulations. The statistical significance of the one event observed so far is then evaluated to 95%.

    IOP PUBLISHING LTD, 2012年03月, New J. Phys., 14, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe, K., Abgrall, N., Ajima, Y., Aihara, H., Albert, J.B., Andreopoulos, C., Andrieu, B., Anerella, M.D., Aoki, S., Araoka, O., Argyriades, J., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Badertscher, A., Barbi, M., Barker, G.J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Bentham, S., Berardi, V., Berger, B.E., Bertram, I., Besnier, M., Beucher, J., Beznosko, D., Bhadra, S., Blaszczyk, F.d.M., Blondel, A., Bojechko, C., Bouchez, J., Boyd, S.B., Bravar, A., Bronner, C., Brook-Roberge, D.G., Buchanan, N., Budd, H., Calland, R., Calvet, D., Caravaca Rodriguez, J., Cartwright, S.L., Carver, A., Castillo, R., Catanesi, M.G., Cazes, A., Cervera, A., Chavez, C., Choi, S., Christodoulou, G., Coleman, J., Collazuol, G., Coleman, W., Connolly, K., Curioni, A., Dabrowska, A., Danko, I., Das, R., Davies, G.S., Davis, S., Day, M., De Rosa, G., de Andre, J.P.A.M., de Perio, P., Dealtry, T., Delbart, A., Densham, C., Di Lodovico, F., Di Luise, S., Tran, P.Dinh, Dobson, J., Dore, U., Drapier, O., Duboyski, T., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Dziomba, M., Emery, S., Ereditato, A., Escallier, J.E., Escudero, L., Esposito, L.S., Fechner, M., Ferrero, A., Finch, A.J., Frank, E., Fujii, Y., Fukuda, Y., Galymov, V., Ganetis, G.L., Gannaway, F.C., Gaudin, A., Gendotti, A., George, M.A., Giffin, S., Giganti, C., Gilje, K., Ghosh, A.K., Golan, T., Goldhaber, M., Gomez-Cadenas, J.J., Gomi, S., Gonin, M., Grant, N., Grant, A., Gumplinger, P., Guzowski, P., Hadley, D.R., Haesler, A., Haigh, M.D., Hamano, K., Hansen, C., Hansen, D., Hara, T., Harrison, P.F., Hartfiel, B., Hartz, M., Haruyama, T., Hasegawa, T., Hastings, N.C., Hatzikoutelis, A., Hayashi, K., Hayato, Y., Hearty, C., Helmer, R.L., Henderson, R., Higashi, N., Hignight, J., Hillairet, A., Hiraki, T., Hirose, E., Holeczek, J., Horikawa, S., Huang, K., Hyndman, A., Ichikawa, A.K., Ieki, K., Ieva, M., Iida, M., Ikeda, M., Ilic, J., Imber, J., Ishida, T., Ishihara, C., Ishii, T., Ives, S.J., Iwasaki, M., Iyogi, K., Izmaylov, A., Jamieson, B., Johnson, R.A., Joo, K.K., Jover-Manas, G.V., Jung, C.K., Kaji, H., Kajita, T., Kakuno, H., Kameda, J., Kaneyuki, K., Karlen, D., Kasami, K., Kato, I., Kawamuko, H., Kearns, E., Khabibullin, M., Khanam, F., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kim, J., Kim, J.Y., Kim, S.B., Kimura, N., Kirby, B., Kisiel, J., Kitching, P., Kobayashi, T., Kogan, G., Koike, S., Konaka, A., Kormos, L.L., Korzenev, A., Koseki, K., Koshio, Y., Kouzuma, Y., Kowalik, K., Kravtsov, V., Kreslo, I., Kropp, W., Kubo, H., Kubota, J., Kudenko, Y., Kulkarni, N., Kurimoto, Y., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Laveder, M., Lawe, M., Lee, K.P., Le, P.T., Levy, J.M., Licciardi, C., Lim, I.T., Lindner, T., Lister, C., Litchfield, R.P., Litos, M., Longhin, A., Lopez, G.D., Loverre, P.F., Ludovici, L., Lux, T., Macaire, M., Magaletti, L., Mahn, K., Makida, Y., Malek, M., Manly, S., Marchionni, A., Marino, A.D., Marone, A.J., Marteau, J., Martin, J.F., Maruyama, T., Maryon, T., Marzec, J., Masliah, P., Mathie, E.L., Matsumura, C., Matsuoka, K., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCauley, N., McFarland, K.S., McGrew, C., McLachlan, T., Messina, M., Metcalf, W., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C.A., Minamino, A., Mineev, O., Mine, S., Missert, A.D., Mituka, G., Miura, M., Mizouchi, K., Monfregola, L., Moreau, F., Morgan, B., Moriyama, S., Muir, A., Murakami, A., Muratore, J.F., Murdoch, M., Murphy, S., Myslik, J., Nagai, N., Nakadaira, T., Nakahata, M., Nakai, T., Nakajima, K., Nakamoto, T., Nakamura, K., Nakayama, S., Nakaya, T., Naples, D., Navin, M.L., Nicholls, T.C., Nielsen, B., Nielsen, C., Nishikawa, K., Nishino, H., Nitta, K., Nobuhara, T., Nowak, J.A., Obayashi, Y., Ogitsu, T., Ohhata, H., Okamura, T., Okumura, K., Okusawa, T., Oser, S.M., Otani, M., Owen, R.A., Oyama, Y., Ozaki, T., Pac, M.Y., Palladino, V., Paolone, V., Paul, P., Payne, D., Pearce, G.F., Perkin, J.D., Pettinacci, V., Pierre, F., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J.M., Poutissou, R., Przewlocki, P., Qian, W., Raaf, J.L., Radicioni, E., Ratoff, P.N., Raufer, T.M., Ravonel, M., Raymond, M., Retiere, F., Robert, A., Rodrigues, P.A., Rondio, E., Roney, J.M., Rossi, B., Roth, S., Rubbia, A., Ruterbories, D., Sabouri, S., Sacco, R., Sakashita, K., Sanchez, F., Sarrat, A., Sasaki, K., Scholberg, K., Schwehr, J., Scott, M., Scully, D.I., Seiya, Y., Sekiguchi, T., Sekiya, H., Shibata, M., Shimizu, Y., Shiozawa, M., Short, S., Sinclair, P.D., Siyad, M., Smith, B.M., Smith, R.J., Smy, M., Sobczyk, J.T., Sobel, H., Sorel, M., Stahl, A., Stamoulis, P., Steinmann, J., Still, B., Stone, J., Strabel, C., Sulej, R., Suzuki, A., Suzuki, K., Suzuki, S., Suzuki, S.Y., Suzuki, Y., Suzuki, Y., Szeglowski, T., Szeptycka, M., Tacik, R., Tada, M., Taguchi, M., Takahashi, S., Takeda, A., Takenaga, Y., Takeuchi, Y., Tanaka, K., Tanaka, H.A., Tanaka, M., Tanaka, M.M., Tanimoto, N., Tashiro, K., Taylor, I., Terashima, A., Terhorst, D., Terri, R., Thompson, L.F., Thorley, A., Toki, W., Tobayama, S., Tomaru, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Ueno, K., Vacheret, A., Vagins, M., Vasseur, G., Veledar, O., Wachala, T., Walding, J.J., Waldron, A.V., Walter, C.W., Wanderer, P.J., Wang, J., Ward, M.A., Ward, G.P., Wark, D., Wascko, M.O., Weber, A., Wendell, R., West, N., Whitehead, L.H., Wikstrom, G., Wilkes, R.J., Wilking, M.J., Williamson, Z., Wilson, J.R., Wilson, R.J., Wongjirad, T., Yamada, S., Yamada, Y., Yamamoto, A., Yamamoto, K., Yamanoi, Y., Yamaoka, H., Yamauchi, T., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E.D., Zito, M., Zmuda, J.

    2012年02月22日, Phys.Rev.D, 85, 031103 - 031103, 英語

    [査読有り]

    研究論文(学術雑誌)

  • N. Agafonova, A. Aleksandrov, O. Altinok, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, D. Autiero, A. Badertscher, A. Bagulya, A. Ben Dhahbi, A. Bertolin, M. Besnier, C. Bozza, T. Brugiere, R. Brugnera, F. Brunet, G. Brunetti, S. Buontempo, A. Cazes, L. Chaussard, M. Chernyavskiy, V. Chiarella, A. Chukanov, N. D'Ambrosio, F. Dal Corso, G. De Lellis, P. del Amo Sanchez, Y. Declais, M. De Serio, F. Di Capua, A. Di Crescenzo, D. Di Ferdinando, N. Di Marco, S. Dmitrievski, M. Dracos, D. Duchesneau, S. Dusini, T. Dzhatdoev, J. Ebert, O. Egorov, R. Enikeev, A. Ereditato, L. S. Esposito, J. Favier, T. Ferber, R. A. Fini, D. Frekers, T. Fukuda, A. Garfagnini, G. Giacomelli, M. Giorgini, C. Goellnitz, J. Goldberg, D. Golubkov, L. Goncharova, Y. Gornushkin, G. Grella, F. Grianti, A. M. Guler, C. Gustavino, C. Hagner, K. Hamada, T. Hara, M. Hierholzer, A. Hollnagel, K. Hoshino, M. Ieva, H. Ishida, K. Jakovcic, C. Jollet, F. Juget, M. Kamiscioglu, K. Kazuyama, S. H. Kim, M. Kimura, N. Kitagawa, B. Klicek, J. Knuesel, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, H. Kubota, C. Lazzaro, J. Lenkeit, I. Lippi, A. Ljubicic, A. Longhin, P. Loverre, G. Lutter, A. Malgin, G. Mandrioli, K. Manai, J. Marteau, T. Matsuo, V. Matveev, N. Mauri, E. Medinaceli, F. Meisel, A. Meregaglia, P. Migliozzi, S. Mikado, S. Miyamoto, P. Monacelli, K. Morishima, U. Moser, M. T. Muciaccia, N. Naganawa, T. Naka, M. Nakamura, T. Nakano, D. Naumov, V. Nikitina, K. Niwa, Y. Nonoyama, S. Ogawa, N. Okateva, A. Olshevskiy, M. Paniccia, A. Paoloni, B. D. Park, I. G. Park, A. Pastore, L. Patrizii, E. Pennacchio, H. Pessard, K. Pretzl, V. Pilipenko, C. Pistillo, N. Polukhina, M. Pozzato, F. Pupilli, R. Rescigno, T. Roganova, H. Rokujo, G. Romano, G. Rosa, I. Rostovtseva, A. Rubbia, A. Russo, V. Ryasny, O. Ryazhskaya, O. Sato, Y. Sato, A. Schembri, W. Schmidt-Parzefall, H. Schroeder, L. Scotto Lavina, A. Sheshukov, H. Shibuya, G. Shoziyoev, S. Simone, M. Sioli, C. Sirignano, G. Sirri, J. S. Song, M. Spinetti, L. Stanco, N. Starkov, M. Stipcevic, T. Strauss, P. Strolin, S. Takahashi, M. Tenti, F. Terranova, I. Tezuka, V. Tioukov, P. Tolun, A. Trabelsi, T. Tran, S. Tufanli, P. Vilain, M. Vladimirov, L. Votano, J. L. Vuilleumier, G. Wilquet, B. Wonsak, V. Yakushev, C. S. Yoon, T. Yoshioka, J. Yoshida, Y. Zaitsev, S. Zemskova, A. Zghiche, R. Zimmermann

    A new method of momentum measurement of charged particles through multiple Coulomb scattering (MCS) in the OPERA lead-emulsion target is presented. It is based on precise measurements of track angular deviations carried out thanks to the very high resolution of nuclear emulsions. The algorithm has been tested with Monte Carlo pions. The results are found to

    IOP PUBLISHING LTD, 2012年01月, NEW JOURNAL OF PHYSICS, 14, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe, K., Abgrall, N., Aihara, H., Ajima, Y., Albert, J.B., Allan, D., Amaudruz, P.-A., Andreopoulos, C., Andrieu, B., Anerella, M.D., Angelsen, C., Aoki, S., Araoka, O., Argyriades, J., Ariga, A., Ariga, T., Assylbekov, S., de Andre, J.P.A.M., Autiero, D., Badertscher, A., Ballester, O., Barbi, M., Barker, G.J., Baron, P., Barr, G., Bartoszek, L., Batkiewicz, M., Bay, F., Bentham, S., Berardi, V., Berger, B.E., Berns, H., Bertram, I., Besnier, M., Beucher, J., Beznosko, D., Bhadra, S., Birney, P., Bishop, D., Blackmore, E., Blaszczyk, F.d.M., Blocki, J., Blondel, A., Bodek, A., Bojechko, C., Bouchez, J., Boussuge, T., Boyd, S.B., Boyer, M., Braam, N., Bradford, R., Bravar, A., Briggs, K., Brinson, J.D., Bronner, C., Brook-Roberge, D.G., Bryant, M., Buchanan, N., Budd, H., Cadabeschi, M., Calland, R.G., Calvet, D., Caravaca Rodriguez, J., Carroll, J., Cartwright, S.L., Carver, A., Castillo, R., Catanesi, M.G., Cavata, C., Cazes, A., Cervera, A., Charrier, J.P., Chavez, C., Choi, S., Chollet, S., Christodoulou, G., Colas, P., Coleman, J., Coleman, W., Collazuol, G., Connolly, K., Cooke, P., Curioni, A., Dabrowska, A., Danko, I., Das, R., Davies, G.S., Davis, S., Day, M., De La Broise, X., de Perio, P., De Rosa, G., Dealtry, T., Debraine, A., Delagnes, E., Delbart, A., Densham, C., Di Lodovico, F., Di Luise, S., Dinh Tran, P., Dobson, J., Doornbos, J., Dore, U., Drapier, O., Druillole, F., Dufour, F., Dumarchez, J., Durkin, T., Dytman, S., Dziewiecki, M., Dziomba, M., Ellison, B., Emery, S., Ereditato, A., Escallier, J.E., Escudero, L., Esposito, L.S., Faszer, W., Fechner, M., Ferrero, A., Finch, A., Fisher, C., Fitton, M., Flight, R., Forbush, D., Frank, E., Fransham, K., Fujii, Y., Fukuda, Y., Gallop, M., Galymov, V., Ganetis, G.L., Gannaway, F.C., Gaudin, A., Gaweda, J., Gendotti, A., George, M., Giffin, S., Giganti, C., Gilje, K., Giomataris, I., Giraud, J., Ghosh, A.K., Golan, T., Goldhaber, M., Gomez-Cadenas, J.J., Gomi, S., Gonin, M., Goyette, M., Grant, A., Grant, N., Granena, F., Greenwood, S., Gumplinger, P., Guzowski, P., Haigh, M.D., Hamano, K., Hansen, C., Hara, T., Harrison, P.F., Hartfiel, B., Hartz, M., Haruyama, T., Hasanen, R., Hasegawa, T., Hastings, N.C., Hastings, S., Hatzikoutelis, A., Hayashi, K., Hayato, Y., Haycock, T.D.J., Hearty, C., Helmer, R.L., Henderson, R., Herlant, S., Higashi, N., Hignight, J., Hiraide, K., Hirose, E., Holeczek, J., Honkanen, N., Horikawa, S., Hyndman, A., Ichikawa, A.K., Ieki, K., Ieva, M., Iida, M., Ikeda, M., Ilic, J., Imber, J., Ishida, T., Ishihara, C., Ishii, T., Ives, S.J., Iwasaki, M., Iyogi, K., Izmaylov, A., Jamieson, B., Johnson, R.A., Joo, K.K., Jover-Manas, G., Jung, C.K., Kaji, H., Kajita, T., Kakuno, H., Kameda, J., Kaneyuki, K., Karlen, D., Kasami, K., Kasey, V., Kato, I., Kawamuko, H., Kearns, E., Kellett, L., Khabibullin, M., Khaleeq, M., Khan, N., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kim, J.Y., Kim, S.-B., Kimura, N., Kirby, B., Kisiel, J., Kitching, P., Kobayashi, T., Kogan, G., Koike, S., Komorowski, T., Konaka, A., Kormos, L.L., Korzenev, A., Koseki, K., Koshio, Y., Kouzuma, Y., Kowalik, K., Kravtsov, V., Kreslo, I., Kropp, W., Kubo, H., Kubota, J., Kudenko, Y., Kulkarni, N., Kurchaninov, L., Kurimoto, Y., Kurjata, R., Kurosawa, Y., Kutter, T., Lagoda, J., Laihem, K., Langstaff, R., Laveder, M., Lawson, T.B., Le, P.T., Le Coguie, A., Le Ross, M., Lee, K.P., Lenckowski, M., Licciardi, C., Lim, I.T., Lindner, T., Litchfield, R.P., Longhin, A., Lopez, G.D., Lu, P., Ludovici, L., Lux, T., Macaire, M., Magaletti, L., Mahn, K., Makida, Y., Malafis, C.J., Malek, M., Manly, S., Marchionni, A., Mark, C., Marino, A.D., Marone, A.J., Marteau, J., Martin, J.F., Maruyama, T., Maryon, T., Marzec, J., Masliah, P., Mathie, E.L., Matsumura, C., Matsuoka, K., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCauley, N., McFarland, K.S., McGrew, C., McLachlan, T., Mercer, I., Messina, M., Metcalf, W., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C.A., Minamino, A., Mineev, O., Mine, S., Minvielle, R.E., Mituka, G., Miura, M., Mizouchi, K., Mols, J.-P., Monfregola, L., Monmarthe, E., Moreau, F., Morgan, B., Moriyama, S., Morris, D., Muir, A., Murakami, A., Muratore, J.F., Murdoch, M., Murphy, S., Myslik, J., Nagashima, G., Nakadaira, T., Nakahata, M., Nakamoto, T., Nakamura, K., Nakayama, S., Nakaya, T., Naples, D., Nelson, B., Nicholls, T.C., Nishikawa, K., Nishino, H., Nitta, K., Nizery, F., Nowak, J.A., Noy, M., Obayashi, Y., Ogitsu, T., Ohhata, H., Okamura, T., Okumura, K., Okusawa, T., Ohlmann, C., Olchanski, K., Openshaw, R., Oser, S.M., Otani, M., Owen, R.A., Oyama, Y., Ozaki, T., Pac, M.Y., Palladino, V., Paolone, V., Paul, P., Payne, D., Pearce, G.F., Pearson, C., Perkin, J.D., Pfleger, M., Pierre, F., Pierrepont, D., Plonski, P., Poffenberger, P., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J.-M., Poutissou, R., Preece, R., Przewlocki, P., Qian, W., Raaf, J.L., Radicioni, E., Ramos, K., Ratoff, P., Raufer, T.M., Ravonel, M., Raymond, M., Retiere, F., Richards, D., Ritou, J.-L., Robert, A., Rodrigues, P.A., Rondio, E., Roney, M., Rooney, M., Ross, D., Rossi, B., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sadler, S., Sakashita, K., Sanchez, F., Sarrat, A., Sasaki, K., Schaack, P., Schmidt, J., Scholberg, K., Schwehr, J., Scott, M., Scully, D.I., Seiya, Y., Sekiguchi, T., Sekiya, H., Sheffer, G., Shibata, M., Shimizu, Y., Shiozawa, M., Short, S., Siyad, M., Smith, D., Smith, R.J., Smy, M., Sobczyk, J., Sobel, H., Sooriyakumaran, S., Sorel, M., Spitz, J., Stahl, A., Stamoulis, P., Star, O., Statter, J., Stawnyczy, L., Steinmann, J., Steffens, J., Still, B., Stodulski, M., Stone, J., Strabel, C., Strauss, T., Sulej, R., Sutcliffe, P., Suzuki, A., Suzuki, K., Suzuki, S., Suzuki, S.Y., Suzuki, Y., Suzuki, Y., Swierblewski, J., Szeglowski, T., Szeptycka, M., Tacik, R., Tada, M., Tadepalli, A.S., Taguchi, M., Takahashi, S., Takeda, A., Takenaga, Y., Takeuchi, Y., Tanaka, H.A., Tanaka, K., Tanaka, M., Tanaka, M.M., Tanimoto, N., Tashiro, K., Taylor, I.J., Terashima, A., Terhorst, D., Terri, R., Thompson, L.F., Thorley, A., Thorpe, M., Toki, W., Tomaru, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tvaskis, V., Tzanov, M., Uchida, Y., Ueno, K., Usseglio, M., Vacheret, A., Vagins, M., Van Schalkwyk, J.F., Vanel, J.-C., Vasseur, G., Veledar, O., Vincent, P., Wachala, T., Waldron, A.V., Walter, C.W., Wanderer, P.J., Ward, M.A., Ward, G.P., Wark, D., Warner, D., Wascko, M.O., Weber, A., Wendell, R., Wendland, J., West, N., Whitehead, L.H., Wikstrom, G., Wilkes, R.J., Wilking, M.J., Williamson, Z., Wilson, J.R., Wilson, R.J., Wong, K., Wongjirad, T., Yamada, S., Yamada, Y., Yamamoto, A., Yamamoto, K., Yamanoi, Y., Yamaoka, H., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Zalewska, A., Zalipska, J., Zaremba, K., Ziembicki, M., Zimmerman, E.D., Zito, M., Zmuda, J.

    2011年12月11日, Nucl.Instrum.Meth.A, 659, 106 - 135, 英語

    [査読有り]

    研究論文(学術雑誌)

  • A. Kayis-Topaksu, G. Onengut, R. van Dantzig, M. de Jong, R. G. C. Oldeman, M. Guler, U. Kose, P. Tolun, M. G. Catanesi, M. T. Muciaccia, K. Winter, B. Van de Vyver, P. Vilain, G. Wilquet, B. Saitta, E. Di Capua, S. Ogawa, H. Shibuya, I. R. Hristova, T. Kawamura, D. Kolev, H. Meinhard, J. Panman, A. Rozanov, R. Tsenov, J. W. E. Uiterwijk, P. Zucchelli, J. Goldberg, M. Chikawa, J. S. Song, C. S. Yoon, K. Kodama, N. Ushida, S. Aoki, T. Hara, T. Delbar, D. Favart, G. Gregoire, S. Kalinin, I. Makhlioueva, A. Artamonov, P. Gorbunov, V. Khovansky, V. Shamanov, I. Tsukerman, N. Bruski, D. Frekers, K. Hoshino, J. Kawada, M. Komatsu, M. Miyanishi, M. Nakamura, T. Nakano, K. Narita, K. Niu, K. Niwa, N. Nonaka, O. Sato, T. Toshito, S. Buontempo, A. G. Cocco, N. D'Ambrosio, G. De Lellis, G. De Rosa, F. Di Capua, G. Fiorillo, A. Marotta, M. Messina, P. Migliozzi, L. Scotto Lavina, P. Strolin, V. Tioukov, T. Okusawa, U. Dore, P. F. Loverre, L. Ludovici, G. Rosa, R. Santacesaria, A. Satta, F. R. Spada, E. Barbuto, C. Bozza, G. Grella, G. Romano, C. Sirignano, S. Sorrentino, Y. Sato, I. Tezuka

    The nuclear emulsion target of the CHORUS detector was exposed to the wide-band neutrino beam of the CERN SPS of 27 GeV average neutrino energy from 1994 to 1997. In total, about 100 000 charged-current (CC) neutrino interactions with at least one identified muon were located in the emulsion target and fully reconstructed, using newly developed automated scanning systems. Charmed particles were searched for by a program recognizing particle decays. The observation of the decay in nuclear emulsion makes it possible to select a sample with very low background and minimal kinematical bias. In all, 2013 CC interactions with a charmed hadron candidate in the final state were selected and confirmed through visual inspection. The charm production rate induced by neutrinos relative to the CC cross-section is measured to be sigma(nu(mu)N -> mu(-)CX)/sigma(CC) = (5.75 +/- 0.32(stat) +/- 0.30(syst))%. The charm production cross-section as a function of neutrino energy is also obtained. The results are in good agreement with previous measurements. The charm-quark hadronization produces the following charmed hadrons with relative fractions (in %): f(D)(0) = 43.7 +/- 4.5, f(Lambda c)(+) = 19.2 +/- 4.2, f(D)(+) = 25.3 +/- 4.2 and f(Ds)(+) = 11.8 +/- 4.7.

    IOP PUBLISHING LTD, 2011年09月, NEW JOURNAL OF PHYSICS, 13, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Abe, K., Abgrall, N., Ajima, Y., Aihara, H., Albert, J.B., Andreopoulos, C., Andrieu, B., Aoki, S., Araoka, O., Argyriades, J., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Badertscher, A., Barbi, M., Barker, G.J., Barr, G., Bass, M., Bay, F., Bentham, S., Berardi, V., Berger, B.E., Bertram, I., Besnier, M., Beucher, J., Beznosko, D., Bhadra, S., Blaszczyk, F.d.M., Blondel, A., Bojechko, C., Bouchez, J., Boyd, S.B., Bravar, A., Bronner, C., Brook-Roberge, D.G., Buchanan, N., Budd, H., Calvet, D., Cartwright, S.L., Carver, A., Castillo, R., Catanesi, M.G., Cazes, A., Cervera, A., Chavez, C., Choi, S., Christodoulou, G., Coleman, J., Coleman, W., Collazuol, G., Connolly, K., Curioni, A., Dabrowska, A., Danko, I., Das, R., Davies, G.S., Davis, S., Day, M., De Rosa, G., de Andre, J.P.A.M., de Perio, P., Delbart, A., Densham, C., Di Lodovico, F., Di Luise, S., Tran, P.Dinh, Dobson, J., Dore, U., Drapier, O., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Dziomba, M., Emery, S., Ereditato, A., Escudero, L., Esposito, L.S., Fechner, M., Ferrero, A., Finch, A.J., Frank, E., Fujii, Y., Fukuda, Y., Galymov, V., Gannaway, F.C., Gaudin, A., Gendotti, A., George, M.A., Giffin, S., Giganti, C., Gilje, K., Golan, T., Goldhaber, M., Gomez-Cadenas, J.J., Gonin, M., Grant, A., Grant, N., Gumplinger, P., Guzowski, P., Haesler, A., Haigh, M.D., Hamano, K., Hansen, C., Hansen, D., Hara, T., Harrison, P.F., Hartfiel, B., Hartz, M., Haruyama, T., Hasegawa, T., Hastings, N.C., Hastings, S., Hatzikoutelis, A., Hayashi, K., Hayato, Y., Hearty, C., Helmer, R.L., Henderson, R., Higashi, N., Hignight, J., Hirose, E., Holeczek, J., Horikawa, S., Hyndman, A., Ichikawa, A.K., Ieki, K., Ieva, M., Iida, M., Ikeda, M., Ilic, J., Imber, J., Ishida, T., Ishihara, C., Ishii, T., Ives, S.J., Iwasaki, M., Iyogi, K., Izmaylov, A., Jamieson, B., Johnson, R.A., Joo, K.K., Jover-Manas, G.V., Jung, C.K., Kaji, H., Kajita, T., Kakuno, H., Kameda, J., Kaneyuki, K., Karlen, D., Kasami, K., Kato, I., Kearns, E., Khabibullin, M., Khanam, F., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kim, J., Kim, J.Y., Kim, S.B., Kimura, N., Kirby, B., Kisiel, J., Kitching, P., Kobayashi, T., Kogan, G., Koike, S., Konaka, A., Kormos, L.L., Korzenev, A., Koseki, K., Koshio, Y., Kouzuma, Y., Kowalik, K., Kravtsov, V., Kreslo, I., Kropp, W., Kubo, H., Kudenko, Y., Kulkarni, N., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Laveder, M., Lee, K.P., Le, P.T., Levy, J.M., Licciardi, C., Lim, I.T., Lindner, T., Litchfield, R.P., Litos, M., Longhin, A., Lopez, G.D., Loverre, P.F., Ludovici, L., Lux, T., Macaire, M., Mahn, K., Makida, Y., Malek, M., Manly, S., Marchionni, A., Marino, A.D., Marteau, J., Martin, J.F., Maruyama, T., Maryon, T., Marzec, J., Masliah, P., Mathie, E.L., Matsumura, C., Matsuoka, K., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCauley, N., McFarland, K.S., McGrew, C., McLachlan, T., Messina, M., Metcalf, W., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C.A., Minamino, A., Mineev, O., Mine, S., Missert, A.D., Mituka, G., Miura, M., Mizouchi, K., Monfregola, L., Moreau, F., Morgan, B., Moriyama, S., Muir, A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nakadaira, T., Nakahata, M., Nakai, T., Nakajima, K., Nakamoto, T., Nakamura, K., Nakayama, S., Nakaya, T., Naples, D., Navin, M.L., Nelson, B., Nicholls, T.C., Nishikawa, K., Nishino, H., Nowak, J.A., Noy, M., Obayashi, Y., Ogitsu, T., Ohhata, H., Okamura, T., Okumura, K., Okusawa, T., Oser, S.M., Otani, M., Owen, R.A., Oyama, Y., Ozaki, T., Pac, M.Y., Palladino, V., Paolone, V., Paul, P., Payne, D., Pearce, G.F., Perkin, J.D., Pettinacci, V., Pierre, F., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J.M., Poutissou, R., Przewlocki, P., Qian, W., Raaf, J.L., Radicioni, E., Ratoff, P.N., Raufer, T.M., Ravonel, M., Raymond, M., Retiere, F., Robert, A., Rodrigues, P.A., Rondio, E., Roney, J.M., Rossi, B., Roth, S., Rubbia, A., Ruterbories, D., Sabouri, S., Sacco, R., Sakashita, K., Sanchez, F., Sarrat, A., Sasaki, K., Scholberg, K., Schwehr, J., Scott, M., Scully, D.I., Seiya, Y., Sekiguchi, T., Sekiya, H., Shibata, M., Shimizu, Y., Shiozawa, M., Short, S., Siyad, M., Smith, R.J., Smy, M., Sobczyk, J.T., Sobel, H., Sorel, M., Stahl, A., Stamoulis, P., Steinmann, J., Still, B., Stone, J., Strabel, C., Sulak, L.R., Sulej, R., Sutcliffe, P., Suzuki, A., Suzuki, K., Suzuki, S., Suzuki, S.Y., Suzuki, Y., Suzuki, Y., Szeglowski, T., Szeptycka, M., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takenaga, Y., Takeuchi, Y., Tanaka, K., Tanaka, H.A., Tanaka, M., Tanaka, M.M., Tanimoto, N., Tashiro, K., Taylor, I., Terashima, A., Terhorst, D., Terri, R., Thompson, L.F., Thorley, A., Toki, W., Tomaru, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Ueno, K., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Walding, J.J., Waldron, A.V., Walter, C.W., Wanderer, P.J., Wang, J., Ward, M.A., Ward, G.P., Wark, D., Wascko, M.O., Weber, A., Wendell, R., West, N., Whitehead, L.H., Wikstrom, G., Wilkes, R.J., Wilking, M.J., Wilson, J.R., Wilson, R.J., Wongjirad, T., Yamada, S., Yamada, Y., Yamamoto, A., Yamamoto, K., Yamanoi, Y., Yamaoka, H., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E.D., Zito, M., Zmuda, J.

    2011年07月18日, Phys.Rev.Lett., 107, 041801 - 041801, 英語

    [査読有り]

    研究論文(学術雑誌)

  • N. Agafonova, A. Aleksandrov, O. Altinok, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, D. Autiero, A. Badertscher, A. Bagulya, A. Bendhahbi, A. Bertolin, C. Bozza, T. Brugiere, R. Brugnera, F. Brunet, G. Brunetti, S. Buontempo, A. Cazes, L. Chaussard, M. Chernyavskiy, V. Chiarella, A. Chukanov, N. D'Ambrosio, F. Dal Corso, G. De Lellis, P. del Amo Sanchez, Y. Declais, M. De Serio, F. Di Capua, A. Di Crescenzo, D. Di Ferdinando, N. Di Marco, S. Dmitrievski, M. Dracos, D. Duchesneau, S. Dusini, T. Dzhatdoev, J. Ebert, O. Egorov, R. Enikeev, A. Ereditato, L. S. Esposito, J. Favier, T. Ferber, R. A. Fini, D. Frekers, T. Fukuda, A. Garfagnini, G. Giacomelli, M. Giorgini, C. Gollnitz, J. Goldberg, D. Golubkov, L. Goncharova, Y. Gornushkin, G. Grella, F. Grianti, A. M. Guler, C. Gustavino, C. Hagner, K. Hamada, T. Hara, M. Hierholzer, A. Hollnagel, K. Hoshino, M. Ieva, H. Ishida, K. Jakovcic, C. Jollet, F. Juget, M. Kamiscioglu, K. Kazuyama, S. H. Kim, M. Kimura, N. Kitagawa, B. Klicek, J. Knuesel, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, H. Kubota, C. Lazzaro, J. Lenkeit, I. Lippi, A. Ljubicic, A. Longhin, P. Loverre, G. Lutter, A. Malgin, G. Mandrioli, K. Mannai, J. Marteau, T. Matsuo, V. Matveev, N. Mauri, E. Medinaceli, F. Meisel, A. Meregaglia, P. Migliozzi, S. Mikado, S. Miyamoto, P. Monacelli, K. Morishima, U. Moser, M. T. Muciaccia, N. Naganawa, T. Naka, M. Nakamura, T. Nakano, D. Naumov, V. Nikitina, K. Niwa, Y. Nonoyama, S. Ogawa, N. Okateva, A. Olchevskiy, M. Paniccia, A. Paoloni, B. D. Park, I. G. Park, A. Pastore, L. Patrizii, E. Pennacchio, H. Pessard, K. Pretzl, V. Pilipenko, C. Pistillo, N. Polukhina, M. Pozzato, F. Pupilli, R. Rescigno, T. Roganova, H. Rokujo, G. Romano, G. Rosa, I. Rostovtseva, A. Rubbia, A. Russo, V. Ryasny, O. Ryazhskaya, O. Sato, Y. Sato, A. Schembri, W. Schmidt-Parzefall, H. Schroeder, L. Scotto Lavina, A. Sheshukov, H. Shibuya, G. Shoziyeov, S. Simone, M. Sioli, C. Sirignano, G. Sirri, J. S. Song, M. Spinetti, L. Stanco, N. Starkov, M. Stipcevic, T. Strauss, P. Strolin, S. Takahashi, M. Tenti, F. Terranova, I. Tezuka, V. Tioukov, P. Tolun, A. Trabelsi, T. Tran, S. Tufanli, P. Vilain, M. Vladimirov, L. Votano, J. L. Vuilleumier, G. Wilquet, B. Wonsak, V. Yakushev, C. S. Yoon, T. Yoshioka, J. Yoshida, Y. Zaitsev, S. Zemskova, A. Zghiche, R. Zimmermann

    The OPERA experiment is based on a hybrid technology combining electronic detectors (EDs) and nuclear emulsions. OPERA collected muon-neutrino interactions during the 2008 and 2009 physics runs of the CNGS neutrino beam, produced at CERN with an energy range of about 5-35 GeV. A total of 5.3x10(19) protons on target equivalent luminosity have been analysed with the OPERA EDs: scintillator strips target trackers and magnetic muon spectrometers equipped with resistive plate gas chambers and drift tubes, allowing a detailed reconstruction of muon-neutrino interactions. Charged current (CC) and neutral current (NC) interactions are identified, using the measurements in the EDs, and the NC/CC ratio is computed. The momentum distribution and the charge of the muon tracks produced in CC interactions are analysed. Calorimetric measurements of the visible energy are performed for both the CC and NC samples. For CC events, the Bjorken-y distribution and the hadronic shower profile are computed. The results are compared with a detailed Monte Carlo simulation of the response of EDs.

    IOP PUBLISHING LTD, 2011年05月, NEW JOURNAL OF PHYSICS, 13, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Mariani C, Aoki S, Hara T, Suzuki A, Takeuchi Y

    2011年03月16日, Phys. Rev. D, 83, 054023 - 054023, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Atsumu Suzuki, Shigeki Aoki, Junji Haba, Makoto Sakuda, Motohiro Suyama

    A novel large aperture electron bombardment charge coupled device (EBCCD) has been developed. The diameter of its photocathode is 10 cm and it is the first EBCCD with such a large aperture. Its gain shows good linearity as a function of applied voltage up to -12 kV, where the gain is 2400. The spatial resolution was measured using ladder pattern charts. It is better than 2 line pairs/mm, which corresponds to 3.5 times the CCD pixel size. The spatial resolution was also measured with a copper foil pattern on a fluorescent screen irradiated with X-rays (14 and 18 keV) and a 60 keV gamma-ray from an americium source. The result was consistent with the measurement using ladder pattern charts. The output signal as a function of input light intensity shows better linearity than that of image intensifier tubes (IIT) as expected. We could detect cosmic rays passing through a scintillating fiber block and a plastic scintillator as a demonstration for a practical use in particle physics experiments. This kind of large aperture EBCCD can, for example, be used as an image sensor for a detector with a large number of readout channels and is expected to be additionally applied to other physics experiments. © 2010 Elsevier B.V. All rights reserved.

    2011年02月02日, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 628 (1), 260 - 263, 英語

    [査読有り]

    研究論文(国際会議プロシーディングス)

  • S. Aoki, A. Ariga, L. Arrabito, D. Autiero, M. Besnier, C. Bozza, S. Buontempo, E. Carrara, L. Consiglio, M. Cozzi, N. D'Ambrosio, G. De Lellis, Y. Declais, M. De Serio, F. Di Capua, A. Di Crescenzo, D. Di Ferdinando, N. Di Marco, D. Duchesneau, A. Ereditato, L. S. Esposito, T. Fukuda, G. Giacomelli, M. Giorgini, G. Grella, K. Hamada, M. Ieva, F. Juget, N. Kitagawa, J. Knuesel, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, I. Laktineh, A. Longhin, B. Lundberg, G. Lutter, G. Mandrioli, A. Marotta, F. Meisel, P. Migliozzi, K. Morishima, M. T. Muciaccia, N. Naganawa, M. Nakamura, T. Nakano, K. Niwa, Y. Nonoyama, V. Paolone, A. Pastore, L. Patrizii, C. Pistillo, M. Pozzato, F. Pupilli, R. Rameika, R. Rescigno, G. Rosa, A. Russo, O. Sato, L. Scotto Lavina, S. Simone, M. Sioli, C. Sirignano, G. Sirri, P. Strolin, M. Tenti, V. Tioukov, J. Yoshida, T. Yoshioka

    The PEANUT experiment was designed to study the NuMi neutrino beam at Fermilab. The detector uses a hybrid technique, being made of nuclear emulsions and scintillator trackers. Emulsion films act as a micrometric tracking device and are interleaved with lead plates used as passive material. The detector is designed to precisely reconstruct the topology of neutrino interactions and hence to measure the different contributions to the cross section. We present here the full reconstruction and analysis of 147 neutrino interactions and the measurement of the quasi-elastic, resonance and deep-inelastic contributions to the total charged current cross section at the energies of the NuMi neutrino beam. This technique could be applied for beam monitoring in future neutrino facilities, and this paper shows its proof-of-principle.

    IOP PUBLISHING LTD, 2010年11月, NEW JOURNAL OF PHYSICS, 12, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Satoru Takahashi, Shigeki Aoki, Hiroki Rokujo, Kaname Hamada, Masahiro Komatsu, Kunihiro Morishima, Mitsuhiro Nakamura, Toshiyuki Nakano, Kimio Niwa, Osamu Sato, Teppei Yoshioka, Koichi Kodama

    Nuclear emulsion has a potential use as a gamma-ray telescope with high angular resolution. For this application it is necessary to know the time when each track was recorded in the emulsion. In previous experiments using nuclear emulsion, various efforts were used to associate time to nuclear emulsion tracks and to improve the time resolution. Using a high speed readout system for nuclear emulsion together with a clock-based multi-stage emulsion shifter, we invented a technique to give a time-stamp to emulsion tracks and greatly improve the time resolution. A test experiment with a 2-stage shifter was used to demonstrate the principle of multi-stage shifting, and we achieved a time resolution 1.5 s for 12.1 h (about 1 part in 29 000) with the time stamp reliability 97% and the time stamp efficiency 98%. This multi-stage shifter can achieve the time resolution required for a gamma-ray telescope and can also be applied to another cosmic ray observations and accelerator experiments using nuclear emulsion. (C) 2010 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2010年08月, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 620 (2-3), 192 - 195, 英語

    [査読有り]

    研究論文(学術雑誌)

  • THE SMRD SUBDETECTOR AT THE T2K NEAR DETECTOR STATION

    M. Ziembicki, R. Sulej, S. Aoki, J. Blocki, J. Brinson, A. Dabrowska, I. Danko, M. Dziewiecki, B. Ellison, T. Golan, L. Golyshkin, R. Gould, T. Hara, B. Hartfiel, J. Holeczek, A. Izmaylov, M. Khabibullin, A. Khotjantsev, D. Kielczewska, J. Kisiel, T. Kozlowski, Y. Kudenko, N. Kulkarni, R. Kurjata, T. Kutter, J. Lagoda, J. Liu, J. Marzec, W. Metcalf, P. Mijakowski, O. Mineev, D. Naples, M. Nauman, D. Northacker, J. Nowak, V. Paolone, M. Posiadala, P. Przewlocki, J. Reid, E. Rondio, E. Shabalin, D. Smith, J. Sobczyk, M. Stodulski, A. Straczek, A. T. Suzuki, J. Swierblewski, T. Szeglowski, M. Szeptycka, T. Wachala, D. Warner, T. Yano, N. Yershov, A. Zalewska, K. Zaremba, J. Zmuda

    The T2K long-baseline neutrino oscillation experiment is running in Japan. The primary goals of the T2K are measurement of the mixing angle theta(13), and precise measurements of the mixing angle theta(23) and of the mass difference Delta m(23)(2). The installation of the near detector complex was completed and first data were already registered. This article presents operation of the Side Muon Range Detector, a component of the Off-Axis near detector. Detector concept and implementation are presented, followed by a description of cosmic muon track reconstruction algorithm and finally current status.

    POLISH ACAD SCIENCES INST PHYSICS, 2010年07月, ACTA PHYSICA POLONICA B, 41 (7), 1579 - 1584, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Agafonova N, Anokhina A, Aoki S, Hara T, Rokujo H

    The OPERA neutrino detector in the underground Gran Sasso Laboratory (LNGS) has been designed to perform the first detection of neutrino oscillations in direct appearance mode through the study of the v(mu) -> v(tau) channel. The hybrid apparatus consists of an emulsion/lead target complemented by electronic detectors and it is placed in the high energy long-baseline CERN to LNGS beam (CNGS) 730 km away from the neutrino source. Runs with CNGS neutrinos were successfully carried out in 2008 and 2009. After a brief description of the beam, the experimental setup and the procedures used for the analysis of the neutrino events, we describe the topology and kinematics of a first candidate v(tau) charged-current event satisfying the kinematical selection criteria. The background calculations and their cross-check are explained in detail and the significance of the event is assessed. (C) 2010 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2010年07月, Phys. Lett. B, 691 (3), 138 - 145, 英語

    [査読有り]

    研究論文(学術雑誌)

  • N. Agafonova, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, D. Autiero, A. Badertscher, A. Bagulya, A. Bertolin, M. Besnier, D. Bick, V. Boyarkin, C. Bozza, T. Brugiere, R. Brugnera, G. Brunetti, S. Buontempo, A. Cazes, L. Chaussard, M. Chernyavsky, V. Chiarella, N. Chon-Sen, A. Chukanov, M. Cozzi, G. D'Amato, F. Dal Corso, N. D'Ambrosio, G. De Lellis, Y. Declais, M. De Serio, F. Di Capua, D. Di Ferdinando, A. Di Giovanni, N. Di Marco, S. Dmitrievski, M. Dracos, D. Duchesneau, S. Dusini, J. Ebert, O. Egorov, R. Enikeev, A. Ereditato, L. S. Esposito, J. Favier, G. Felici, T. Ferber, R. Fini, D. Frekers, T. Fukuda, C. Fukushima, V. I. Galkin, A. Garfagnini, G. Giacomelli, M. Giorgini, C. Goellnitz, J. Goldberg, D. Golubkov, L. Goncharova, Y. Gornushkin, G. Grella, F. Grianti, M. Guler, C. Gustavino, C. Hagner, K. Hamada, T. Hara, M. Hierholzer, K. Hoshino, M. Ieva, K. Jakovcic, C. Jollet, F. Juget, M. Kazuyama, S. H. Kim, M. Kimura, B. Klicek, J. Knuesel, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, H. Kubota, C. Lazzaro, J. Lenkeit, A. Ljubicic, A. Longhin, G. Lutter, A. Malgin, G. Mandrioli, A. Marotta, J. Marteau, T. Matsuo, V. Matveev, N. Mauri, E. Medinaceli, F. Meisel, A. Meregaglia, P. Migliozzi, S. Mikado, S. Miyamoto, P. Monacelli, K. Morishima, U. Moser, M. T. Muciaccia, N. Naganawa, T. Naka, M. Nakamura, T. Nakano, D. Naumov, V. Nikitina, K. Niwa, Y. Nonoyama, S. Ogawa, A. Olchevski, C. Oldorf, G. Orlova, V. Osedlo, M. Paniccia, A. Paoloni, B. D. Park, I. G. Park, A. Pastore, L. Patrizii, E. Pennacchio, H. Pessard, V. Pilipenko, C. Pistillo, G. Policastro, N. Polukhina, M. Pozzato, K. Pretzl, P. Publichenko, F. Pupilli, R. Rescigno, T. Roganova, H. Rokujo, G. Romano, G. Rosa, I. Rostovtseva, A. Rubbia, A. Russo, V. Ryasny, O. Ryazhskaya, O. Sato, Y. Sato, A. Schembri, W. Schmidt Parzefall, H. Schroeder, L. Scotto Lavina, A. Sheshukov, H. Shibuya, S. Simone, M. Sioli, C. Sirignano, G. Sirri, J. S. Song, M. Spinetti, L. Stanco, N. Starkov, M. Stipcevic, T. Strauss, P. Strolin, S. Takahashi, M. Tenti, F. Terranova, I. Tezuka, V. Tioukov, P. Tolun, T. Tran, S. Tufanli, P. Vilain, M. Vladimirov, L. Votano, J. L. Vuilleumier, G. Wilquet, B. Wonsak, V. Yakushev, C. S. Yoon, T. Yoshioka, J. Yoshida, Y. Zaitsev, S. Zemskova, A. Zghiche, R. Zimmermann

    The OPERA detector at the Gran Sasso underground laboratory (LNGS) was used to measure the atmospheric muon charge ratio R(mu) = N(mu)+/N(mu)- in the TeV energy region. We analyzed 403069 atmospheric muons corresponding to 113.4 days of livetime during the 2008 CNGS run. We computed separately the muon charge ratio for single and for multiple muon events in order to select different energy regions of the primary cosmic ray spectrum and to test the R(mu) dependence on the primary composition. The measured R(mu) values were corrected taking into account the charge-misidentification errors. Data have also been grouped in five bins of the "vertical surface energy" epsilon(mu) cos theta. A fit to a simplified model of muon production in the atmosphere allowed the determination of the pion and kaon charge ratios weighted by the cosmic ray energy spectrum.

    SPRINGER, 2010年05月, EUROPEAN PHYSICAL JOURNAL C, 67 (1-2), 25 - 37, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Aoki S, Hara T

    An emulsion-counter hybrid experiment (KEK E176) was carried out to search for double strangeness systems such as double-Lambda hypernuclei and H-dibaryons. More than 10% of Xi(-) hyperons produced in the (K-, K+) reaction were brought to rest in the nuclear emulsion. We have obtained 98 candidate events of nuclear capture at rest of Xi(-) hyperons which are described in this report. Among those, four events were identified as sequential weak decay of double-Lambda hypernuclei. The binding energies of Xi(-)-(C-12, N-14 and O-16) states have been estimated for two events which emit twin single-Lambda hypernuclei back to back from the capture point. The Sigma(-)p decay vertex of an H-dibaryon was searched for near the capture point and no evidence was observed. Upper limits for the branching ratio of H emission are 5-10% for a lifetime less than 0.1 ns at the 90% confidence level. The trapping probabilities of single and double strangeness to a nuclear fragment following Xi(-) capture at rest have been studied. (C) 2009 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2009年09月, Nucl. Phys. A, 828 (3-4), 191 - 232, 英語

    [査読有り]

    研究論文(学術雑誌)

  • N. Agafonova, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, L. Arrabito, D. Autiero, A. Badertscher, A. Bagulya, F. Bersani Greggio, A. Bertolin, M. Besnier, D. Bick, V. Boyarkin, C. Bozza, T. Brugiere, R. Brugnera, G. Brunetti, S. Buontempo, E. Carrara, A. Cazes, L. Chaussard, M. Chernyavsky, V. Chiarella, N. Chon-Sen, A. Chukanov, M. Cozzi, G. D'Amato, F. Dal Corso, N. D'Ambrosio, G. De Lellis, Y. Declais, M. De Serio, F. Di Capua, D. Di Ferdinando, A. Di Giovanni, N. Di Marco, C. Di Troia, S. Dmitrievski, A. Dominjon, M. Dracos, D. Duchesneau, S. Dusini, J. Ebert, O. Egorov, R. Enikeev, A. Ereditato, L. S. Esposito, J. Favier, G. Felici, T. Ferber, R. Fini, D. Frekers, T. Fukuda, C. Fukushima, V. I. Galkin, V. A. Galkin, A. Garfagnini, G. Giacomelli, M. Giorgini, C. Goellnitz, T. Goeltzenlichter, J. Goldberg, D. Golubkov, Y. Gornushkin, G. Grella, F. Grianti, M. Guler, C. Gustavino, C. Hagner, K. Hamada, T. Hara, M. Hierholzer, K. Hoshino, M. Ieva, K. Jakovcic, B. Janutta, C. Jollet, F. Juget, M. Kazuyama, S. H. Kim, M. Kimura, N. Kitagawa, B. Klicek, J. Knuesel, K. Kodama, D. Kolev, M. Komatsu, U. Kose, A. Krasnoperov, I. Kreslo, Z. Krumstein, H. Kubota, V. V. Kutsenov, V. A. Kuznetsov, I. Laktineh, C. Lazzaro, J. Lenkeit, A. Ljubicic, A. Longhin, G. Lutter, A. Malgin, K. Manai, G. Mandrioli, A. Marotta, J. Marteau, T. Matsuo, V. Matveev, N. Mauri, E. Medinaceli, F. Meisel, A. Meregaglia, M. Messina, P. Migliozzi, S. Miyamoto, P. Monacelli, K. Morishima, U. Moser, M. T. Muciaccia, N. Naganawa, T. Naka, M. Nakamura, T. Nakano, V. Nikitina, K. Niwa, Y. Nonoyama, A. Nozdrin, S. Ogawa, A. Olchevski, G. Orlova, V. Osedlo, D. Ossetski, M. Paniccia, A. Paoloni, B. D. Park, I. G. Park, A. Pastore, L. Patrizii, E. Pennacchio, H. Pessard, V. Pilipenko, C. Pistillo, N. Polukhina, M. Pozzato, K. Pretzl, P. Publichenko, F. Pupilli, R. Rescigno, D. Rizhikov, T. Roganova, G. Romano, G. Rosa, I. Rostovtseva, A. Rubbia, A. Russo, V. Ryasny, O. Ryazhskaya, A. Sadovski, O. Sato, Y. Sato, V. Saveliev, A. Schembri, W. Schmidt Parzefall, H. Schroeder, H. U. Schuetz, J. Schuler, L. Scotto Lavina, H. Shibuya, S. Simone, M. Sioli, C. Sirignano, G. Sirri, J. S. Song, M. Spinetti, L. Stanco, N. Starkov, M. Stipcevic, T. Strauss, P. Strolin, V. Sugonyaev, S. Takahashi, V. Tereschenko, F. Terranova, I. Tezuka, V. Tioukov, P. Tolun, V. Tsarev, R. Tsenov, S. Tufanli, N. Ushida, V. Verguilov, P. Vilain, M. Vladimirov, L. Votano, J. L. Vuilleumier, G. Wilquet, B. Wonsak, V. Yakushev, C. S. Yoon, T. Yoshioka, J. Yoshida, Y. Zaitsev, A. Zghiche, R. Zimmermann

    The OPERA neutrino detector in the underground Gran Sasso Laboratory (LNGS) was designed to perform the first detection of neutrino oscillations in appearance mode through the study of nu(mu) -> nu(tau) oscillations. The apparatus consists of an emulsion/lead target complemented by electronic detectors and it is placed in the high energy long-baseline CERN to LNGS beam (CNGS) 730 km away from the neutrino source. Runs with CNGS neutrinos were successfully carried out in 2007 and 2008 with the detector fully operational with its related facilities for the emulsion handling and analysis. After a brief description of the beam and of the experimental setup we report on the collection, reconstruction and analysis procedures of first samples of neutrino interaction events.

    IOP PUBLISHING LTD, 2009年06月, JOURNAL OF INSTRUMENTATION, 4, 英語

    [査読有り]

    研究論文(学術雑誌)

  • R. Acquafredda, T. Adam, N. Agafonova, P. Alvarez Sanchez, M. Ambrosio, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, L. Arrabito, C. Aufranc, D. Autiero, A. Badertscher, A. Bagulya, E. Baussan, A. Bergnoli, F. Bersani Greggio, A. Bertolin, M. Besnier, D. Biare, D. Bick, S. Blin, K. Borer, J. Boucrot, D. Boutigny, V. Boyarkin, C. Bozza, T. Brugiere, R. Brugnera, G. Brunetti, S. Buontempo, J. E. Campagne, B. Carlus, E. Carrara, A. Cazes, L. Chaussard, M. Chernyavsky, V. Chiarella, N. Chon-Sen, A. Chukanov, R. Ciesielski, L. Consiglio, M. Cozzi, G. D'Amato, F. Dal Corso, N. D'Ambrosio, J. Damet, C. de La Taille, G. De Lellis, Y. Declais, T. Descombes, M. De Serio, F. Di Capua, D. Di Ferdinando, A. Di Giovanni, N. Di Marco, C. Di Troia, N. Dick, S. Dmitrievski, A. Dominjon, M. Dracos, D. Duchesneau, B. Dulach, S. Dusini, J. Ebert, I. Efthymiopoulos, O. Egorov, K. Elsener, R. Enikeev, A. Ereditato, L. S. Esposito, C. Fanin, J. Favier, G. Felici, T. Ferber, R. Fini, L. Fournier, A. Franceschi, D. Frekers, T. Fukuda, C. Fukushima, V. I. Galkin, V. A. Galkin, R. Gallet, S. Gardien, A. Garfagnini, G. Gaudiot, G. Giacomelli, M. Giorgini, C. Girerd, C. Goellnitz, T. Goeltzenlichter, J. Goldberg, D. Golubkov, Y. Gornushkin, J-N. Grapton, G. Grella, F. Grianti, E. Gschwendtner, C. Guerin, M. Guler, C. Gustavino, J-L. Guyonnet, C. Hagner, T. Hamane, T. Hara, M. Hauger, M. Hess, M. Hierholzer, K. Hoshino, M. Ieva, M. Incurvati, K. Jakovcic, J. Janicsko Csathy, B. Janutta, C. Jollet, F. Juget, M. Kazuyama, S. H. Kim, N. Khovansky, M. Kimura, B. Klicek, J. Knuesel, K. Kodama, D. Kolev, M. Komatsu, U. Kose, A. Krasnoperov, I. Kreslo, Z. Krumstein, V. V. Kutsenov, V. A. Kuznetsov, I. Laktineh, M. Lavy, C. Lazzaro, T. D. Le, T. Le Flour, J. Lenkeit, J. Lewis, S. Lieunard, A. Ljubicic, A. Longhin, G. Lutter, A. Malgin, K. Manai, G. Mandrioli, A. Marotta, J. Marteau, G. Martin-Chassard, V. Matveev, N. Mauri, M. Meddahi, F. Meisel, A. Meregaglia, A. Meschini, M. Messina, P. Migliozzi, P. Monacelli, I. Monteiro, F. Moreau, K. Morishima, U. Moser, M. T. Muciaccia, P. Mugnier, N. Naganawa, M. Nakamura, T. Nakano, T. Napolitano, V. Nikitina, K. Niwa, Y. Nonoyama, A. Nozdrin, S. Ogawa, A. Olchevski, D. Orlandi, G. Orlova, V. Osedlo, D. Ossetski, M. Paniccia, A. Paoloni, B. D. Park, I. G. Park, A. Pastore, L. Patrizii, L. Pellegrino, E. Pennacchio, H. Pessard, V. Pilipenko, C. Pistillo, N. Polukhina, M. Pozzato, K. Pretzl, P. Publichenko, F. Pupilli, L. Raux, J. P. Repellin, R. Rescigno, D. Rizhikov, T. Roganova, G. Romano, G. Rosa, I. Rostovtseva, A. Rubbia, A. Russo, V. Ryasny, O. Ryazhskaya, A. Sadovski, C. Sanelli, O. Sato, Y. Sato, V. Saveliev, G. Sazhina, A. Schembri, W. Schmidt Parzefall, H. Schroeder, H. U. Schuetz, J. Schuler, L. Scotto Lavina, J. Serrano, H. Shibuya, S. Simone, M. Sioli, C. Sirignano, G. Sirri, J. S. Song, M. Spinetti, L. Stanco, N. Starkov, M. Stipcevic, T. Strauss, P. Strolin, V. Sugonyaev, S. Takahashi, V. Talochkin, M. Tenti, V. Tereschenko, F. Terranova, I. Tezuka, V. Tioukov, P. Tolun, V. Tsarev, R. Tsenov, S. Tufanli, U. Ugolino, N. Ushida, G. Van Beek, V. Verguilov, T. Viant, P. Vilain, M. Vladimirov, L. Votano, J. L. Vuilleumier, T. Waelchli, M. Weber, G. Wilquet, B. Wonsak, J. Wurtz, V. Yakushev, C. S. Yoon, Y. Zaitsev, A. Zghiche, R. Zimmermann

    The OPERA neutrino oscillation experiment has been designed to prove the appearance of nu(tau) in a nearly pure nu(mu) beam (CNGS) produced at CERN and detected in the underground Hall C of the Gran Sasso Laboratory, 730 km away from the source. In OPERA, tau leptons resulting from the interaction of nu(tau) are produced in target units called bricks made of nuclear emulsion films interleaved with lead plates. The OPERA target contains 150000 of such bricks, for a total mass of 1.25 kton, arranged into walls interleaved with plastic scintillator strips. The detector is split into two identical supermodules, each supermodule containing a target section followed by a magnetic spectrometer for momentum and charge measurement of penetrating particles. Real time information from the scintillators and the spectrometers provide the identification of the bricks where the neutrino interactions occurred. The candidate bricks are extracted from the walls and, after X-ray marking and an exposure to cosmic rays for alignment, their emulsion films are developed and sent to the emulsion scanning laboratories to perform the accurate scan of the event. In this paper, we review the design and construction of the detector and of its related infrastructures, and report on some technical performances of the various components. The construction of the detector started in 2003 and it was completed in Summer 2008. The experiment is presently in the data taking phase. The whole sequence of operations has proven to be successful, from triggering to brick selection, development, scanning and event analysis.

    IOP PUBLISHING LTD, 2009年04月, JOURNAL OF INSTRUMENTATION, 4, 英語

    [査読有り]

    研究論文(学術雑誌)

  • S. Aoki, K. Kodam, J. Kawada, N. Nonaka, A. Suzuki, T. Hara, Y. Watanabe, H. Rokujyo, A. Ariga, M. Kazuyama, H. Kubota, M. Komatsu, T. Sako, O. Sato, Y. Taira, S. Takahashi, N. Naganawa, T. Nakano, M. Nakamura, K. Niwa, Y. Nonoyama, K. Hamada, T. Fukuda, T. Furukawa, K. Hoshino, M. Miyanishi, S. Miyamoto, K. Morishima, T. Yoshioka, J. Yoshida, A. Iyono, Y. Sato, I. Tezuka

    A new gamma ray observation project with balloon borne emulsion chambers is presented. A new technique based on the accelerator emulsion experiments was implemented for studying high energy stellar objects with cosmic gamma rays. This paper provides the aim and concept of this project as well as some results of test experiments. © 2009 Elsevier B.V. All rights reserved.

    Elsevier, 2009年, Nuclear Physics B - Proceedings Supplements, 196 (C), 50 - 53, 英語

    [査読有り]

    研究論文(国際会議プロシーディングス)

  • Amako, K., Aoki, S., Asai, M., Ban, T., Fukuda, T., Fukushima, C., Kameoka, S., Kanazawa, M., Kanematsu, N., Kodama, K., Koi, T., Komori, M., Kubota, H., Murakami, K., Naganawa, N., Nakamura, T., Nakano, T., Natsume, M., Niwa, K., Ogawa, S., Ozaki, M., Sasaki, T., Sato, S., Shibasaki, M., Shibuya, H., Sihver, L., Takahashi, S., Toshito, T., Yoshida, H., Yoshida, J., Yusa, K.

    2008年12月12日, Physical Review C - Nuclear Physics, 78 (6), 英語

    [査読有り]

    研究論文(学術雑誌)

  • K. Kodama, N. Ushida, C. Andreopoulos, N. Saoulidou, G. Tzanakos, P. Yager, B. Baller, D. Boehnlein, W. Freeman, B. Lundberg, J. Morfin, R. Rameika, S. H. Chung, J. S. Song, C. S. Yoon, P. Berghaus, M. Kubantsev, N. W. Reay, R. Sidwell, N. Stanton, S. Yoshida, S. Aoki, T. Hara, J. T. Rhee, D. Ciampa, C. Erickson, M. Graham, E. Maher, K. Heller, R. Rusack, R. Schwienhorst, J. Sielaff, J. Trammell, J. Wilcox, T. Furukawa, K. Hoshino, H. Jiko, M. Komatsu, M. Nakamura, T. Nakano, K. Niwa, N. Nonaka, K. Okada, B. D. Park, O. Sato, S. Takahashi, V. Paolone, C. Rosenfeld, A. Kulik, T. Kafka, W. Oliver, T. Patzak, J. Schneps

    The DONuT experiment collected data in 1997 and published first results in 2000 based on four observed v(tau) charged-current (CC) interactions. The final analysis of the data collected in the experiment is presented in this paper, based on 3.6 x 10(17) protons on target using the 800 GeV Tevatron beam at Fermilab. The number of observed v(tau) CC events is 9 with an estimated background of 1.5 events, from a total of 578 observed neutrino interactions. We calculate the v(tau) CC cross section as a function of one parameter. Assuming D(s) mesons are the sole source for v(tau), the energy-independent part of the total CC cross section can be parametrized as sigma(const)(v(tau)) = 2.51n(1.52) x 10(-40) cm(2) GeV(-1) for n >= 4, where n is the parameter controlling the longitudinal part of the Ds differential cross section of the form d sigma/dx(F) proportional to (1-vertical bar x(F)vertical bar)(n). The analysis could not distinguish between v(tau) and (v) over bar (tau). The value of n obtained from PYTHIA simulations, n = 6.1, gives an estimated value of sigma(const)(v(tau))= (0.39 +/- 0.13 +/- 0.13) x 10(-38) cm(2) GeV(-1).

    AMER PHYSICAL SOC, 2008年09月, PHYSICAL REVIEW D, 78 (5), 英語

    [査読有り]

    研究論文(学術雑誌)

  • Rodriguez, A., Whitehead, L., Alcaraz, J.L., Andringa, S., Aoki, S., Argyriades, J., Asakura, K., Ashie, R., Berghaus, F., Berns, H., Bhang, H., Blondel, A., Borghi, S., Bouchez, J., Burguet-Castell, J., Casper, D., Catala, J., Cavata, C., Cervera, A., Chen, S.M., Cho, K.O., Choi, J.H., Dore, U., Espinal, X., Fechner, M., Fernandez, E., Fujii, Y., Fukuda, Y., Gomez-Cadenas, J., Gran, R., Hara, T., Hasegawa, M., Hasegawa, T., Hayato, Y., Helmer, R.L., Hiraide, K., Hosaka, J., Ichikawa, A.K., Iinuma, M., Ikeda, A., Ishida, T., Ishihara, K., Ishii, T., Ishitsuka, M., Itow, Y., Iwashita, T., Jang, H.I., Jeon, E.J., Jeong, I.S., Joo, K.K., Jover Manas, Gabriel V., Jung, C.K., Kajita, T., Kameda, J., Kaneyuki, K., Kato, I., Kearns, E., Kim, C.O., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kim, J.Y., Kim, S.B., Kitching, P., Kobayashi, K., Kobayashi, T., Konaka, A., Koshio, Y., Kropp, W., Kudenko, Yu., Kuno, Y., Kurimoto, Y., Kutter, T., Learned, J., Likhoded, S., Lim, I.T., Loverre, P.F., Ludovici, L., Maesaka, H., Mallet, J., Mariani, C., Matsuno, S., Matveev, V., McConnel, K., McGrew, C., Mikheyev, S., Minamino, A., Mine, S., Mineev, O., Mitsuda, C., Miura, M., Moriguchi, Y., Moriyama, S., Nakadaira, T., Nakahata, M., Nakamura, K., Nakano, I., Nakaya, T., Nakayama, S., Namba, T., Nambu, R., Nawang, S., Nishikawa, K., Nitta, K., Nova, F., Novella, P., Obayashi, Y., Okada, A., Okumura, K., Oser, S.M., Oyama, Y., Pac, M.Y., Pierre, F., Saji, C., Sakuda, M., Sanchez, F., Scholberg, K., Schroeter, R., Sekiguchi, M., Shiozawa, M., Shiraishi, K., Sitjes, G., Smy, M., Sobel, H., Sorel, M., Stone, J., Sulak, L., Suzuki, A., Suzuki, Y., Tada, M., Takahashi, T., Takenaga, Y., Takeuchi, Y., Taki, K., Takubo, Y., Tamura, N., Tanaka, M., Terri, R., T'Jampens, S., Tornero-Lopez, A., Totsuka, Y., Vagins, M., Walter, C.W., Wang, W., Wilkes, R.J., Yamada, S., Yamada, Y., Yamamoto, S., Yanagisawa, C., Yershov, N., Yokoyama, H., Yokoyama, M., Yoo, J., Yoshida, M., Zalipska, J.

    2008年08月07日, Phys.Rev.D, 78, 032003 - 032003, 英語

    [査読有り]

    研究論文(学術雑誌)

  • A. Anokhina, S. Aoki, A. Ariga, L. Arrabito, D. Autiero, A. Badertscher, F. Bay, A. Bergnoli, F. Bersani Greggio, M. Besnier, D. Bick, C. Bozza, T. Brugiere, R. Brugnera, G. Brunetti, S. Buontempo, E. Carrara, A. Cazes, L. Chaussard, M. Chernyavsky, V. Chiarella, N. Chon-Sen, A. Chukanov, L. Consiglio, M. Cozzi, F. Dal Corso, G. D'Amato, N. D'Ambrosio, G. De Lellis, Y. Declais, M. De Serio, F. Di Capua, D. Di Ferdinando, A. Di Giovanni, N. Di Marco, C. Di Troia, S. Dmitrievski, A. Dominjon, M. Dracos, D. Duchesneau, B. Dulach, S. Dusini, J. Ebert, O. Egorov, R. Enikeev, A. Ereditato, S. Esposito, J. Favier, G. Felici, T. Ferber, R. Fini, A. Franceschi, T. Fukuda, C. Fukushima, V. I. Galkin, V. A. Galkin, A. Garfagnini, G. Giacomelli, M. Giorgini, C. Goellnitz, D. Golubkov, Y. Gornoushkin, G. Grella, F. Grianti, M. Guler, G. Gusev, C. Gustavino, C. Hagner, T. Hara, M. Hierholzer, S. Hiramatsu, K. Hoshino, M. Ieva, K. Jakovcic, J. Janicsko Csathy, B. Janutta, C. Jollet, F. Juget, T. Kawai, M. Kazuyama, S. H. Kim, M. Kimura, J. Knuesel, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, I. Laktineh, C. Lazzaro, J. Lenkeit, A. Ljubicic, A. Longhin, G. Lutter, K. Manai, G. Mandrioli, S. Manzoor, A. Marotta, J. Marteau, H. Matsuoka, N. Mauri, F. Meisel, A. Meregaglia, M. Messina, P. Migliozzi, S. Miyamoto, P. Monacelli, K. Morishima, U. Moser, M. T. Muciaccia, N. Naganawa, T. Naka, M. Nakamura, T. Nakamura, T. Nakano, V. Nikitina, K. Niwa, Y. Nonoyama, S. Ogawa, V. Osedlo, D. Ossetski, A. Paoloni, B. D. Park, I. G. Park, A. Pastore, L. Patrizii, E. Pennacchio, H. Pessard, C. Pistillo, N. Polukhina, M. Pozzato, K. Pretzl, P. Publichenko, F. Pupilli, T. Roganova, G. Rosa, I. Rostovtseva, A. Rubbia, A. Russo, O. Ryazhskaya, D. Ryzhikov, Y. Sato, O. Sato, V. Saveliev, G. Sazhina, A. Schembri, L. Scotto Lavina, H. Shibuya, S. Simone, M. Sioli, C. Sirignano, G. Sirri, J. S. Song, M. Spinetti, L. Stanco, N. Starkov, M. Stipcevic, T. Strauss, P. Strolin, V. Sugonyaev, Y. Taira, S. Takahashi, M. Tenti, F. Terranova, V. Tioukov, V. Togo, P. Tolun, V. Tsarev, S. Tufanli, N. Ushida, C. Valieri, P. Vilain, M. Vladimirov, L. Votano, L. Vuilleumier, G. Wilquet, B. Wonsak, J. Wurtz, C. S. Yoon, J. Yoshida, Y. Zaitsev, S. Zemskova, A. Zghicheb, R. Zimmermannm

    The OPERA neutrino oscillation experiment is based on the use of the Emulsion Cloud Chamber (ECC). In the OPERA ECC, nuclear emulsion films acting as very high precision tracking detectors are interleaved with lead plates providing a massive target for neutrino interactions. We report on studies related to the effects occurring from the contact between emulsion and lead. A low radioactivity lead is required in order to minimize the number of background tracks in emulsions and to achieve the required performance in the reconstruction of neutrino events. It was observed that adding other chemical elements to the lead, in order to improve the mechanical properties, may significantly increase the level of radioactivity on the emulsions. A detailed study was made in order to choose a lead alloy with good mechanical properties and an appropriate packing technique so as to have a low enough effective radioactivity.

    IOP PUBLISHING LTD, 2008年07月, JOURNAL OF INSTRUMENTATION, 3, 英語

    [査読有り]

    研究論文(学術雑誌)

  • A. Kayis-Topaksu, G. Onengut, R. van Dantzig, M. de Jong, R. G. C. Oldeman, A. Guler, S. Kama, U. Kose, M. Serin-Zeyrek, P. Tolun, M. G. Catanesi, M. T. Muciaccia, A. Buelte, K. Winter, B. Van de Vyver, P. Vilain, G. Wilquet, B. Saitta, E. Di Capua, S. Ogawa, H. Shibuya, I. R. Hristova, T. Kawamura, D. Kolev, M. Litmaath, H. Meinhard, J. Panman, A. Rozanov, R. Tsenov, J. W. E. Uiterwijk, P. Zucchelli, J. Goldberg, M. Chikawa, J. S. Song, C. S. Yoon, K. Kodama, N. Ushida, S. Aoki, T. Hara, T. Delbar, D. Favart, G. Gregoire, S. Kalinin, I. Makhlioueva, A. Artamonov, P. Gorbunov, V. Khovansky, V. Shamanov, I. Tsukerman, N. Bruski, D. Frekers, D. Rondeshagen, T. Wolff, K. Hoshino, J. Kawada, M. Komatsu, A. Miyanishi, M. Nakamura, T. Nakano, K. Narita, K. Niu, K. Niwa, N. Nonaka, O. Sato, T. Toshito, S. Buontempo, A. G. Cocco, N. D'Ambrosio, G. De Lellis, G. De Rosa, F. Di Capua, G. Fiorillo, A. Marotta, M. Messina, P. Migliozzi, R. Santorelli, L. Scotto Lavina, P. Strolin, V. Tioukov, T. Okusawa, U. Dore, P. F. Loverre, L. Ludovici, G. Rosa, R. Santacesaria, A. Satta, F. R. Spada, E. Barbuto, C. Bozza, G. Grella, G. Romano, C. Sirignano, S. Sorrentino, Y. Sato, I. Tezuka

    We present a leading order QCD analysis of a sample of neutrino induced charged-current events with two muons in the final state originating in the lead-scintillating fibre calorimeter of the CHORUS detector. The results are based on a sample of 8910 neutrino and 430 antineutrino induced opposite-sign dimuon events collected during the exposure of the detector to the CERN Wide Band Neutrino Beam between 1995 and 1998. The analysis yields a value of the charm quark mass of m(c) = (1.26 +/- 0.16 +/- 0.09) GeV/c(2) and a value of the ratio of the strange to non-strange sea in the nucleon Of K = 0.33 +/- 0.05 +/- 0.05, improving the results obtained in similar analyses by previous experiments. (c) 2008 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2008年07月, NUCLEAR PHYSICS B, 798 (1-2), 1 - 16, 英語

    [査読有り]

    研究論文(学術雑誌)

  • A. Anokhina, S. Aoki, A. Ariga, L. Arrabito, D. Autiero, A. Badertscher, F. Bay, F. Bersani Greggio, A. Bertolin, M. Besnier, D. Bick, C. Bozza, T. Brugiere, R. Brugnera, G. Brunetti, S. Buontempo, E. Carrara, A. Cazes, L. Chaussard, M. Chernyavsky, V. Chiarella, N. Chon-Sen, A. Chukanov, L. Consiglio, M. Cozzi, V. Cuha, F. Dal Corso, G. D'Amato, N. D'Ambrosio, G. De Lellis, Y. Declais, M. De Serio, F. Di Capua, D. Di Ferdinando, A. Di Giovanni, N. Di Marco, C. Di Troia, S. Dmitrievski, A. Dominjon, M. Dracos, D. Duchesneau, S. Dusini, J. Ebert, O. Egorov, R. Enikeev, A. Ereditato, L. S. Esposito, J. Favier, G. Felici, T. Ferber, R. Fini, D. Frekers, T. Fukuda, V. I. Galkin, V. A. Galkin, A. Garfagnini, G. Giacomelli, M. Giorgini, C. Goellnitz, J. Goldberg, D. Golubkov, Y. Gornushkin, G. Grella, F. Grianti, M. Guler, G. Gusev, C. Gustavino, C. Hagner, T. Hara, M. Hierholzer, S. Hiramatsu, K. Hoshino, M. Ieva, K. Jakovcic, J. Janicsko Csathy, B. Janutta, C. Jollet, F. Juget, T. Kawai, M. Kazuyama, S. H. Kim, J. Knuesel, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, I. Laktineh, C. Lazzaro, J. Lenkeit, A. Ljubicic, A. Longhin, G. Lutter, K. Manai, G. Mandrioli, A. Marotta, J. Marteau, T. Matsuo, H. Matsuoka, N. Mauri, F. Meisel, A. Meregaglia, M. Messina, P. Migliozzi, S. Mikado, S. Miyamoto, P. Monacelli, K. Morishima, U. Moser, M. T. Muciaccia, N. Naganawa, T. Naka, M. Nakamura, T. Nakamura, T. Nakano, V. Nikitina, K. Niwa, Y. Nonoyama, S. Ogawa, V. Osedlo, D. Ossetski, A. Paoloni, B. D. Park, I. G. Park, A. Pastore, L. Patrizii, E. Pennacchio, H. Pessard, V. Pilipenko, C. Pistillo, N. Polukhina, M. Pozzato, K. Pretzl, P. Publichenko, F. Pupilli, T. Roganova, G. Rosa, I. Rostovtseva, A. Rubbia, A. Russo, O. Ryazhskaya, D. Ryzhikov, O. Sato, Y. Sato, V. Saveliev, G. Sazhina, A. Schembri, L. Scotto Lavina, H. Shibuya, S. Simone, M. Sioli, C. Sirignano, G. Sirri, J. S. Song, M. Spinetti, L. Stanco, N. Starkov, M. Stipcevic, T. Strauss, P. Strolin, V. Sugonyaev, Y. Taira, S. Takahashi, M. Tenti, F. Terranova, I. Tezuka, V. Tioukov, P. Tolun, V. Tsarev, S. Tufanli, N. Ushida, P. Vilain, M. Vladimirov, L. Votano, J. L. Vuilleumier, G. Wilquet, B. Wonsak, C. S. Yoon, J. Yoshida, Y. Zaitsev, S. Zemskova, A. Zghiche, R. Zimmermannn

    New methods for efficient and unambiguous interconnection between electronic position sensitive detectors and target units based on nuclear photographic emulsion films have been developed. The application to the OPERA experiment, that aims at detecting nu(mu) reversible arrow nu(tau) oscillations in the CNGS neutrino beam, is reported in this paper. In order to reduce background due to latent tracks collected before installation in the detector, on-site large-scale treatments of the emulsions ("refreshing") have been applied. Changeable Sheet (CSd) packages, each made of a doublet of emulsion films, have been designed, assembled and coupled to the OPERA target units ("ECC bricks"). A device has been built to print X-ray spots for accurate interconnection both within the CSd and between the CSd and the related ECC brick. Sample emulsion films have been extensively scanned with state-of-the-art automated optical microscopes. Efficient track-matching and powerful background rejection have been achieved in tests with electronically tagged penetrating muons. Further improvement of in-doublet film alignment was obtained by matching the pattern of low-energy electron tracks. The commissioning of the overall OPERA alignment procedure is in progress.

    IOP PUBLISHING LTD, 2008年07月, JOURNAL OF INSTRUMENTATION, 3, 英語

    [査読有り]

    研究論文(学術雑誌)

  • E. Eskut et al.

    The final oscillation analysis of the complete set of data collected by CHORUS in the years 1994-1997 is presented. Reconstruction algorithms of data extracted by electronic detectors were improved and the data recorded in the emulsion target were analysed by new automated scanning systems, allowing the use of a new method for event reconstruction in emulsion. CHORUS has applied these new techniques to the sample of 1996-1997 events for which no muons were observed in the electronic detectors. Combining the new sample with the data analysed in previous papers, the overall sensitivity of the experiment to the ντ appearance is thus improved. In a two-neutrino mixing scheme, a 90% C.L. upper limit of sin2 2 θμ τ < 4.4 × 10-4 is set for large Δ m2, improving by a factor 1.5 the previously published CHORUS result. © 2007 Elsevier B.V. All rights reserved.

    2008年04月11日, Nuclear Physics B, 793 (1-2), 326 - 343

    [査読有り]

    研究論文(学術雑誌)

  • Mine S, Alcaraz J.L, Aoki S, Hara T, Suzuki A, Takeuchi Y

    2008年02月25日, Phys. Rev. D, 77, 032003 - 032003, 英語

    [査読有り]

    研究論文(学術雑誌)

  • A. Kayis-Topaksu, G. Oenenguet, R. van Dantzig, M. de Jong, R. G. C. Oldeman, M. Gueler, U. Koese, P. Tolun, M. G. Catanesi, M. T. Muciaccia, K. Winter, B. van de Vyver, P. Vilain, G. Wilquet, B. Saitta, E. Di Capua, S. Ogawa, H. Shibuya, I. R. Hristova, T. Kawamura, D. Kolev, H. Meinhard, J. Panman, A. Rozanov, R. Tsenov, J. W. E. Uiterwijk, P. Zucchelli, J. Goldberg, M. Chikawa, J. S. Song, C. S. Yoon, K. Kodama, N. Ushida, S. Aoki, T. Hara, T. Delbar, D. Favart, G. Gregoire, S. Kalinin, I. Makhlioueva, A. Artamonov, P. Gorbunov, V. Khovansky, V. Shamanov, I. Tsukerman, N. Bruski, D. Frekers, K. Hoshino, J. Kawada, M. Komatsu, M. Miyanishi, M. Nakamura, T. Nakano, K. Narita, K. Niu, K. Niwa, N. Nonaka, O. Sato, T. Toshito, S. Buontempo, A. G. Cocco, N. D'Ambrosio, G. De Lellis, G. De Rosa, F. Di Capua, G. Fiorillo, A. Marotta, P. Migliozzi, L. Scotto Lavina, P. Strolin, V. Tioukov, T. Okusawa, U. Dore, P. F. Loverre, L. Ludovici, G. Rosa, R. Santacesaria, A. Satta, F. R. Spada, E. Barbuto, C. Bozza, G. Grella, G. Romano, C. Sirignano, S. Sorrentino, Y. Sato, I. Tezuka

    In this paper a search for associated charm production both in neutral and charged current nu-nucleus interactions is presented. The improvement of automatic scanning systems in the CHORUS experiment allows an efficient search to be performed in emulsion for short-lived particles. Hence a search for rare processes, like the associated charm production, becomes possible through the observation of the double charm-decay topology with a very low background. About 130000 nu. interactions located in the emulsion target have been analysed. Three events with two charm decays have been observed in the neutral-current sample with an estimated background of 0.18 +/- 0.05. The relative rate of the associated charm cross-section in deep inelastic. interactions, sigma(c (c) over barv)/sigma(DIS)(NC) = (3.62(-2.42)(+2.95)(stat)+/-0.54(sysyt))x10(-3) has been measured. One event with two charm decays has been observed in charged-current nu(mu) interactions with an estimated background of 0.18 +/- 0.06 and the upper limit on associated charm in charged- current interactions at 90% C. L. has been found to be sigma(c (c) over bar mu(-))/sigma(CC) < 9.69 x 10(-4).

    SPRINGER, 2007年11月, EUROPEAN PHYSICAL JOURNAL C, 52 (3), 543 - 552, 英語

    [査読有り]

    研究論文(学術雑誌)

  • T. Watanabe, J. K. Ahn, H. Akikawa, S. Aoki, K. Arai, S. Y. Bahk, K. M. Baik, B. Bassalleck, J. H. Chung, M. S. Chung, D. H. Davis, T. Fukuda, H. Hayata, K. Hoshino, A. Ichikawa, M. Ieiri, K. Imai, Y. H. Iwata, Y. S. Iwata, Y. Kakita, H. Kanda, M. Kaneko, T. Kawai, M. Kawasaki, C. O. Kim, J. Y. Kim, S. J. Kim, S. H. Kim, Y. Kondo, T. Kouketsu, Y. L. Lee, J. W. C. McNabb, M. Mitsuhara, Y. Nagase, C. Nagoshi, K. Nakazawa, H. Noumi, S. Ogawa, H. Okabe, K. Oyama, H. M. Park, I. G. Park, J. Parker, Y. S. Ra, J. T. Rhee, A. Rusek, H. Shibuya, K. S. Sim, P. K. Saha, D. Seki, M. Sekimoto, J. S. Song, H. Takahashi, T. Takahashi, F. Takeutchi, H. Tanaka, K. Tanida, J. Tojo, H. Torii, S. Torikai, T. Tsunemi, D. N. Tovee, N. Ushida, K. Yamamoto, N. Yasuda, J. T. Yang, C. J. Yoon, C. S. Yoon, M. Yosoi, T. Yoshida, L. Zhu

    An event emitting a Sigma(-)-hyperon from a Xi(-)-hyperon nuclear capture at rest has been observed in a hybrid-emulsion experiment. The event has been analyzed as the first observation of the weak decay of the S = - 2 system.

    SPRINGER, 2007年09月, EUROPEAN PHYSICAL JOURNAL A, 33 (3), 265 - 268, 英語

    [査読有り]

    研究論文(学術雑誌)

  • A. Kayis-Topaksu, G. Onengut, R. van Dantzig, M. de Jong, R. G. C. Oldeman, M. Guler, U. Kose, P. Tolun, M. G. Catanesi, M. T. Muciaccia, K. Winter, B. Van de Vyver, P. Vilain, G. Wilquet, B. Saitta, E. Di Capua, S. Ogawa, H. Shibuya, I. R. Hristovalo, T. Kawamura, D. Kolev, H. Meinhard, J. Panman, A. Rozanov, R. Tsenov, J. W. E. Uiterwijk, P. Zucchelli, J. Goldberg, M. Chikawa, J. S. Song, C. S. Yoon, K. Kodama, N. Ushida, S. Aoki, T. Hara, T. Delbar, D. Favart, G. Gregoire, S. Kalinin, I. Makhlioueva, A. Artamonov, P. Gorbunov, V. Khovansky, V. Shamanov, I. Tsukerman, N. Bruski, D. Frekers, K. Hoshino, J. Kawada, M. Komatsu, M. Miyanishi, M. Nakamura, T. Nakano, K. Narita, K. Niu, K. Niwa, N. Nonaka, O. Sato, T. Toshito, S. Buontempo, A. G. Cocco, N. D'Ambrosi, G. De Lellis, G. De Rosa, F. Di Capua, G. Fiorillo, A. Marotta, P. Migliozzi, L. Scotto Lavina, P. Strolin, V. Tioukov, T. Okusawa, U. Dore, P. F. Loverre, L. Ludovici, G. Rosa, R. Santacesaria, A. Satta, F. R. Spada, E. Barbuto, C. Bozza, G. Grella, G. Romano, C. Sirignano, S. Sorrentino, Y. Sato, I. Tezuka

    The CHORUS experiment, designed to search for nu(mu) -> nu(tau) oscillations, consists of a nuclear emulsion target and electronic detectors. In this paper, results on the production of charged particles in a small sample of charged-current neutrino- and ant i- neutrino-nucleus interactions at high energy are presented. For each event, the emission angle and the ionization features of the charged particles produced in the interaction are recorded, while the standard kinematic variables are reconstructed using the electronic detectors. The average multiplicities for charged tracks, the pseudo-rapidity distributions, the dispersion in the multiplicity of charged particles and the KNO scaling are studied in different kinematical regions. A study of quasi-elastic topologies performed for the first time in nuclear emulsions is also reported. The results are presented in a form suitable for use in the validation of Monte Carlo generators of neutrino-nucleus interactions.

    SPRINGER, 2007年08月, EUROPEAN PHYSICAL JOURNAL C, 51 (4), 775 - 785, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Amako, K., Aoki, S., Asai, M., Ban, T., Fukuda, T., Fukushima, C., Kameoka, S., Kanazawa, M., Kanematsu, N., Kodama, K., Koi, T., Komatsu, M., Komori, M., Kubota, H., Murakami, K., Naganawa, N., Nakamura, T., Nakano, T., Natsume, M., Niwa, K., Ogawa, S., Ozaki, M., Sasaki, T., Sato, S., Shibasaki, M., Shibuya, H., Sihver, L., Takahashi, S., Toshito, T., Yoshida, H., Yoshida, J., Yusa, K.

    2007年05月, Physical Review C - Nuclear Physics, 75 (5), 英語

    [査読有り]

    研究論文(学術雑誌)

  • K. Kodama, N. Saoulidou, G. Tzanakos, B. Baller, B. Lundberg, R. Rameika, J. S. Song, C. S. Yoon, S. H. Chung, S. Aoki, T. Hara, C. Erickson, K. Heller, R. Schwienhorst, J. Sielafff, J. Trammell, K. Hoshino, J. Kawada, M. Komatsu, M. Miyanishi, M. Nakamura, T. Nakano, K. Narita, K. Niwa, N. Nonaka, K. Okada, O. Sato, T. Toshito, S. Miyamoto, S. Takahashi, B. D. Park, T. Furukawa, V. Paolone, T. Kafka

    We present a method of momentum measurement of charged particles using emulsion data from the DONuT experiment, and report results from the momentum analysis of secondary particles from neutrino interactions. In 578 neutrino interactions, 2338 secondary particles were analyzed and 83.2% of attempted particles were measured by multiple coulomb scattering. (c) 2007 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2007年04月, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 574 (1), 192 - 198, 英語

    [査読有り]

    研究論文(学術雑誌)

  • R. Acquafredda, N. Agafonova, M. Ambrosio, A. Anokhina, S. Aoki, A. Ariga, L. Arrabito, D. Autiero, A. Badertscher, E. Baussan, A. Bergnoli, F. Bersani Greggio, M. Besnier, M. Beyer, S. Bondil-Blin, K. Borer, J. Boucrot, V. Boyarkin, C. Bozza, R. Brugnera, S. Buontempo, Y. Caffari, J. E. Campagne, B. Carlus, E. Carrara, A. Cazes, L. Chaussard, M. Chernyavsky, V. Chiarella, N. Chon-Sen, A. Chukanov, R. Ciesielski, L. Consiglio, M. Cozzi, F. Dal Corso, N. D'Ambrosio, J. Damet, G. De Lellis, Y. Declais, T. Descombes, M. De Serio, F. Di Capua, D. Di Ferdinando, A. Di Giovanni, N. Di Marco, C. Di Troia, S. Dmitrievski, M. Dracos, D. Duchesneau, B. Dulach, S. Dusini, J. Ebert, R. Enikeev, A. Ereditato, L. S. Esposito, C. Fanin, J. Favier, G. Felici, T. Ferber, L. Fournier, A. Franceschi, D. Frekers, T. Fukuda, C. Fukushima, V. I. Galkin, V. A. Galkin, R. Gallet, A. Garfagnini, G. Gaudiot, G. Giacomelli, O. Giarmana, M. Giorgini, L. Girard, C. Girerd, C. Goellnitz, J. Goldberg, Y. Gornoushkin, G. Grella, F. Grianti, C. Guerin, M. Guler, C. Gustavino, C. Hagner, T. Hamane, T. Hara, M. Hauger, M. Hess, K. Hoshino, M. Ieva, M. Incurvati, K. Jakovcic, J. Janicsko Csathy, B. Janutta, C. Jollet, F. Juget, M. Kazuyama, S. H. Kim, M. Kimura, J. Knuesel, K. Kodama, D. Kolev, M. Komatsu, U. Kose, A. Krasnoperov, I. Kreslo, Z. Krumstein, I. Laktineh, C. de La Taille, T. Le Flour, S. Lieunard, A. Ljubicic, A. Longhin, A. Malgin, K. Manai, G. Mandrioli, U. Mantello, A. Marotta, J. Marteau, G. Martin-Chassard, V. Matveev, M. Messina, L. Meyer, S. Micanovic, P. Migliozzi, S. Miyamoto, P. Monacelli, I. Monteiro, K. Morishima, U. Moser, M. T. Muciaccia, P. Mugnier, N. Naganawa, M. Nakamura, T. Nakano, T. Napolitano, M. Natsume, K. Niwa, Y. Nonoyama, A. Nozdrin, S. Ogawa, A. Olchevski, D. Orlandi, D. Ossetski, A. Paoloni, B. D. Park, I. G. Park, A. Pastore, L. Patrizii, L. Pellegrino, H. Pessard, V. Pilipenko, C. Pistillo, N. Polukhina, M. Pozzato, K. Pretzl, P. Publichenko, L. Raux, J. P. Repellin, T. Roganova, G. Romano, G. Rosa, A. Rubbia, V. Ryasny, O. Ryazhskaya, D. Ryzhikov, A. Sadovski, C. Sanelli, O. Sato, Y. Sato, V. Saveliev, N. Savvinov, G. Sazhina, A. Schembri, W. Schmidt Parzefall, H. Schroeder, H. U. Schuetz, L. Scotto Lavina, J. Sewing, H. Shibuya, S. Simone, M. Sioli, C. Sirignano, G. Sirri, J. S. Song, R. Spaeti, M. Spinetti, L. Stanco, N. Starkov, M. Stipcevic, P. Strolin, V. Sugonyaev, S. Takahashi, V. Tereschenko, F. Terranova, I. Tezuka, V. Tioukov, I. Tikhomirov, P. Tolun, T. Toshito, V. Tsarev, R. Tsenov, U. Ugolino, N. Ushida, G. Van Beek, V. Verguilov, P. Vilain, L. Votano, J. L. Vuilleumier, T. Waelchli, R. Waldi, M. Weber, G. Wilquet, B. Wonsak, R. Wurth, J. Wurtz, V. Yakushev, C. S. Yoon, Y. Zaitsev, I. Zamboni, R. Zimmermann

    The OPERA neutrino detector at the underground Gran Sasso Laboratory (LNGS) was designed to perform the first detection of neutrino oscillations in appearance mode, through the study of nu(mu) --> nu(tau) oscillations. The apparatus consists of a lead/emulsion-film target complemented by electronic detectors. It is placed in the high-energy, long-baseline CERN to LNGS beam (CNGS) 730 km away from the neutrino source. In August 2006, a first run with CNGS neutrinos was successfully conducted. A first sample of neutrino events was collected, statistically consistent with the integrated beam intensity. After a brief description of the beam and of the various sub-detectors, we report on the achievement of this milestone, presenting the first data and some analysis results.

    IOP PUBLISHING LTD, 2006年12月, NEW JOURNAL OF PHYSICS, 8, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Ahn, M.H., Aliu, E., Andringa, S., Aoki, S., Aoyama, Y., Argyriades, J., Asakura, K., Ashie, R., Berghaus, F., Berns, H.G., Bhang, H., Blondel, A., Borghi, S., Bouchez, J., Boyd, S.C., Burguet-Castell, J., Casper, D., Catala, J., Cavata, C., Cervera, A., Chen, S.M., Cho, K.O., Choi, J.H., Dore, U., Echigo, S., Espinal, X., Fechner, M., Fernandez, E., Fujii, K., Fujii, Y., Fukuda, S., Fukuda, Y., Gomez-Cadenas, J., Gran, R., Hara, T., Hasegawa, M., Hasegawa, T., Hayashi, K., Hayato, Y., Helmer, R.L., Higuchi, I., Hill, J., Hiraide, K., Hirose, E., Hosaka, J., Ichikawa, A.K., Ieiri, M., Iinuma, M., Ikeda, A., Inagaki, T., Ishida, T., Ishihara, K., Ishii, H., Ishii, T., Ishino, H., Ishitsuka, M., Itow, Y., Iwashita, T., Jang, H.I., Jang, J.S., Jeon, E.J., Jeong, I.S., Joo, K.K., Jover, G., Jung, C.K., Kajita, T., Kameda, J., Kaneyuki, K., Kang, B.H., Kato, I., Kato, Y., Kearns, E., Kerr, D., Kim, C.O., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kim, B.J., Kim, H.I., Kim, J.H., Kim, J.Y., Kim, S.B., Kitamura, M., Kitching, P., Kobayashi, K., Kobayashi, T., Kohama, M., Konaka, A., Koshio, Y., Kropp, W., Kubota, J., Kudenko, Yu., Kume, G., Kuno, Y., Kurimoto, Y., Kutter, T., Learned, J., Likhoded, S., Lim, I.T., Lim, S.H., Loverre, P.F., Ludovici, L., Maesaka, H., Mallet, J., Mariani, C., Martens, K., Maruyama, T., Matsuno, S., Matveev, V., Mauger, C., McConnel Mahn, K.B., McGrew, C., Mikheyev, S., Minakawa, M., Minamino, A., Mine, S., Mineev, O., Mitsuda, C., Mitsuka, G., Miura, M., Moriguchi, Y., Morita, T., Moriyama, S., Nakadaira, T., Nakahata, M., Nakamura, K., Nakano, I., Nakata, F., Nakaya, T., Nakayama, S., Namba, T., Nambu, R., Nawang, S., Nishikawa, K., Nishino, H., Nishiyama, S., Nitta, K., Noda, S., Noumi, H., Nova, F., Novella, P., Obayashi, Y., Okada, A., Okumura, K., Okumura, M., Onchi, M., Ooyabu, T., Oser, S.M., Otaki, T., Oyama, Y., Pac, M.Y., Park, H., Pierre, F., Rodriguez, A., Saji, C., Sakai, A., Sakuda, M., Sakurai, N., Sanchez, F., Sarrat, A., Sasaki, T., Sato, H., Sato, K., Scholberg, K., Schroeter, R., Sekiguchi, M., Seo, E., Sharkey, E., Shima, A., Shiozawa, M., Shiraishi, K., Sitjes, G., Smy, M., So, H., Sobel, H., Sorel, M., Stone, J., Sulak, L., Suga, Y., Suzuki, A., Suzuki, Y., Suzuki, Y., Tada, M., Takahashi, T., Takasaki, M., Takatsuki, M., Takenaga, Y., Takenaka, K., Takeuchi, H., Takeuchi, Y., Taki, K., Takubo, Y., Tamura, N., Tanaka, H., Tanaka, K., Tanaka, M., Tanaka, Y., Tashiro, K., Terri, R., T'Jampens, S., Tornero-Lopez, A., Toshito, T., Totsuka, Y., Ueda, S., Vagins, M., Whitehead, L., Walter, C.W., Wang, W., Wilkes, R.J., Yamada, S., Yamada, Y., Yamamoto, S., Yamanoi, Y., Yanagisawa, C., Yershov, N., Yokoyama, H., Yokoyama, M., Yoo, J., Yoshida, M., Zalipska, J.

    2006年10月02日, Phys.Rev.D, 74, 072003 - 072003, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Gran, R., Jeon, E.J., Aliu, E., Andringa, S., Aoki, S., Argyriades, J., Asakura, K., Ashie, R., Berghaus, F., Berns, H., Bhang, H., Blondel, A., Borghi, S., Bouchez, J., Burguet-Castell, J., Casper, D., Catala, J., Cavata, C., Cervera, A., Chen, S.M., Cho, K.O., Choi, J.H., Dore, U., Espinal, X., Fechner, M., Fernandez, E., Fukuda, Y., Gomez-Cadenas, J., Hara, T., Hasegawa, M., Hasegawa, T., Hayashi, K., Hayato, Y., Helmer, R.L., Hiraide, K., Hosaka, J., Ichikawa, A.K., Iinuma, M., Ikeda, A., Inagaki, T., Ishida, T., Ishihara, K., Ishii, T., Ishitsuka, M., Itow, Y., Iwashita, T., Jang, H.I., Jeong, I.S., Joo, K.K., Jover Manas, Gabriel V., Jung, C.K., Kajita, T., Kameda, J., Kaneyuki, K., Kato, I., Kearns, E., Kerr, D., Kim, C.O., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kim, J.Y., Kim, S.B., Kitching, P., Kobayashi, K., Kobayashi, T., Konaka, A., Koshio, Y., Kropp, W., Kubota, J., Kudenko, Yu., Kuno, Y., Kurimoto, Y., Kutter, T., Learned, J., Likhoded, S., Lim, I.T., Loverre, P.F., Ludovici, L., Maesaka, H., Mallet, J., Mariani, C., Matsuno, S., Matveev, V., McConnel, K., McGrew, C., Mikheyev, S., Minamino, A., Mine, S., Mineev, O., Mitsuda, C., Miura, M., Moriguchi, Y., Morita, T., Moriyama, S., Nakadaira, T., Nakahata, M., Nakamura, K., Nakano, I., Nakaya, T., Nakayama, S., Namba, T., Nambu, R., Nawang, S., Nishikawa, K., Nitta, K., Nova, F., Novella, P., Obayashi, Y., Okada, A., Okumura, K., Oser, S.M., Oyama, Y., Pac, M.Y., Pierre, F., Rodriguez, A., Saji, C., Sakuda, M., Sanchez, F., Sarrat, A., Sasaki, T., Sato, H., Scholberg, K., Schroeter, R., Sekiguchi, M., Shiozawa, M., Shiraishi, K., Sitjes, G., Smy, M., Sobel, H., Sorel, M., Stone, J., Sulak, L., Suzuki, A., Suzuki, Y., Takahashi, T., Takenaga, Y., Takeuchi, Y., Taki, K., Takubo, Y., Tamura, N., Tanaka, M., Terri, R., T'Jampens, S., Tornero-Lopez, A., Totsuka, Y., Ueda, S., Vagins, M., Whitehead, L., Walter, C.W., Wang, W., Wilkes, R.J., Yamada, S., Yamamoto, S., Yanagisawa, C., Yershov, N., Yokoyama, H., Yokoyama, M., Yoo, J., Yoshida, M., Zalipska, J.

    2006年09月13日, Phys.Rev.D, 74, 052002 - 052002, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Yamamoto S, Zalipska J, Aoki S, Hara T, Suzuki A, Takeuchi Y

    2006年05月12日, Phys. Rev. Lett., 96, 181801 - 181801, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Ahn J.K, Aoki S, Chung K.S, Chung M.S, En-yo H

    In this letter we report on the cross-section measurements for Xi(-)p elastic and inelastic scatterings at low energy using an active scintillating fiber target. Upper limit for the total cross section of the elastic scattering was found to be 24 mb at 90% confidence level, and the total cross section for the Xi(-) p -> Lambda Lambda reaction was found to be 4.3(-2.7)(+6.3) mb. We compare these results with currently competing theoretical estimates. (c) 2006 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2006年02月, Phys. Lett. B, 633 (2-3), 214 - 218, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Amako, K., Aoki, S., Asai, M., Ban, T., Fukuda, T., Fukushima, C., Kameoka, S., Kanazawa, M., Kanematsu, N., Kodama, K., Koi, T., Komori, M., Murakami, K., Naganawa, N., Nakamura, T., Natsume, M., Niwa, K., Ogawa, S., Ozaki, M., Sasaki, T., Sato, S., Shibasaki, M., Shibuya, H., Takahashi, S., Toshito, T., Yusa, K.

    2006年01月15日, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 556 (2), 英語

    [査読有り]

    研究論文(学術雑誌)

  • G Onengut, R van Dantzig, M de Jong, RGC Oldeman, M Guler, S Kama, U Kose, M Serin-Zeyrek, P Tolun, MG Catanesi, MT Muciaccia, A Bulte, K Winter, B Van de Vyver, P Vilain, G Wilquet, B Saitta, E Di Capua, S Ogawa, H Shibuya, IR Hristova, A Kayis-Topaksu, T Kawamura, D Kolev, M Litmaath, H Meinhard, J Panman, A Rozanov, R Tsenov, JWE Uiterwijk, P Zuechelli, J Goldberg, M Chikawa, JS Song, CS Yoon, K Kodama, N Ushida, S Aoki, T Hara, T Delbar, D Favart, G Gregoire, S Kalinin, Makhlioueva, I, A Artamonov, P Gorbunov, Khovansky, V, Shamanov, V, Tsukerman, I, N Bruski, D Frekers, D Rondeshagen, T Wolff, K Hoshino, J Kawada, M Komatsu, M Miyanishi, M Nakamura, T Nakano, K Narita, K Niu, K Niwa, N Nonaka, O Sato, T Toshito, S Buontempo, AG Cocco, N D'Ambrosio, G De Lellis, G De Rosa, F Di Capua, G Fiorillo, A Marotta, M Messina, P Migliozzi, R Santorelli, LS Lavina, P Strolin, Tioukov, V, T Okusawa, U Dore, PF Loverre, L Ludovici, G Rosa, R Santacesaria, A Satta, FR Spada, E Barbuto, C Bozza, G Grella, G Romano, C Sirignano, S Sorrentino, Y Sato, Tezuka, I

    After completion of the data taking for the v(mu) -> v(tau) oscillation search, the CHORUS lead-scintillator calorimeter was used in the 1998 run as an active target. High-statistics samples of charged-current interactions were collected in the CERN SPS west area neutrino beam. This beam contained predominantly muon (anti-)neutrinos from sign-selected pious and kaons. We measure the flux and energy spectrum of the incident neutrinos and compare them with beam simulations. The neutrino-nucleon and anti-neutrino-nucleon differential cross-sections are measured in the range 0.01 < x < 0.7, 0.05 < y < 0.95, 10 < E-v < 200 GeV. We extract the neutrino-nucleon structure functions F-2(x, Q(2)), xF(3) (x, Q(2)), and R(x, Q2) and compare these with results from other experiments. (c) 2005 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2006年01月, PHYSICS LETTERS B, 632 (1), 65 - 75, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Hasegawa, M., Aliu, E., Andringa, S., Aoki, S., Argyriades, J., Asakura, K., Ashie, R., Berns, H., Bhang, H., Blondel, A., Borghi, S., Bouchez, J., Burguet-Castell, J., Casper, D., Cavata, C., Cervera, A., Chen, S.M., Cho, K.O., Choi, J.H., Dore, U., Espinal, X., Fechner, M., Fernandez, E., Fukuda, Y., Gomez-Cadenas, J., Gran, R., Hara, T., Hasegawa, T., Hayashi, K., Hayato, Y., Helmer, R.L., Hill, J., Hiraide, K., Hosaka, J., Ichikawa, A.K., Iinuma, M., Ikeda, A., Inagaki, T., Ishida, T., Ishihara, K., Ishii, T., Ishitsuka, M., Itow, Y., Iwashita, T., Jang, H.I., Jeon, E.J., Jeong, I.S., Joo, K.K., Jover Manas, Gabriel V., Jung, C.K., Kajita, T., Kameda, J., Kaneyuki, K., Kato, I., Kearns, E., Kerr, D., Kim, C.O., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kim, J.Y., Kim, S.B., Kitching, P., Kobayashi, K., Kobayashi, T., Konaka, A., Koshio, Y., Kropp, W., Kubota, J., Kudenko, Yu., Kuno, Y., Kutter, T., Learned, J., Likhoded, S., Lim, I.T., Loverre, P.F., Ludovici, L., Maesaka, H., Mallet, J., Mariani, C., Maruyama, T., Matsuno, S., Matveev, V., Mauger, C., McConnel Mahn, Kendall Brianna, McGrew, C., Mikheyev, S., Minamino, A., Mine, S., Mineev, O., Mitsuda, C., Miura, M., Moriguchi, Y., Morita, T., Moriyama, S., Nakadaira, T., Nakahata, M., Nakamura, K., Nakano, I., Nakaya, T., Nakayama, S., Namba, T., Nambu, R., Nawang, S., Nishikawa, K., Nitta, K., Nova, F., Novella, P., Obayashi, Y., Okada, A., Okumura, K., Oser, S.M., Oyama, Y., Pac, M.Y., Pierre, F., Rodriguez, A., Saji, C., Sakuda, M., Sanchez, F., Sarrat, A., Sasaki, T., Sato, H., Scholberg, K., Schroeter, R., Sekiguchi, M., Sharkey, E., Shiozawa, M., Shiraishi, K., Sitjes, G., Smy, M., Sobel, H., Stone, J., Sulak, L., Suzuki, A., Suzuki, Y., Takahashi, T., Takenaga, Y., Takeuchi, Y., Taki, K., Takubo, Y., Tamura, N., Tanaka, M., Terri, R., T'Jampens, S., Tornero-Lopez, A., Totsuka, Y., Ueda, S., Vagins, M., Whitehead, L., Walter, C.W., Wang, W., Wilkes, R.J., Yamada, S., Yamamoto, S., Yanagisawa, C., Yershov, N., Yokoyama, H., Yokoyama, M., Yoo, J., Yoshida, M., Zalipska, J.

    2005年12月16日, Phys.Rev.Lett., 95, 252301 - 252301, 英語

    [査読有り]

    研究論文(学術雑誌)

  • S Yamamoto, S Andringa, S Aoki, S Choi, U Dore, Espinal, X, JJ Gomez-Cadenas, R Gran, M Hasegawa, K Hayashi, K Hayashi, Y Hayato, K Hiraide, AK Ichikawa, M Iinuma, JS Jang, EJ Jeon, KK Joo, G Jover-Manas, CK Jung, Kato, I, D Kerr, JY Kim, SB Kim, K Kobayashi, A Kohara, J Kubota, Y Kudenko, Y Kuno, MJ Lee, E Lessac-Chenin, IT Lim, PF Loverre, L Ludovici, H Maesaka, C Mariani, C McGrew, O Mineev, T Morita, T Murakami, Y Nakanishi, T Nakaya, S Nawang, K Nishikawa, K Nitta, F Nova, MY Pac, EJ Rhee, A Rodriguez, F Sanchez, T Sasaki, KK Shiraishi, A Suzuki, T Takahashi, Y Takubo, M Tanaka, R Terri, A Tornero-Lopez, S Ueda, L Whitehead, RJ Wilkes, M Yokoyama, M Yoshida

    A new near detector for the K2K long baseline neutrino experiment, the SciBar, was constructed and started data taking to study neutrino interactions. In K2K, neutrino oscillation is studied by comparing the number of neutrino interactions and energy spectrum between near and far detectors. In order to study neutrino oscillations more precisely, it is necessary to improve the measurement of neutrino spectrum and interactions below 1 GeV, where the latest K2K results suggest maximum oscillation. For that purpose, SciBar is designed to be fully active with fine segmentation. We present the design and basic performance. All detector components have been working as expected. Also presented are the measurements of charged current interactions which are used in the latest K2K oscillation analysis.

    IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005年12月, IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 52 (6), 2992 - 2997, 英語

    [査読有り]

    研究論文(学術雑誌)

  • A Kayis-Topaksu, G Onengut, R van Dantzig, M de Jong, RGC Oldeman, M Guler, U Kose, P Tolun, MG Catanesi, MT Muciaccia, K Winter, BV de Vyver, P Vilain, G Wilquet, B Saitta, E Di Capua, S Ogawa, H Shibuya, IR Hristova, T Kawamura, D Kolev, H Meinhard, J Panman, A Rozanov, R Tsenov, JWE Uiterwijk, P Zucchelli, J Goldberg, M Chikawa, JS Song, CS Yoon, K Kodama, N Ushida, S Aoki, T Hara, Delbar, I, D Favart, G Gregoire, S Kalinin, Makhlioueva, I, A Artamonov, P Gorbunov, Khovansky, V, Shamanov, V, Tsukerman, I, N Bruski, D Frekers, K Hoshino, J Kawada, M Komatsu, M Miyanishi, M Nakamura, T Nakano, K Narita, K Niu, K Niwa, N Nonaka, O Sato, T Toshito, S Buontempo, AG Cocco, N D'Ambrosio, G De Lellis, G De Rosa, F Di Capua, G Fiorillo, A Marotta, M Messina, P Migliozzi, LS Lavina, P Strolin, Tioukov, V, T Okusawa, U Dore, PF Loverre, L Ludovici, G Rosa, R Santacesaria, A Satta, ER Spada, E Barbuto, C Bozza, G Grella, G Romano, C Sirignano, S Sorrentino, Y Sato, Tezuka, I

    From 1994 to 1997, the emulsion target of the CHORUS detector was exposed to the wideband neutrino beam of the CERN SPS. In total about 100 000 charged-current neutrino interactions were located in the nuclear emulsion target and fully reconstructed. From this sample of events based on the data acquired by new automatic scanning systems; 2013 charm-decay events were selected by a pattern recognition program. They were confirmed as decays through visual inspection. Based on these events, the effective branching ratio of charmed particles into muons was determined to be (B) over bar (mu) = [7.3 +/- 0.8(stat) +/- 0.2(syst)] x 10(-2). In addition, the muonic branching ratios are presented for dominating charm-decay topologies. Normalization of the muonic decays to charged-current interactions provides sigma(mu)-(mu)+/sigma(cc) = [3.16 +/- 0.34(stat) 0.09(syst)] x 10(-3). Selecting only events with visible energy greater than 30 GeV gives a value of (B) over bar (mu) that is less affected by the charm production threshold and quasi-elastic Delta(+)(c) production. Combining this value with the current average of B 12 of vertical bar V-cd vertical bar(LO) = 0. 236 +/- 0.016. (c) 2005 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2005年10月, PHYSICS LETTERS B, 626, 24 - 34, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Nakayama S, Mauger C, Aoki S, Hara T, Suzuki A, Takeuchi Y

    2005年07月21日, Physics Letters B., 619, 255 - 262, 英語

    [査読有り]

    研究論文(学術雑誌)

  • G Onengut, R van Dantzig, M de Jong, RGC Oldeman, M Guler, U Kose, P Tolun, MG Catanesi, MT Muciaccia, K Winter, B Van de Vyver, P Vilain, G Wilquet, B Saitta, E Di Capua, S Ogawa, H Shibuya, IR Hristova, A Kayis-Topaksu, T Kawamura, D Kolev, H Meinhard, J Panman, A Rozanov, R Tsenov, JWE Uiterwijk, P Zucchelli, J Goldberg, M Chikawa, JS Song, CS Yoon, K Kodama, N Ushida, S Aoki, T Hara, T Delbar, D Favart, G Gregoire, S Kalinin, Makhlioueva, I, A Artamonov, P Gorbunov, Khovansky, V, Shamanov, V, Tsukerman, I, N Bruski, D Frekers, K Hoshino, J Kawada, M Komatsu, M Miyanishi, M Nakamura, T Nakano, K Narita, K Niu, K Niwa, N Nonaka, O Sato, T Toshito, S Buontempo, AG Cocco, N D'Ambrosio, G De Lellis, G De Rosa, F Di Capua, G Fiorillo, A Marotta, M Messina, P Migliozzi, LS Lavina, P Strolin, Tioukov, V, T Okusawa, U Dore, PF Loverre, L Ludovici, G Rosa, R Santacesaria, A Satta, FR Spada, E Barbuto, C Bozza, G Grella, G Romano, C Sirignano, S Sorrentino, Y Sato, Tezuka, I

    A systematic search for superfragments (charmed nuclei) has been performed in 22 200 neutrinoemulsion interactions obtained with the CHORUS experiment making use of automatic off-line image analysis. The absence of candidates provides an upper limit for the superfragment production rate of 1.9 x 10(-4) (90% C.L.) relative to neutrino charged-current interactions at an average neutrino energy of 27 GeV. In the same analysis 28 hyperfragment decays were found. For the first time, a production rate of hyperfragments in neutrino-emulsion interactions was obtained. The value of the hyperfragment production rate relative to the neutrino charged-current cross-section was found to be (2.0 +/- 0.4(stat) +/- 0.3 (syst)) x 10(-3). (c) 2005 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2005年07月, NUCLEAR PHYSICS B, 718 (1-2), 35 - 54, 英語

    [査読有り]

    研究論文(学術雑誌)

  • G Onengut, R van Dantzig, M de Jong, RGC Oldeman, M Guler, U Kose, P Tolun, MG Catanesi, MT Muciaccia, K Winter, B Van de Vyver, P Vilain, G Wilquet, B Saitta, E Di Capua, S Ogawa, H Shibuya, IR Hristova, A Kayis-Topaksu, T Kawamura, D Kolev, H Meinhard, J Panman, A Rozanov, R Tsenov, JWE Uiterwijk, P Zucchelli, J Goldberg, M Chikawa, JS Song, CS Yoon, K Kodama, N Ushida, S Aoki, T Hara, T Delbar, D Favart, G Gregoire, S Kalinin, Makhlioueva, I, A Artamonov, P Gorbunov, Khovansky, V, Shamanov, V, Tsukerman, I, N Bruski, D Frekers, K Hoshino, J Kawada, M Komatsu, M Miyanishi, M Nakamura, T Nakano, K Narita, K Niu, K Niwa, N Nonaka, O Sato, T Toshito, S Buontempo, AG Cocco, N D'Ambrosio, G De Lellis, G De Rosa, F Di Capua, G Fiorillo, A Marotta, M Messina, P Migliozzi, LS Lavina, M Sorrentino, P Strolin, Tioukov, V, T Okusawa, U Dore, R Loverre, L Ludovici, G Rosa, R Santacesaria, A Satta, FR Spada, E Barbuto, C Bozza, G Grella, G Romano, C Sirignano, S Sorrentino, Y Sato, Tezuka, I

    During the years 1994-1997, the emulsion target of the CHORUS detector was exposed to the wide-band neutrino beam of the CERN SPS of 27 GeV average neutrino energy. In total about 100 000 charged-current neutrino interactions were located in the nuclear emulsion target and fully reconstructed. From this sample of events which was based on the data acquired by new automatic scanning systems, 1048 charged-current interactions with a Do in the final state were selected by a pattern recognition program and confirmed as neutral-particle decays through visual inspection. The ratio of decay branching fractions of the Do into four charged particles to two charged particles was measured to be B(D-0 &RARR; V4)/B(D-0 &RARR; V2) = 0.207 &PLUSMN; 0.016 &PLUSMN; 0.004. The inclusive measurement of the observed production rate of the Do with a decay into four charged prongs in combination with external measurements of this topological branching ratio was used to determine the total Do production rate by neutrinos without additional assumption on the branching fractions. The value of this rate relative to the charged-current cross-section was found to be σ (D-0) / σ (CC) = 0.0269 &PLUSMN; 0.0018 &PLUSMN; 0.0013. In addition, the same normalization method was used to deduce the inclusive topological decay rate into final states with neutral particles only. A value of 0.218 &PLUSMN; 0.049 &PLUSMN; 0.036 was found for this branching fraction. From an observed number of three charged six-prong events the branching ratio into six charged particles was determined to be (1.2(-0.9)(+1.3) &PLUSMN; 0.2) x 10(-3). A measurement of the energy dependence of the D-0 production by neutrinos relative to the total charged-current cross-section is also reported. This measurement was used to deduce for m(c), the effective charm-quark mass, a value of (1.42 &PLUSMN; 0.08) GeV/c(2). © 2005 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2005年05月, PHYSICS LETTERS B, 613 (3-4), 105 - 117, 英語

    [査読有り]

    研究論文(学術雑誌)

  • G Onengut, R van Dantzig, M de Jong, RGC Oldeman, M Guler, U Kose, P Tolun, MG Catanesi, MT Muciaccia, BV de Vyver, P Vilain, G Wilquet, B Saitta, E Di Capua, S Ogawa, H Shibuya, IR Hristova, A Kayis-Topaksu, T Kawamura, D Kolev, H Meinhard, J Panman, A Rozanov, R Tsenov, JWE Uiterwijk, P Zucchelli, J Goldberg, M Chikawa, JS Song, CS Yoon, K Kodama, N Ushida, S Aoki, T Hara, T Delbar, D Favart, G Gregoire, S Kalinin, Makhlioueva, I, A Artamonov, P Gorbunov, Khovansky, V, Shamanov, V, Tsukerman, I, N Bruski, D Frekers, K Hoshino, J Kawada, M Komatsu, M Miyanishi, M Nakamura, T Nakano, K Narita, K Niu, K Niwa, N Nonaka, O Sato, T Toshito, S Buontempo, AG Cocco, N D'Ambrosio, G De Lellis, G De Rosa, F Di Capua, G Fiorillo, A Marotta, M Messina, P Migliozzi, LS Lavina, P Strolin, Tioukov, V, T Okusawa, U Dore, R Loverre, L Ludovici, G Rosa, R Santacesaria, A Satta, FR Spada, E Barbuto, C Bozza, G Grella, G Romano, C Sirignano, S Sorrentino, Y Sato, Tezuka, I

    During the years 1994-1997, the emulsion target of the CHORUS detector was exposed to the wide-band neutrino beam of the CERN SPS of 27 GeV average neutrino energy. In total about 100 000 charged-current neutrino interactions were located in the nuclear emulsion target and fully reconstructed. A high-statistics sample of neutrino interactions with a Do in the final state was collected. Using the decay mode D*(+) -> D(0)pi(+) a production cross-section measurement of the D*+ in neutrinonucleon charged-current interactions was performed. The low Q-value of the decay was used to isolate a sample of candidate events containing a positive hadron with a small PT with respect to the DO direction. A signal of 22.1 +/- 5.5 D*+ events was obtained. The D*(+) production cross-section relative to the D-0 production cross-section, sigma(D*(+))/sigma (D-0), was estimated to be 0.38 +/- 0.09(stat) +/- 0.05(syst). From this result, the fraction of Do's produced via the decay of a D* was deduced to be 0.63 +/- 0.17. The D*(+) production cross-section relative to the nu(mu) charged-current interaction, sigma(D*(+))/sigma(CC), was estimated to be [1.02 +/- 0.25(stat) +/- 0.15(syst)]%. (c) 2005 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2005年05月, PHYSICS LETTERS B, 614 (3-4), 155 - 164, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Aliu, E., Andringa, S., Aoki, S., Argyriades, J., Asakura, K., Ashie, R., Berns, H., Bhang, H., Blondel, A., Borghi, S., Bouchez, J., Burguet-Castell, J., Casper, D., Cavata, C., Cervera, A., Cho, K.O., Choi, J.H., Dore, U., Espinal, X., Fechner, M., Fernandez, E., Fukuda, Y., Gomez-Cadenas, J., Gran, R., Hara, T., Hasegawa, M., Hasegawa, T., Hayashi, K., Hayato, Y., Helmer, R.L., Hill, J., Hiraide, K., Hosaka, J., Ichikawa, A.K., Iinuma, M., Ikeda, A., Inagaki, T., Ishida, T., Ishihara, K., Ishii, T., Ishitsuka, M., Itow, Y., Iwashita, T., Jang, H.I., Jeon, E.J., Jeong, I.S., Joo, K., Jover, Gabriel V., Jung, C.K., Kajita, T., Kameda, J., Kaneyuki, K., Kato, I., Kearns, E., Kerr, D., Kim, C.O., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kim, J.Y., Kim, S., Kitching, P., Kobayashi, K., Kobayashi, T., Konaka, A., Koshio, Y., Kropp, W., Kubota, J., Kudenko, Yu., Kuno, Y., Kutter, T., Learned, J., Likhoded, S., Lim, I.T., Loverre, P.F., Ludovici, L., Maesaka, H., Mallet, J., Mariani, C., Maruyama, T., Matsuno, S., Matveev, V., Mauger, C., McConnel Mahn, Kendall Brianna, McGrew, C., Mikheyev, S., Minamino, A., Mine, S., Mineev, O., Mitsuda, C., Miura, M., Moriguchi, Y., Morita, T., Moriyama, S., Nakadaira, T., Nakahata, M., Nakamura, K., Nakano, I., Nakaya, T., Nakayama, S., Nambu, T., Nambu, R., Nawang, S., Nishikawa, K., Nitta, K., Nova, F., Novella, P., Obayashi, Y., Okada, A., Okumura, K., Oser, S.M., Oyama, Y., Pac, M.Y., Pierre, F., Rodriguez, A., Saji, C., Sakuda, M., Sanchez, F., Sarrat, A., Sasaki, T., Scholberg, K., Schroeter, R., Sekiguchi, M., Sharkey, E., Shiozawa, M., Shiraishi, K., Sitjes, G., Smy, M., Sobel, H., Stone, J., Sulak, L., Suzuki, A., Suzuki, Y., Takahashi, T., Takenaga, Y., Takeuchi, Y., Taki, K., Takubo, Y., Tamura, N., Tanaka, M., Terri, R., T'Jampens, S., Tornero-Lopez, A., Totsuka, Y., Ueda, S., Vagins, M., Walter, C.W., Wang, W., Wilkes, R.J., Yamada, S., Yamamoto, S., Yanagisawa, C., Yershov, N., Yokoyama, H., Yokoyama, M., Yoo, J., Yoshida, M., Zalipska, J.

    2005年03月04日, Phys.Rev.Lett., 94, 081802 - 081802, 英語

    [査読有り]

    研究論文(学術雑誌)

  • G Onengut, R van Dantzig, M de Jong, O Melzer, RGC Oldeman, E Pesen, JL Visschers, M Guler, U Kose, M Serin-Zeyrek, R Sever, P Tolun, MT Zeyrek, MG Catanesi, M De Serio, M Ieva, MT Muciaccia, E Radicioni, S Simone, A Bulte, K Winter, B Van de Vyver, P Vilain, G Wilquet, B Saitta, E Di Capua, S Ogawa, H Shibuya, A Artamonov, M Chizhov, M Doucet, IR Hristova, A Kayis-Topaksu, T Kawamura, D Kolev, H Meinhard, J Panman, IM Papadopoulos, S Ricciardi, A Rozanov, R Tsenov, JWE Uiterwijk, P Zucchelli, J Goldberg, M Chikawa, E Arik, JS Song, CS Yoon, K Kodama, N Ushida, S Aoki, T Hara, T Delbar, D Favart, G Gregoire, S Kalinin, Makhlioueva, I, P Gorbunov, Khovansky, V, Shamanov, V, Tsukerman, I, N Bruski, D Frekers, K Hoshino, J Kawada, M Komatsu, M Miyanishi, M Nakamura, T Nakano, K Narita, K Niu, K Niwa, N Nonaka, O Sato, T Toshito, S Buontempo, AG Cocco, N D'Ambrosio, G De Lellis, G De Rosa, F Di Capua, A Ereditato, G Fiorillo, A Marotta, M Messina, P Migliozzi, C Pistillo, LS Lavina, P Strolin, Tioukov, V, K Nakamura, T Okusawa, U Dore, PF Loverre, L Ludovici, P Righini, G Rosa, R Santacesaria, A Satta, FR Spada, E Barbuto, C Bozza, G Grella, G Romano, C Sirignano, S Sorrentino, Y Sato, Tezuka, I

    During the years 1994-1997, the emulsion target of the CHORUS detector was exposed to the wide-band neutrino beam of the CERN SPS. In total about 100 000 charged-current neutrino interactions were located in the nuclear emulsion target and fully reconstructed. From this sample of events which was based on the data acquired by new automatic scanning systems, 1048 Do events were selected by a pattern recognition program. They were confirmed as neutral-particle decays through visual inspection. Fragmentation properties of deep-inelastic charm production were measured using these events. Distributions of the DO momentum, Feynman x (x(F)), z and tantheta(out), the transverse angle out of the leptonic plane defined by the muon and the neutrino, are presented. The mean value of z was measured to be (z) = 0.63 +/- 0.03(stat) +/- 0.01(syst). From fits to the z distribution, values for the Peterson parameter epsilon(P) = 0.108 +/- 0.017(stat) +/- 0.013(syst) and the Collins-Spiller parameter epsilon(CS) = 0.21(-0.04)(+0.05) (stat) +/- 0.04(syst) are found. For the average value of x(F) we find (x(F)) = 0.38 +/- 0.04(stat) +/- 0.03(syst) and 4 for the forward-backward asymmetry A = 0.79 +/- 0.14(stat) +/- 0.05(syst). The distribution of tantheta(out) was measured with an average value (tantheta(out)) = 0.030 +/- 0.002. (C) 2004 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2004年12月, PHYSICS LETTERS B, 604 (3-4), 145 - 156, 英語

    [査読有り]

    研究論文(学術雑誌)

  • G Onengut, R van Dantzig, M de Jong, O Melzer, RGC Oldeman, E Pesen, JL Visschers, M Guler, U Kose, M Serin-Zeyrek, R Sever, P Tolun, MT Zeyrek, MG Catanesi, M De Serio, M Ieva, MT Muciaccia, E Radicioni, S Simone, A Bulte, K Winter, B Van de Vyver, P Vilain, G Wilquet, B Saitta, E Di Capua, S Ogawa, H Shibuya, A Artamonov, M Chizhov, M Doucet, IR Hristova, A Kayis-Topaksu, T Kawamura, D Kolev, H Meinhard, J Panman, IM Papadopoulos, S Ricciardi, A Rozanov, R Tsenov, JWE Uiterwijk, P Zucchelli, J Goldberg, M Chikawa, JS Song, CS Yoon, K Kodama, N Ushida, S Aoki, T Hara, T Delbar, D Favart, G Gregoire, S Kalinin, Makhlioueva, I, P Gorbunov, Khovansky, V, Shamanov, V, Tsukerman, I, N Bruski, D Frekers, K Hoshino, J Kawada, M Komatsu, M Miyanishi, M Nakamura, T Nakano, K Narita, K Niu, K Niwa, N Nonaka, O Sato, T Toshito, S Buontempo, AG Cocco, N D'Ambrosio, G De Lellis, G De Rosa, F Di Capua, A Ereditato, G Fiorillo, A Marotta, M Messina, P Migliozzi, C Pistillo, LS Lavina, P Strolin, Tioukov, V, K Nakamura, T Okusawa, U Dore, PF Loverre, L Ludovici, P Righini, G Rosa, R Santacesaria, A Satta, FR Spada, E Barbuto, C Bozza, G Grella, G Romano, C Sirignano, S Sorrentino, Y Sato, Tezuka, I

    During the years 1994-1997, the emulsion target of the CHORUS detector was exposed to the wide-band neutrino beam of the CERN SPS collecting about 10(6) neutrino interactions. A measurement of (ν) over bar (mu)-induced charm production is performed by using the presence of a 5% (ν) over bar (mu) component in the nu(mu) beam. The measurement takes advantage of the capability to observe the decay topology in the emulsion. The analysis is based on a sample of charged-current interactions with at least one identified muon. About 100 000 were located in the emulsion target and fully reconstructed. By requiring a positive muon charge as determined

    ELSEVIER SCIENCE BV, 2004年12月, PHYSICS LETTERS B, 604 (1-2), 11 - 21, 英語

    [査読有り]

    研究論文(学術雑誌)

  • A Kayis-Topaksu, G Onengut, R van Dantzig, M de Jong, J Konijn, O Melzer, RGC Oldeman, E Pesen, CAFJ van der Poel, JL Visschers, M Guler, U Kose, M Serin-Zeyrek, S Kama, R Sever, P Tolun, MT Zeyrek, MG Catanesi, M De Serio, M Ieva, MT Muciaccia, E Radicioni, S Simone, A Bulte, K Winter, B Van de Vyver, P Vilain, G Wilquet, B Saitta, E Di Capua, A Artamonov, J Brunner, M Chizhov, D Cussans, M Doucet, JP Fabre, IR Hristova, T Kawamura, D Kolev, M Litmaath, H Meinhard, J Panman, IM Papadopoulos, S Ricciardi, A Rozanov, D Saltzberg, R Tsenov, JWE Uiterwijk, P Zucchelli, J Goldberg, M Chikawa, E Arik, JS Song, CS Yoon, K Kodama, N Ushida, S Aoki, T Hara, T Delbar, D Favart, G Gregoire, S Kalinin, Makhlyoueva, I, P Gorbunov, Khovansky, V, Shamanov, V, Tsukerman, I, N Bruski, D Frekers, D Rondeshagen, T Wolff, K Hoshino, J Kawada, M Komatsu, M Miyanishi, M Nakamura, T Nakano, K Narita, K Niu, K Niwa, N Nonaka, O Sato, T Toshito, S Buontempo, AG Cocco, N D'Ambrosio, G De Lellis, G De Rosa, F Di Capua, A Ereditato, G Fiorillo, A Marotta, M Messina, P Migliozzi, C Pistillo, R Santorelli, LS Lavina, P Strolin, Tioukov, V, K Nakamura, T Okusawa, U Dore, R Loverre, L Ludovici, A Maslennikov, P Righini, G Rosa, R Santacesaria, A Satta, FR Spada, E Barbuto, C Bozza, G Grella, G Romano, C Sirignano, S Sorrentino, Y Sato, Tezuka, I

    This Letter reports on a study of trimuon events induced by neutrino interactions in the CHORUS calorimeter exposed to the CERN SPS wide-band v(mu) beam. Among the multimuon events produced in the calorimeter, 42 mu(-) mu(-) mu(+) events were selected and their kinematical properties investigated. In the past, several groups collected a sample of about one hundred events of this type but their source was largely unknown. Taking advantage of experimental data presently available on the production and muonic branching ratios of light neutral mesons and resonances, we make absolute predictions for the expected rates in our experiment. Detailed Monte Carlo simulations described in this article show that more than half of the trimuon events can be attributed to this source. Muons from pi- and K- decays in charm dimuon events are responsible for an additional approximate to 25% contribution to the total mu(-)mu(-)mu(+) rate. The remaining 25% of events are likely to come from the internal bremsstrahlung of virtual photons into a muon pair. Associated-charm production with subsequent decays of both charmed particles into muons is a negligible source of trimuon events. (C) 2004 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2004年08月, PHYSICS LETTERS B, 596 (1-2), 44 - 53, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Ahn, M.H., Aoki, S., Ashie, Y., Bhang, H., Boyd, S., Casper, D., Choi, J.H., Fukuda, S., Fukuda, Y., Gran, R., Hara, T., Hasegawa, M., Hasegawa, T., Hayashi, K., Hayato, Y., Hill, J., Ichikawa, A.K., Ikeda, A., Inagaki, T., Ishida, T., Ishii, T., Ishitsuka, M., Itow, Y., Iwashita, T., Jang, H.I., Jang, J.S., Jeon, E.J., Joo, K.K., Jung, C.K., Kajita, T., Kameda, J., Kaneyuki, K., Kato, I., Kearns, E., Kibayashi, A., Kielczewska, D., Kim, B.J., Kim, C.O., Kim, J.Y., Kim, S.B., Kobayashi, K., Kobayashi, T., Koshio, Y., Kropp, W.R., Learned, J.G., Lim, S.H., Lim, I.T., Maesaka, H., Maruyama, T., Matsuno, S., Mauger, C., Mcgrew, C., Minamino, A., Mine, S., Miura, M., Miyano, K., Morita, T., Moriyama, S., Nakahata, M., Nakamura, K., Nakano, I., Nakata, F., Nakaya, T., Nakayama, S., Namba, T., Nambu, R., Nishikawa, K., Nishiyama, S., Noda, S., Obayashi, Y., Okada, A., Oyama, Y., Pac, M.Y., Park, H., Saji, C., Sakuda, M., Sarrat, A., Sasaki, T., Sasao, N., Scholberg, K., Sekiguchi, M., Sharkey, E., Shiozawa, M., Shiraishi, K.K., Smy, M., Sobel, H.W., Stone, J.L., Suga, Y., Sulak, L.R., Suzuki, A., Suzuki, Y., Takeuchi, Y., Tamura, N., Tanaka, M., Totsuka, Y., Ueda, S., Vagins, M.R., Walter, C.W., Wang, W., Wilkes, R.J., Yamada, S., Yamamoto, S., Yanagisawa, C., Yokoyama, H., Yoo, J., Yoshida, M., Zalipska, J.

    2004年07月30日, Phys.Rev.Lett., 93, 051801 - 051801, 英語

    [査読有り]

    研究論文(学術雑誌)

  • K Kodama, C Andreopoulos, N Giokaris, N Saoulidou, G Tzanakos, B Baller, D Boehnlein, B Lundberg, R Rameika, JS Song, CS Yoon, SH Chung, P Berghaus, M Kubantsev, NW Reay, R Sidwell, N Stanton, S Yoshida, S Aoki, T Hara, D Ciampa, C Erickson, K Heller, R Rusack, M Graham, R Schwienhorst, J Sielaff, J Trammell, J Wilcox, K Hoshino, H Jiko, J Kawada, T Kawai, M Komatsu, H Matsuoka, M Miyanishi, M Nakamura, T Nakano, K Narita, K Niwa, N Nonaka, K Okada, O Sato, T Toshito, T Akdogan, A Kulik, Paolone, V, C Rosenfeld, T Kafka, W Oliver, J Schneps, M Skender

    The experimental apparatus used for the first direct observation of the tau neutrino (the DONUT experiment) is described. Its main features consisted of a target system composed of nuclear emulsion targets and scintillation fiber trackers, a magnetic charged-particle spectrometer and detectors for lepton identification. This paper will concentrate on the description of the electronic detectors and their performance in selecting neutrino interactions, making the vertex predictions necessary for locating events in the emulsion target and lepton identification. (C) 2003 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2004年01月, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 516 (1), 21 - 33, 英語

    [査読有り]

    研究論文(学術雑誌)

  • A Kayis-Topaksu, G Onengut, R van Dantzig, M de Jong, O Melzer, RGC Oldeman, E Pesen, FR Spada, JL Visschers, M Guler, U Kose, M Serin-Zeyrek, R Sever, P Tolun, MT Zeyrek, MG Catanesi, A De Serio, M Ieva, MT Muciaccia, E Radicioni, S Simone, A Bulte, K Winter, B Van de Vyver, P Vilain, G Wilquet, GL Pittoni, B Saitta, E Di Capua, S Ogawa, H Shibuya, A Artamonov, M Chizhov, M Doucet, IR Hristova, T Kawamura, D Kolev, H Meinhard, J Panman, IM Papadopoulos, S Ricciardi, A Rozanov, R Tsenov, JWE Uiterwijk, P Zucchelli, J Goldberg, M Chikawa, E Arik, JS Song, CS Yoon, K Kodama, N Ushida, S Aoki, T Hara, T Delbar, D Favart, G Gregoire, S Kalinin, Maklioueva, I, P Gorbunov, Khovansky, V, Shamanov, V, Tsukerman, I, N Bruski, D Frekers, K Hoshino, J Kawada, M Komatsu, M Miyanishi, M Nakamura, T Nakano, K Narita, K Niu, K Niwa, N Nonaka, O Sato, T Toshito, S Buontempo, AG Cocco, N D'Ambrosio, G De Lellis, G De Rosa, F Di Capua, A Ereditato, G Fiorillo, A Marotta, M Messina, P Migliozzi, C Pistillo, LS Lavina, P Strolin, Tioukov, V, K Nakamura, T Okusawa, U Dore, PF Loverre, L Ludovici, P Righini, G Rosa, R Santacesaria, A Satta, E Barbuto, C Bozza, G Grella, G Romano, C Sirignano, S Sorrentino, Y Sato, Tezuka, I

    A study of quasi-elastic production of charmed baryons in charged-current interactions of neutrinos with the nuclear emulsion target of CHORUS is presented. In a sample of about 46000 interactions located in the emulsion, candidates for decays of short-lived particles were identified by using new automatic scanning systems and later confirmed through visual inspection. Criteria based both on the topological and kinematical characteristics of quasi-elastic charm production allowed a clear separation between events of this type and those in which charm is produced in deep inelastic processes. A final sample containing 13 candidates consistent with quasi-elastic production of a charmed baryon with an estimated background of 1.7 events was obtained. At the average neutrino energy of 27 GeV the cross-section for the total quasi-elastic production of charmed baryons relative to the vN charged-current cross-section was measured to be sigma(QE)/sigma(CC) = (0.23(-0.06)(+0.12)(stat)(-0.03)(+0.02)(syst)) x 10(-2).

    ELSEVIER SCIENCE BV, 2003年11月, PHYSICS LETTERS B, 575 (3-4), 198 - 207, 英語

    [査読有り]

    研究論文(学術雑誌)

  • A Kayis-Topaksu, G Onengut, R van Dantzig, M de Jong, J Konijn, O Melzer, RGC Oldeman, E Pesen, CAFJ van der Poel, FR Spada, JL Visschers, M Guler, M Serin-Zeyrek, S Kama, R Sever, P Tolun, MT Zeyrek, N Armenise, MG Catanesi, M De Serio, M Ieva, MT Muciaccia, E Radicioni, S Simone, A Bulte, K Winter, R El-Aidi, B Van de Vyver, P Vilain, G Wilquet, B Saitta, E Di Capua, S Ogawa, H Shibuya, A Artamonov, J Brunner, M Chizhov, D Cussans, M Doucet, JP Fabre, IR Hristova, T Kawamura, D Kolev, M Litmaath, H Meinhard, J Panman, IM Papadopoulos, S Ricciardi, A Rozanov, D Saltzberg, R Tsenov, JWE Uiterwijk, P Zucchelli, J Goldberg, M Chikawa, E Arik, JS Song, CS Yoon, K Kodama, N Ushida, S Aoki, T Hara, T Delbar, D Favart, G Gregoire, S Kalinin, Makhlyoueva, I, P Gorbunov, Khovansky, V, Shamanov, V, Tsukerman, I, N Bruski, D Frekers, D Rondeshagen, T Wolff, K Hoshino, J Kawada, M Komatsu, M Miyanishi, M Nakamura, T Nakano, K Narita, K Niu, K Niwa, N Nonaka, O Sato, T Toshito, S Buontempo, AG Cocco, N D'Ambrosio, G De Lellis, G De Rosa, F Di Capua, A Ereditato, G Fiorillo, A Marotta, M Messina, P Migliozzi, C Pistillo, R Santorelli, LS Lavina, P Strolin, Tioukov, V, K Nakamura, T Okusawa, U Dore, PF Loverre, L Ludovici, A Maslennikov, P Righini, G Rosa, R Santacesaria, A Satta, E Barbuto, C Bozza, G Grella, G Romano, C Sirignano, S Sorrentino, Y Sato, Tezuka, I

    A relative measurement of total cross-sections is reported for polyethylene, marble, iron, and lead targets for the inclusive charged-current reaction nu(mu) + N --> mu- + X. The targets, passive blocks of similar to100 kg each, were exposed simultaneously to the CERN SPS wide-band muon-neutrino beam over a period of 18 weeks. Systematic effects due to differences in the neutrino flux and detector efficiency for the different target locations were minimised by changing the position of the four targets on their support about every two weeks. The relative neutrino fluxes on the targets were monitored within the same experiment using charged-current interactions in the calorimeter positioned directly downstream of the four targets. From a fit to the Z/A dependence of the total cross-sections a value is deduced for the effective neutron-to-proton cross-section ratio.

    SPRINGER-VERLAG, 2003年09月, EUROPEAN PHYSICAL JOURNAL C, 30 (2), 159 - 167, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Kayis-Topaksu A, Önengüt G, vanDantzig R, Aoki S, Hara T

    A measurement of Lambda(c)(+) production in neutrino nucleon charged-current interactions is presented. In a subsample of about 50 000 interactions located in the emulsion target of the CHORUS detector, exposed to the wide band neutrino beam of the CERN SPS, candidates for decays of short-lived particles were identified using new automatic scanning systems and later confirmed through visual inspection. Criteria based on the flight length allowed a statistical separation among the different charm species thus enabling a sample particularly rich in Lambda(c)(+) to be defined. At an average neutrino energy of 27 GeV, the product sigma(Lambda(c)(+))/sigma(CC) x BR(Lambda(c)(+) --> 3p) was measured to be (0.37 +/- 0.10(stat) +/- 0.02(syst)) x 10(-2), while the values of (1.54 +/- 0.35(stat) +/- 0.18(syst)) x 10(-2) and of 0.24 +/- 0.07(stat) +/- 0.04(syst) were obtained for sigma(Lambda(c)(+))/sigma(CC) and BR(Lambda(c)(+) --> 3p), respectively. (C) 2003 Elsevier Science B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2003年03月, Physics Letters B., 555 (3-4), 156 - 166, 英語

    [査読有り]

    研究論文(学術雑誌)

  • BJ Kim, T Iwashita, T Ishida, EJ Jeon, H Yokoyama, S Aoki, HG Berns, HC Bhang, S Boyd, K Fujii, T Hara, Y Hayato, J Hill, T Ishii, H Ishino, CK Jung, E Kearns, HI Kim, JH Kim, JY Kim, SB Kim, T Kobayashi, G Kume, S Matsuno, S Mine, K Nakamura, M Nakamura, K Nishikawa, M Onchi, T Otaki, Y Oyama, H Park, M Sakuda, K Sato, K Scholberg, E Sharkey, JL Stone, A Suzuki, K Takenaka, N Tamura, Y Tanaka, M Takatsuki, CW Walter, J Wilkes, J Yoo, M Yoshida

    The K2K long-baseline neutrino oscillation experiment uses a Scintillating Fiber Detector (SciFi) to reconstruct charged particles produced in neutrino interactions in the near detector. We describe the track reconstruction algorithm and the performance of the SciFi after 3 years of operation. (C) 2002 Elsevier Science B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2003年02月, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 497 (2-3), 450 - 466, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Indications of neutrino oscillation in a 250 km long-baseline experiment

    M. H. Ahn, S. Aoki, H. Bhang, S. Boyd, D. Casper, J. H. Choi, S. Fukuda, Y. Fukuda, W. Gajewski, T. Hara, M. Hasegawa, T. Hasegawa, Y. Hayato, J. Hill, A. K. Ichikawa, A. Ikeda, T. Inagaki, T. Ishida, T. Ishii, M. Ishitsuka, Y. Itow, T. Iwashita, H. I. Jang, J. S. Jang, E. J. Jeon, C. K. Jung, T. Kajita, J. Kameda, K. Kaneyuki, I. Kato, E. Kearns, A. Kibayashi, D. Kielczewska, K. Kobayashi, B. J. Kim, C. O. Kim, J. Y. Kim, S. B. Kim, T. Kobayashi, M. Kohama, Y. Koshio, W. R. Kropp, J. G. Learned, S. H. Lim, I. T. Lim, H. Maesaka, K. Martens, T. Maruyama, S. Matsuno, C. Mauger, C. Mcgrew, S. Mine, M. Miura, K. Miyano, S. Moriyama, M. Nakahata, K. Nakamura, I. Nakano, F. Nakata, T. Nakaya, S. Nakayama, T. Namba, K. Nishikawa, S. Nishiyama, S. Noda, A. Obayashi, A. Okada, T. Ooyabu, Y. Oyama, M. Y. Pac, H. Park, M. Sakuda, N. Sakurai, N. Sasao, K. Scholberg, E. Sharkey, M. Shiozawa, H. So, H. W. Sobel, A. Stachyra, J. L. Stone, Y. Suga, L. R. Sulak, A. Suzuki, Y. Suzuki, Y. Takeuchi, N. Tamura, T. Toshito, Y. Totsuka, M. R. Vagins, C. W. Walter, R. J. Wilkes, S. Yamada, S. Yamamoto, C. Yanagisawa, H. Yokoyama, J. Yoo, M. Yoshida, J. Zalipska

    A study was performed on Kamioka long-baseline neutrino oscillation experiment (K2K). The indications of neutrino oscillation such as a reduction of flux together with a distortion of the energy spectrum were observed in the experiment. In Super Kamiokande (SK), 250 km from the neutrino production point, fifty-six beam neutrino events were observed. It was found that the probability that the measurements at SK is explained by statistical fluctuation without neutrino oscillation is less than 1%.

    2003年01月31日, Physical Review Letters, 90 (4), 418011 - 418015

    [査読有り]

    研究論文(学術雑誌)

  • Ahn, M.H., Aoki, S., Bhang, H., Boyd, S., Casper, D., Choi, J.H., Fukuda, S., Fukuda, Y., Gajewski, W., Hara, T., Hasegawa, M., Hasegawa, T., Hayato, Y., Hill, J., Ichikawa, A.K., Ikeda, A., Inagaki, T., Ishida, T., Ishii, T., Ishitsuka, M., Itow, Y., Iwashita, T., Jang, H.I., Jang, J.S., Jeon, E.J., Jung, C.K., Kajita, T., Kameda, J., Kaneyuki, K., Kato, I., Kearns, E., Kibayashi, A., Kielczewska, D., Kobayashi, K., Kim, B.J., Kim, C.O., Kim, J.Y., Kim, S.B., Kobayashi, T., Kohama, M., Koshio, Y., Kropp, W.R., Learned, J.G., Lim, S.H., Lim, I.T., Maesaka, H., Martens, K., Maruyama, T., Matsuno, S., Mauger, C., Mcgrew, C., Mine, S., Miura, M., Miyano, K., Moriyama, S., Nakahata, M., Nakamura, K., Nakano, I., Nakata, F., Nakaya, T., Nakayama, S., Namba, T., Nishikawa, K., Nishiyama, S., Noda, S., Obayashi, A., Okada, A., Ooyabu, T., Oyama, Y., Pac, M.Y., Park, H., Sakuda, M., Sakurai, N., Sasao, N., Scholberg, K., Sharkey, E., Shiozawa, M., So, H., Sobel, H.W., Stachyra, A., Stone, J.L., Suga, Y., Sulak, L.R., Suzuki, A., Suzuki, Y., Takeuchi, Y., Tamura, N., Toshito, T., Totsuka, Y., Vagins, M.R., Walter, C.W., Wilkes, R.J., Yamada, S., Yamamoto, S., Yanagisawa, C., Yokoyama, H., Yoo, J., Yoshida, M., Zalipska, J.

    2003年01月31日, Phys.Rev.Lett., 90, 041801 - 041801, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Determination of the semi-leptonic branching fraction of charm hadrons produced in neutrino charged-current interactions

    A Kayis-Topaksu, G Onengut, M de Jong, O Melzer, RGC Oldeman, E Pesen, FR Spada, R van Dantzig, JL Visschers, M Guler, M Serin-Zeyrek, R Sever, P Tolun, MT Zeyrek, N Armenise, MG Catanesi, M De Serio, M Leva, MT Muciaccia, E Radicioni, S Simone, A Bulte, K Winter, R El-Aidi, B Van de Vyver, P Vilain, G Wilquet, B Saitta, E Di Capua, S Ogawa, H Shibuya, A Artamonov, M Chizhov, M Doucet, IR Hristova, T Kawamura, D Kolev, H Meinhard, J Panman, IM Papadopoulos, S Ricciardi, A Rozanov, R Tsenov, JWE Uiterwijk, P Zucchelli, J Goldberg, M Chikawa, E Arik, JS Song, CS Yoon, K Kodama, N Ushida, S Aoki, T Hara, T Delbar, D Favart, G Gregoire, S Kalinin, Maklioueva, I, P Gorbunov, Khovansky, V, Shamanov, V, Tsukerman, I, N Bruski, D Frekers, K Hoshino, M Komatsu, M Miyanishi, M Nakamura, T Nakano, K Narita, K Niu, K Niwa, N Nonaka, O Sato, T Toshito, S Buontempo, AG Cocco, N D'Ambrosio, G De Lellis, F Di Capua, G De Rosa, A Ereditato, G Fiorillo, M Messina, P Migliozzi, C Pistillo, LS Lavina, P Strolin, Tioukov, V, K Nakamura, T Okusawa, U Dore, PF Loverre, L Ludovici, P Righini, G Rosa, R Santacesaria, A Satta, E Barbuto, C Bozza, G Grella, G Romano, C Sirignano, S Sorrentino, Y Sato, Tezuka, I

    During the years 1994-1997, the emulsion target of the CHORUS detector was exposed to the CERN-SPS Wide Band Neutrino Beam. The improvements of the past few years in the automatic emulsion scanning systems allowed a sample of events located in emulsion to be used for studies of charm production. Based on a sample of 56 172nu(mu) charged-current interactions analysed so far, we find a value of B-mu = 0.093+/-0.009(stat.) +/-0.009(syst.) for the semi-leptonic branching fraction of charm hadrons. The result for events with visible energy larger than 30 GeV, B-mu = 0.102+/-0.016(stat.) +/-0.010(syst.), can be combined with the existing measurements of the dimuon rate to yield a value of 0.219+/-0.022 for the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element \V-cd\. (C) 2002 Elsevier Science B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2002年11月, PHYSICS LETTERS B, 549 (1-2), 48 - 57, 英語

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    研究論文(学術雑誌)

  • Detection and analysis of tau-neutrino interactions in DONUT emulsion target

    K Kodama, N Saoulidou, G Tzanakos, B Baller, B Lundberg, R Rameika, JS Song, CS Yoon, SH Chung, S Aoki, T Hara, C Erickson, K Heller, R Schwienhorst, J Sielaff, J Trammell, K Hoshino, H Jiko, J Kawada, T Kawai, M Komatsu, M Matsuoka, M Miyanishi, M Nakamura, T Nakano, K Narita, K Niwa, N Nonaka, K Okada, O Sato, T Toshito, Paolone, V, T Kafka

    The DONUT experiment used an emulsion/counter-hybrid-detector, which succeeded in detecting tau-neutrino charged-current interactions. A new method of emulsion analysis, NETSCAN, was used to locate neutrino events and detect tau decays. It is based on a fully automated emulsion readout system (Ultra Track Selector) developed at Nagoya University. The achieved plate-to-plate alignment accuracy of similar to0.2 mum over an area of 2.6 mm x 2.6 mm permitted an efficient and systematic tau decay search using emulsion data. Moreover, this accuracy allowed measurement of particle momenta by multiple Coulomb scattering, and contributed to the efficient background rejection for the v, candidates. This paper describes details of our emulsion analysis methods. (C) 2002 Elsevier Science B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2002年11月, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 493 (1-2), 45 - 66, 英語

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    研究論文(学術雑誌)

  • Shigeki Aoki

    SNO has begun a new era of measurements of Solar neutrinos, and the large mixing angle solutions seem to be favored. KamLAND has good chance to get a positive result. 7 Be neutrino detection by Borexino is also crucial. LSND's large Δm2 solutions are excluded. But its small Δm2 solutions are still possible, which will be covered by Mini-BooNE. From the atmospheric neutrino experiments, vμ → vτ is favored over vμ → vs. And DONUT confirmed that vτ does interact in the same manner as ve and vμ. The next step is getting clear evidence of oscillations by vτ appearance detection and high precision measurements of the oscillation parameter.

    2002年09月30日, International Journal of Modern Physics A, 17 (24), 3393 - 3402, 英語

    [査読有り]

    研究論文(国際会議プロシーディングス)

  • The large area emulsion tracker of the CHORUS experiment

    S Aoki, J Dupraz, JP Fabre, W Flegel, T Hara, Y Ishii, T Kawamura, DC Kim, T Kurihara, E Niu, S Ogawa, H Shibuya, JS Song, G Van Beek, P Vilain, J Watanabe, G Wilquet, CS Yoon

    A new type of tracking device using large area nuclear emulsion sheets was developed for the short baseline neutrino oscillation experiment, CERN-WA95/CHORUS. The emulsion tracker is made of three layers, each 25 mm thick including support, and covering an area of about 5 m(2). Two layers were installed upstream and one downstream of the hexagonal magnet of the CHORUS hadron spectrometer. The achieved position resolution over the whole area is 25 mum, which keeps the momentum resolution of the spectrometer below 30%, up to momenta of about 15 GeV/c. (C) 2002 Elsevier Science B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2002年08月, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 488 (1-2), 144 - 154, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Observation of one event with the characteristics of associated charm production in neutrino charged-current interactions

    A Kayis-Topaksu, G Onengut, R van Dantzig, M de Jong, J Konijn, O Melzer, RGC Oldeman, E Pesen, JL Visschers, M Guler, M Serin-Zeyrek, R Sever, P Tolun, MT Zeyrek, N Armenise, MG Catanesi, M De Serio, M Ieva, MT Muciaccia, E Radicioni, S Simone, A Bulte, K Winter, R El-Aidi, B Van de Vyver, P Vilain, G Wilquet, B Saitta, E Di Capua, S Ogawa, H Shibuya, A Artamonov, J Brunner, M Chizhov, D Cussans, M Doucet, IR Hristova, D Kolev, H Meinhard, J Panman, IM Papadopoulos, S Ricciardi, A Rozanov, R Tsenov, JWE Uiterwijk, P Zucchelli, J Goldberg, M Chikawa, E Arik, JS Song, CS Yoon, K Kodama, N Ushida, S Aoki, T Hara, T Delbar, D Favart, G Gregoire, S Kalinin, Maklioueva, I, P Gorbunov, Khovansky, V, Shamanov, V, Tsukerman, I, N Bruski, D Frekers, D Rondeshagen, T Wolff, K Hoshino, M Komatsu, M Miyanishi, M Nakamura, T Nakano, K Narita, K Niu, K Niwa, N Nonaka, O Sato, T Toshito, S Buontempo, AG Cocco, N D'Ambrosio, G De Lellis, G De Rosa, F Di Capua, A Ereditato, G Fiorillo, T Kawamura, M Messina, P Migliozzi, Palladino, V, P Strolin, Tioukov, V, K Nakamura, T Okusawa, U Dore, PF Loverre, L Ludovici, A Maslennikov, P Righini, G Rosa, R Santacesaria, A Satta, FR Spada, E Barbuto, C Bozza, G Grella, G Romano, S Sorrentino, Y Sato, Tezuka, I

    We report on a search for associated charm production in neutrino charged-current interactions in the CHORUS experiment, based on the visual observation of charmed-particle decays. The search differs from those carried out so far in which the production of c (c) over bar has been inferred from measurements of events with two or three nations in the final state, resulting from the decay of charmed hadrons. One event with a double charm-decay topology has been found and a corresponding background of 0.04 events has been evaluated. (C) 2002 Elsevier Science B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2002年07月, PHYSICS LETTERS B, 539 (3-4), 188 - 196, 英語

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    研究論文(学術雑誌)

  • Scintillating-fiber-block detector for studying double-strangeness nuclei

    H Takahashi, H Akikawa, S Aoki, A Ichikawa, M Ieiri, K Imai, H Kanda, Y Kondo, K Nakazawa, JT Rhee, J Tojo, K Yamamoto, T Yoshida

    Scintillating-fiber-block detectors have been constructed using 0.5 mm square fibers for the KEK-PS E373 experiment, which searches for double-strangeness nuclei. The main aim of the detector is to measure the energies of protons and pions produced from decay of double- or single-hypernuclei using their ranges. It is also used to detect A hyperons or the H-dibaryon, and to make event selection. The performance of the detectors was studied with low-energy proton and pion beams as well as minimum-ionizing particles. The energy resolution determined by the range measurements was 0.86 MeV for 37 MeV pi-'s and 1.4 MeV for 47 MeV protons. The excellent capability of pi/p separation has been also demonstrated. (C) 2002 Elsevier Science B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2002年05月, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 483 (3), 689 - 697, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Measurement of D-0 production in neutrino charged-current interactions

    A Kayis-Topaksu, G Onengut, R van Dantzig, M de Jong, O Melzer, RGC Oldeman, E Pesen, JL Visschers, M Guler, M Serin-Zeyrek, R Sever, P Tolun, MT Zeyrek, N Armenise, MG Catanesi, M De Serio, M Ieva, MT Muciaccia, E Radicioni, S Simone, A Bulte, K Winter, R El-Aidi, B Van de Vyver, P Vilain, G Wilquet, B Saitta, E Di Capua, S Ogawa, H Shibuya, A Artamonov, M Chizhov, M Doucet, D Kolev, H Meinhard, J Panman, IM Papadopoulos, S Ricciardi, A Rozanov, R Tsenov, JWE Uiterwijk, P Zucchelli, J Goldberg, M Chikawa, E Arik, JS Song, CS Yoon, K Kodama, N Ushida, S Aoki, T Hara, T Delbar, D Favart, G Greoire, S Kalinin, Maklioueva, I, P Gorbunov, Khovansky, V, Shamanov, V, Tsukerman, I, N Bruski, D Frekers, K Hoshino, M Komatsu, M Miyanishi, M Nakamura, T Nakano, K Narita, K Niu, K Niwa, N Nonaka, O Sato, T Toshito, S Buontempo, L Castagneto, AG Cocco, N D'Ambrosio, G De Lellis, F Di Capua, G De Rosa, A Ereditato, G Fiorillo, T Kawamura, M Messina, P Migliozzi, Palladino, V, P Strolin, Tioukov, V, K Nakamura, T Okusawa, U Dore, PF Loverre, L Ludovici, P Righini, G Rosa, R Santacesaria, A Satta, FR Spada, E Barbuto, C Bozza, G Grella, G Romano, C Sirignano, S Sorrentino, Y Sato, Tezuka, I

    During the years 1994-1997, the emulsion target of the CHORUS detector was exposed to the Wide Band Neutrino Beam from the CERN-SPS. About 170 000 neutrino interactions were successfully located in the emulsion. Improvements in the automatic emulsion scanning systems and application of different criteria allowed the sample of located events to be used for studies of charm production. We present a measurement of the production rate of Do mesons based on a sample of 25 693 located nu(mu) charged-current (CC) interactions analysed so far. After reconstruction of the event topology in the vertex region, 283 D-0 decays were observed with an estimated background of 9.2 K-0 and Lambda decays. The ratio of cross-section of D-0 production and nu(mu) CC interactions is found to be (1.99 +/- 0.13(stat.) +/- 0.17(syst.)) x 10(-2) at 27 GeV average nu(mu) energy. (C) 2002 Elsevier Science B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2002年02月, PHYSICS LETTERS B, 527 (3-4), 173 - 181, 英語

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    研究論文(学術雑誌)

  • Shigeki Aoki

    Tracking and vertex reconstruction in modern emulsion experiments was studied. Nuclear emulsion is an analog data storage device from which the automated scanning system retrives the data. The offline analysis methods were established for processing of huge amount of data from the automated scans. These systems are used in the analysis of the DONUT and CHORUS experiments. Nuclear emulsion as a tracking detector integrated tracks at different times.

    2001年11月01日, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 473 (1-2), 192 - 196, 英語

    [査読有り]

    研究論文(国際会議プロシーディングス)

  • Takahashi H, Ahn J.K, Akikawa H, Aoki S, Arai K

    A double-hyperfragment event has been found in a hybrid-emulsion experiment. It is identified uniquely as the sequential decay of He-6(Lambda Lambda) emitted from a Xi (-) hyperon nuclear capture at rest. ne mass of He-6(Lambda Lambda) and the Lambda-Lambda interaction energy DeltaB(Lambda Lambda) have been measured for the first time devoid of the ambiguities due to the possibilities of excited states. The value of DeltaB(Lambda Lambda) is 1-01 0.20(-0.11)(+0.18) mev. This demonstrates that the Lambda-Lambda interaction is weakly attractive.

    AMER PHYSICAL SOC, 2001年11月, Physical Review Letters, 87 (21), 英語

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    研究論文(学術雑誌)

  • Ahn, S.H, An, S, Aoki, S, Berns, H.G, Bhang, H.C, Boyd, S, Casper, D, Chikamatsu, T, Choi, J.H, Echigo, S, Etoh, M, Fujii, K, Fukuda, S, Fukuda, Y, Gajewski, W, Golebiewska, U, Hara, T, Hasegawa, T, Hayato, Y, Hill, J, Hong, S.J, Ieiri, M, Inada, T, Inagaki, T, Ishida, T, Ishii, H, Ishii, T, Ishino, H, Ishitsuka, M, Itow, Y, Iwashita, T, Jang, H.I, Jang, J.S, Jeon, E.J, Jeong, E.M, Jung, C.K, Kadowaki, T, Kajita, T, Kameda, J, Kaneyuki, K, Kato, I, Kato, Y, Kearns, E, Kenmochi, S, Khang, B.H, Kibayashi, A, Kielczewska, D, Kim, B.J, Kim, C.O, Kim, H.I, Kim, J.H, Kim, J.Y, Kim, S.B, Kishi, S, Kitamura, M, Kobayashi, K, Kobayashi, T, Kobayashi, Y, Kohama, M, Koo, D.G, Koshio, Y, Kropp, W, Kume, G, Kusano, E, Learned, J.G, Lee, H.K, Lee, J.W, Lee, S.B, Lim, I.T, Lim, S.H, Maesaka, H, Martens, K, Maruyama, T, Matsuno, S, Mauger, C, McGrew, C, Minakawa, M, Mine, S, Miura, M, Miyamoto, S, Miyano, K, Moriyama, S, Mukai, S, Nakahata, M, Nakamura, K, Nakamura, M, Nakano, I, Nakaya, T, Nakayama, S, Nakayoshi, K, Nishijima, K, Nishikawa, K, Nishiyama, S, Noda, S, Noumi, H, Obayashi, Y, Oh, J.K, Okada, A, Onchi, M, Otaki, T, Oyama, Y, Pac, M.Y, Park, H, Park, S.H, Park, S.K, Sakai, A, Sakuda, M, Sakurai, N, Sasao, N, Sato, K, Scholberg, K, Seo, E, Sharkey, E, Shiino, K, Shima, A, Shiozawa, M, So, H, Sobel, H, Stachyra, A, Stone, J.L, Sulak, L.R, Suzuki, A, Suzuki, Y, Suzuki, Y, Takasaki, M, Takatsuki, M, Takenaka, K, Takeuchi, H, Takeuchi, Y, Tamura, N, Tanaka, K.H, Tanaka, Y, Tashiro, K, Tauchi, K, Toshito, T, Totsuka, Y, Tumakov, V, Umeda, T, Vagins, M, Walter, C.W, Wilkes, R.J, Yamada, S, Yamaguchi, T, Yamanoi, Y, Yanagisawa, C, Yokoyama, H, Yokoyama, H, Yoo, J, Yoshida, M, You, S.Y

    2001年07月05日, Phys.Lett.B, 511, 178 - 184, 英語

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    研究論文(学術雑誌)

  • A new upper limit for the tau-neutrino magnetic moment

    R Schwienhorst, D Ciampa, C Erickson, M Graham, K Heller, R Rusack, J Sielaff, J Trammell, J Wilcox, K Kodama, N Ushida, C Andreopoulos, N Saoulidou, G Tzanakos, P Yager, B Baller, D Boehnlein, W Freeman, B Lundberg, J Morfin, R Rameika, JC Yun, JS Song, CS Yoon, SH Chung, P Berghaus, M Kubantsev, NW Reay, R Sidwell, N Stanton, S Yoshida, S Aoki, T Hara, JT Rhee, K Hoshino, H Jiko, M Miyanishi, M Komatsu, M Nakamura, T Nakano, K Niwa, N Nonaka, K Okada, O Sato, T Akdogan, Paolone, V, C Rosenfeld, A Kulik, T Kafka, W Oliver, T Patzak, J Schneps

    Using a neutrino beam in which a v(tau) component was identified for the first time, the vr magnetic moment was measured based on a search for an anomalous increase in the number of neutrino-electron interactions. One such event was observed when 2.3 were expected from background processes, giving an upper 90% confidence limit on mu (v tau) of 3.9 x 10(-7) mu (B) . (C) 2001 Published by Elsevier Science B.V.

    ELSEVIER SCIENCE BV, 2001年07月, PHYSICS LETTERS B, 513 (1-2), 23 - 29, 英語

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    研究論文(学術雑誌)

  • Observation of tau neutrino interactions

    K Kodama, N Ushida, C Andreopoulos, N Saoulidou, G Tzanakos, P Yager, B Baller, D Boehnlein, W Freeman, B Lundberg, J Morfin, R Rameika, JC Yun, JS Song, CS Yoon, SH Chung, P Berghaus, M Kubantsev, NW Reay, R Sidwell, N Stanton, S Yoshida, S Aoki, T Hara, JT Rhee, D Ciampa, C Erickson, M Graham, K Heller, R Rusack, R Schwienhorst, J Sielaff, J Trammell, J Wilcox, K Hoshino, H Jiko, M Miyanishi, M Komatsu, M Nakamura, T Nakano, K Niwa, N Nonaka, K Okada, O Sato, T Akdogan, Paolone, V, C Rosenfeld, A Kulik, T Kafka, W Oliver, T Patzak, J Schneps

    The DONUT experiment has analyzed 203 neutrino interactions recorded in nuclear emulsion targets. A decay search has found evidence of four tau neutrino interactions with an estimated background of 0.34 events. This number is consistent with the Standard Model expectation. (C) 2001 Published by Elsevier Science B.V.

    ELSEVIER SCIENCE BV, 2001年04月, PHYSICS LETTERS B, 504 (3), 218 - 224, 英語

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    研究論文(学術雑誌)

  • Observation of weak neutral current neutrino production of J/psi

    E Eskut, A Kayis-Topaksu, G Onengut, R van Dantzig, M de Jong, J Konijn, O Melzer, RGC Oldeman, E Pesen, CAFJ van der Poel, JWE Uiterwijk, JL Visschers, M Guler, M Serin-Zeyrek, R Sever, P Tolun, MT Zeyrek, N Armenise, F Cassol, MG Catanesi, R De Serio, MT Muciaccia, E Radicioni, S Simone, L Vivolo, A Bulte, K Winter, P Annis, R El-Aidi, M Vander Donckt, B Van de Vyver, P Vilain, G Wilquet, P Righini, B Saitta, E Di Capua, Y Ishii, T Kawamura, M Kazuno, S Ogawa, H Shibuya, J Brunner, M Chizhov, D Cussans, M Doucet, JP Fabre, W Flegel, M Litmaath, H Meinhard, E Niu, H Overas, J Panman, IM Papadopoulos, S Ricciardi, A Rozanov, D Saltzberg, P Strolin, R Tsenov, C Weinheimer, H Wong, P Zucchelli, J Goldberg, M Chikawa, E Arik, AA Mailov, IG Park, JS Song, CS Yoon, K Kodama, N Ushida, S Aoki, T Hara, G Brooijmans, D Favart, G Gregoire, J Herin, A Artamonov, P Gorbunov, Khovansky, V, Shamanov, V, Tsukerman, I, D Bonekamper, N D'Ambrosio, D Frekers, D Rondeshagen, T Wolff, K Hoshino, M Komatsu, Y Kotaka, T Kozaki, M Miyanishi, M Nakamura, T Nakano, K Niu, K Niwa, Y Obayashi, O Sato, T Toshito, N Bruski, S Buontempo, AG Cocco, G De Lellis, F Di Capua, A Ereditato, G Fiorillo, R Listone, M Messina, P Migliozzi, Palladino, V, Tioukov, V, K Nakamura, T Okusawa, A Capone, D De Pedis, S Di Liberto, U Dore, PF Loverre, L Ludovici, A Maslennikov, G Piredda, G Rosa, R Santacesaria, A Satta, FR Spada, E Barbuto, C Bozza, G Grella, G Romano, S Sorrentino, Y Sato, Tezuka, I

    Observation of J/psi production by neutrinos in the calorimeter of the CHORUS detector exposed to the CERN SPS wide-band nu (mu) beam is reported. A spectrum-averaged cross section sigma (J/psi) = (6.3 +/- 3.0) x 10(-41) cm(2) is obtained for 20 GeV less than or equal to E-nu less than or equal to 200 GeV. The data are compared with the theoretical model based on the QCD Z-gluon fusion mechanism. (C) 2001 Published by Elsevier Science B.V.

    ELSEVIER SCIENCE BV, 2001年03月, PHYSICS LETTERS B, 503 (1-2), 1 - 9, 英語

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    研究論文(学術雑誌)

  • Production of Twin Λ Hypernuclei from Ξ- Hyperon Capture at Rest.

    Ichikawa A, Ahn J.K, Akikawa H, Aoki S, Arai K

    A hybrid emulsion experiment was carried out to study double-strangeness nuclei produced via Xi (-) hyperon capture at rest with the expectation of ten times larger statistics than previous experiments. We have analyzed 5% of the total emulsion and found one "twin-hypernuclei" event involving the emission of two single-Lambda hypernuclei and a nuclear fragment from a Ehyperon stopping point. The event is interpreted as the decay of a Xi (-) + N-14 atomic system to He-5(Lambda) + He-5(Lambda) + He-4 + neutron. The species of the Xi (-)-atom and the fragmentation products are uniquely identified for the first time for twin-hypernuclei events. Combined with the results from a past hybrid-emulsion experiment, one double-Lambda hypernucleus and three twin-hypernuclei events have been found from Xi (-) captures on light emulsion nuclei. The ratio of the detected rate of double-Lambda hypernuclei to that of twin-hypernuclei is compared with theoretical estimates. (C) 2001 Elsevier Science B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2001年02月, Physics Letters B., 500 (1-2), 37 - 46, 英語

    [査読有り]

    研究論文(学術雑誌)

  • E. Eskut et al.

    A first analysis of the complete set of data collected by CHORUS in the years 1994-1997 is presented. The search for vτ charged current events has been performed for both leptonic and hadronic decays of the τ lepton. No τ candidate has been found. A vμ → vτ mixing is excluded down to sin22θμτ = 6.8 × 10-4 for large Δm2 (90% C.L.). © 2001 Elsevier Science B.V.

    2001年01月04日, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 497 (1-2), 8 - 22

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    研究論文(学術雑誌)

  • H-Dibaryon and Hypernucleus Formation in the Ξ--12C Reaction at Rest.

    Ahn J.K, Aoki S, Chung K.S, Chung M.S, En-yo H

    Stopped-Xi-C-12 reactions have been investigated with respect to H-dibaryon and hypernucleus formation with a scintillating fiber detector. Out of 5.5x10(3) tagged Xi (-) particles via the (K-,K+) reaction we obtained 72 stopping Xi (-) events with 6.7(-1.4)(+1.1) background events after imposing kinematic constraints. Hypernuclear production has been studied by observing free Lambda decays in the stopped-Xi (-) reactions. From the observed Lambda momentum spectrum, we have found the hypernuclear production rates to he 18+/-13, 65+/-6, and 17+/-12 % for double/twin-Lambda hypernucleus, single-Lambda hypernucleus, and no hypernucleus cases, respectively. With the same sample, we set upper limits on R (stopped-Xi C-12-->HX/stopped-Xi (-) C-12--> all) for H decaying into Lambdan, Sigma (-) p, and Lambdap pi (-), for H masses just below Lambda Lambda mass threshold and for H lifetime range 10(-11) less than or equal to tau (H) less than or equal to 10(-8) s. The upper limits on R are similar to0.1-0.2, assuming all of the H decay into each decay mode. Our results give a tight constraint on the existence of the bound H, in comparison with the theoretical estimates of Aerts and Dover, albeit with different target nuclei.

    AMERICAN PHYSICAL SOC, 2000年11月, Physical Review C., 62 (5), 英語

    [査読有り]

    研究論文(学術雑誌)

  • Nuclear Emulsion in a Large Hybrid Experiment (CHORUS) to Search for νμ→ντ Oscillations.

    Aoki S, Barbuto E, Bozza C, Fabre J.P, Hara T

    We describe the (2 x 800 kg) emulsion target in the CHORUS hybrid detector set-up for the search of nu(mu) --> nu(tau) oscillations. together with the CERN pouring and processing facilities (upgraded for this purpose), and the techniques employed to treat the emulsions used as the active target in the experiment. (C) 2000 Elsevier Science B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2000年06月, Nuclear Instruments and Methods A., 447 (3), 361 - 376, 英語

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    研究論文(学術雑誌)

  • J. K. Ahn, S. Aoki, K. S. Chung, M. S. Chung, H. En’yo, T. Fukuda, H. Funahashi, Y. Goto, A. Higashi, M. Ieiri, T. Iijima, M. Iinuma, K. Imai, Y. Itow, J. M. Lee, S. Makino, A. Masaike, Y. Matsuda, Y. Matsuyama, S. Mihara, C. Nagoshi, I. Nomura, I. S. Park, N. Saito, M. Sekimoto, Y. M. Shin, K. S. Sim, R. Susukita, R. Takashima, F. Takeutchi, P. Tlustý, S. Weibe, S. Yokkaichi, K. Yoshida, M. Yoshida, T. Yoshida, S. Yamashita

    Stopped-[Formula Presented] reactions have been investigated with respect to H-dibaryon and hypernucleus formation with a scintillating fiber detector. Out of [Formula Presented] tagged [Formula Presented] particles via the [Formula Presented] reaction we obtained 72 stopping [Formula Presented] events with [Formula Presented] background events after imposing kinematic constraints. Hypernuclear production has been studied by observing free Λ decays in the stopped-[Formula Presented] reactions. From the observed Λ momentum spectrum, we have found the hypernuclear production rates to be [Formula Presented] and [Formula Presented] for double/twin-Λ hypernucleus, single-Λ hypernucleus, and no hypernucleus cases, respectively. With the same sample, we set upper limits on R (stopped-[Formula Presented] stopped-[Formula Presented] all) for [Formula Presented] decaying into [Formula Presented] and [Formula Presented] for [Formula Presented] masses just below [Formula Presented] mass threshold and for [Formula Presented] lifetime range [Formula Presented] The upper limits on [Formula Presented] are [Formula Presented] assuming all of the [Formula Presented] decay into each decay mode. Our results give a tight constraint on the existence of the bound [Formula Presented] in comparison with the theoretical estimates of Aerts and Dover, albeit with different target nuclei. © 2000 The American Physical Society.

    2000年, Physical Review C - Nuclear Physics, 62 (5), 12, 英語

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    研究論文(学術雑誌)

  • Quasifree p(K-, K+)Ξ- Reaction in Nuclear Emulsion.

    Aoki S, Asai S, Bahk S.Y, Chung S.H, Hara T

    A study of 1.66 GeV/c K- beam induced (K-,K+) reactions in the nuclear emulsion target is presented and 796 (K-, K+) reaction vertices (p(K+) greater than or equal to 1 GeV/c) containing 18 single hyperfragments are identified. There is no clear(spatially separated) double hyperfragment nor twin single hyperfragment in the identified 796 (K-,K+) reactions. These events are classified and their characteristics are described in detail. In the region p(K+)greater than or equal to 1 GeV/c where the quasifree K-(p) --> K(+)Xi(-) is the dominant process, the probability of Xi(-) emission from the reaction vertex is determined to be 73.9(-4.6)(+4.5)%. From this value, the mean free path of Xi(-) in a nucleus is estimated to be 4.7(-1.0)(+1.5) fm for [p(Xi-)] similar to 0.6 GeV/c by assuming a simple model of uniform nuclear matter. (C) 1998 Elsevier Science B.V.

    ELSEVIER SCIENCE BV, 1998年12月, Nuclear Physics A., 644 (4), 365 - 385, 英語

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    研究論文(学術雑誌)

  • Enhanced ΛΛ Production Near Threshold in the 12C(K-, K+) Reaction.

    Ahn J.K, Aoki S, Chung K.S, Chung M.S, En-yo H

    Enhanced production of nn pairs, above levels predicted by a two-step process model, has been observed near threshold (in the mass range 2.23-2.26 GeV/c(2)) in the C-12(K-,K+) reaction at 1.66 GeV/c using a scintillating fiber target. The differential cross section for nn production in the momentum region 0.95 less than or equal to p(kappa+)less than or equal to l 1.3 GeV/c averaged over the range 2.3 degrees less than or equal to theta(kappa+)less than or equal to 14.7 degrees was found to be 7.6 +/- 1.3 +/- 0.9 mu b/sr, and that for the enhancement was found to be approximately 3 mu b/sr. (C) 1998 Elsevier Science B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 1998年12月, Physics Letters B., 444 (3-4), 267 - 272, 英語

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    研究論文(学術雑誌)

  • Scintillating microfibers as a high-resolution tracking detector for hybrid-emulsion experiment

    A Ichikawa, S Aoki, K Imai, M Kaneko, Y Kondo, K Nakazawa, H Tanaka, K Yamamoto, T Yoshida

    We have developed a very thin and high precision tracking detector using a coherent bundle of plastic scintillating microfibers for an emulsion-counter hybrid experiment to search for double-strangeness nuclei. The purpose of this detector is to measure the position and angle of short-lived particles, such as low-momentum Xi(-) particles produced in (K-, K+) reactions. The dependence of the light yield and attenuation length of fibers on the density of the wavelength shifter and the fiber diameter have been studied. A test experiment with a prototype fiber detector and emulsion has been carried out using 0.5 GeV/c protons. The tracks tagged by the fiber detector were identified in the emulsion. By comparing the position and the angle of tracks predicted by the detector with the measurements of the tagged tracks in the emulsion, positions were determined with an r.m.s precision of 113 mu m and angles were determined with an r.m.s precision of 25 mrad with a very thin detector of about 4 mm thickness. (C) 1998 Elsevier Science B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 1998年11月, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 417 (2-3), 220 - 229, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Observation of Neutrino Induced Diffractive Ds*+ Production and Subsequent Decay Ds*+ → Ds+ → τ+ → μ+

    Annis P, Aoki S, Artamonov A, Barbuto E, Hara T

    We report on the first direct observation of a neutrino induced charged-current interaction with two subsequent decays of short-lived particles close to the interaction vertex. This rare double-kink signature in the CHORUS emulsion target is interpreted as a D-s*(+) production followed by the decay chain D-s*(+) --> D-s(+) gamma, D-s(+) --> tau(+) v(tau),tau(+) --> mu(+) v(mu)v(tau). The event is characterised by small Q(2) and small four-momentum transfer squared t to the target nucleon, which indicates a diffractive production mechanism. A complete analysis of the event is presented. (C) 1998 Elsevier Science B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 1998年09月, Physics Letters B., 435 (3-4), 458 - 464, 英語

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    研究論文(学術雑誌)

  • Search for νμ→ντ Oscillation Using the t Decay Modes into a Single Charged Particle.

    Eskut E, Kayis A, Önengüt G, Aoki S, Hara T

    Part of the neutrino events collected in 1994-1995 by the CHORUS experiment has been analysed. A search was performed for nu(tau) charged current interactions followed by the tau lepton decay into a single charged negative hadron, a possible indication for nu(mu) --> nu(tau) oscillation. A sample of 6844 events without an identified muon has been located in the emulsion target. Within the selection criteria, no tau(-) candidate has been found. Combining this result with the one from the search fur nu(tau) interactions using the muonic decay mode (36182 events with an identified muon), a 90% C.L. limit on the mixing angle sin(2)2 theta(mu tau) < 1.8.10(-3) (at large Delta m(2)) has been derived. (C) 1998 Published by Elsevier Science B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 1998年08月, Physics Letters B., 434 (1-2), 205 - 213, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Cascade hypernuclei in the (K-,K+) reaction on C-12

    T Fukuda, A Higashi, Y Matsuyama, C Nagoshi, J Nakano, M Sekimoto, P Tlusty, JK Ahn, H En'yo, H Funahashi, Y Goto, M Iinuma, K Imai, Y Itow, S Makino, A Masaike, Y Matsuda, S Mihara, N Saito, R Susukita, S Yokkaichi, K Yoshida, M Yoshida, S Yamashita, R Takashima, F Takeutchi, S Aoki, M Ieiri, T Iijima, T Yoshida, Nomura, I, T Motoba, YM Shin, S Weibe, MS Chung, IS Park, KS Sim, KS Chung, JM Lee

    Cascade hypernuclei have been studied in the (K-,K+) reaction on a scintillating fiber target. The experimental result is compared with a theoretical calculation in order to extract information concerning the E- nucleus potential.

    AMERICAN PHYSICAL SOC, 1998年08月, PHYSICAL REVIEW C, 58 (2), 1306 - 1309, 英語

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    研究論文(学術雑誌)

  • The CHORUS scintillating fiber tracker and opto-electronic readout system

    P Annis, S Aoki, G Brooijmans, J Brunner, J Dupraz, J Dupont, JP Fabre, D Favart, W Flegel, D Frekers, G Gregoire, M Gruwe, J Herin, K Hoepfner, M Kobayashi, J Konijn, T Kozaki, P Lamonte, Lemaitre, V, P Lendermann, D Macina, RM Drees, L Michel, C Mommaert, K Nakamura, M Nakamura, T Nakano, P Nappey, K Niwa, E Niu, J Panman, R Pintus, F Riccardi, S Reynaud, D Rondeshagen, O Sato, G Stefanini, G Van Beek, M Vander Donckt, P Vilain, C Weinheimer, G Wilquet, K Winter, HT Wong

    A scintillating fiber tracker system consisting of more than one million fibers has been successfully constructed and made operational for the CERN WA95/CHORUS experiment. The design and construction of the tracker system as well as its opto-electronic readout are described. The performance of the detector with high-energy muons is presented. (C) 1998 Elsevier Science B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 1998年07月, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 412 (1), 19 - 37, 英語

    [査読有り]

    研究論文(学術雑誌)

  • A Search for νμ→ντ Oscillation.

    Eskut E, Kayis A, Önengüt G, Aoki S, Hara T

    CHORUS is an experiment searching for nu(mu) --> nu(tau) oscillation in the CERN wide band neutrino beam with a hybrid setup consisting of a nuclear emulsion target followed by electronic detectors. The experiment has been taking data from 1994 through 1997. A subset of the neutrino interactions collected in 1994 and 1995 have been analyzed, looking for nu(tau) charged current interactions where the tau lepton decays to mu<(nu)over bar>(mu)nu(tau). In a sample of 31,423 nu(mu) charged current interactions, no nu(tau) candidates were found. For large Delta m(mu tau)(2) values, a limit on the mixing angle of sin(2)2 theta(mu tau) < 3.5 x 10(-3) at 90% C.L. can be set, thus improving the previous best result. (C) 1998 Elsevier Science B.V.

    ELSEVIER SCIENCE BV, 1998年04月, Physics Letters B., 424 (1-2), 202 - 212, 英語

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    研究論文(学術雑誌)

  • The CHORUS Experiment to Search for νμ→ντ Oscillation.

    Eskut E, Kayis A, Önengüt G, Aoki S, Hara T

    A new experimental apparatus, designed principally for a high sensitivity search for nu(<mu)> --> mu(tau) oscillation, has been successfully constructed and made operational by the CHORUS Collaboration for the CERN-WA95 experiment. It consists of a large emulsion target, a scintillating fiber tracker system with optoelectronics read-out, an air-core magnet, a set of trigger hodoscopes, a calorimeter based on the lead/scintillating-fiber technique, and a muon spectrometer. The design, construction and performance of the entire apparatus and of the different detectors are described.

    ELSEVIER SCIENCE BV, 1997年12月, Nuclear Instruments and Methods A., 401 (1), 7 - 44, 英語

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    研究論文(学術雑誌)

  • Scalar and vector meson production and two-step processes in the (K-,K+) reaction on C-12

    JK Ahn, S Aoki, KS Chung, MS Chung, H Enyo, T Fukuda, H Funahashi, Y Goto, A Higashi, M Ieiri, T Iijima, M Iinuma, K Imai, Y Itow, JM Lee, S Makino, A Masaike, Y Matsuda, Y Matsuyama, S Mihara, C Nagoshi, Nomura, I, IS Park, N Saito, M Sekimoto, YM Shin, KS Sim, R Susukita, R Takashima, F Takeutchi, P Tlusty, S Weibe, S Yokkaichi, K Yoshida, M Yoshida, T Yoshida, S Yamashita

    The double strangeness exchange reaction (K-, Kf) is investigated with respect to the subthreshold production of scalar and vector mesons (f(0)/a(0)/phi) decaying into K+K- and the two-step processes induced by intermediate mesons and Xi- hyperons at p(K-)= 1.66 GeV/c using a scintillating fiber active target. The differential cross section (< d sigma/d Omega(L) >) averaged over the angular interval (2.3(0) less than or equal to theta(K+)(L) less than or equal to 14.7(0)) for the sub-threshold f(0)/a(0)/phi meson production with the K+K- decay is 11 +/- 6 mu b/sr at 0.6 less than or equal to p(K+) < 0.95 GeV/c. The present result differs significantly from the theoretical calculation which predicts the contribution of the f(0)/a(0)/phi meson production to be predominant in the (K-, K+) reaction below p(K+) = 0.95 GeV/c. We found a sizable contribution from two-step (K-, K+) processes, characterized by production of two S = -1 hyperons, consistent with the result of the intra-nuclear cascade (INC) model calculation with respect to the meson-induced hyperon (or hyperon resonance) pair production in the momentum region 0.6 less than or equal to p(K+) < 0.95 GeV/c. The observed enhancement of the cross section for the two-step Lambda Lambda production beyond the prediction of the INC model at p(K+) similar or equal to 1.1 GeV/c could be due to the Xi(-) p --> Lambda Lambda reaction in C-12. (C) 1997 Published by Elsevier Science B.V.

    ELSEVIER SCIENCE BV, 1997年10月, NUCLEAR PHYSICS A, 625 (1-2), 231 - 250, 英語

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    研究論文(学術雑誌)

  • Enhanced production of Lambda Lambda pairs near threshold in (K-, K+) reaction

    JK Ahn, S Aoki, KS Chung, MS Chung, H En'yo, T Fukuda, H Funahashi, Y Goto, A Higashi, M Ieiri, T Iijima, M Iinuma, K Imai, Y Itow, JM Lee, S Makino, A Masaike, Y Matsuda, Y Matsuyama, S Mihara, C Nagoshi, Nomura, I, IS Park, N Saito, M Sekimoto, YM Shin, KS Sim, R Susukita, R Takashima, F Takeutchi, P Tlusty, S Weibe, S Yokkaichi, K Yoshida, M Yoshida, T Yoshida, S Yamashita

    Enhanced production of Lambda Lambda pairs are observed very near the threshold (around the mass of 2.24 GeV/c(2)) beyond prediction of a two-step process model in (K-, K+) reaction at p(K-) = 1.66 GeV/c using the scintillating fiber target. The differential cross section for the Lambda Lambda production averaged over 2.3 degrees less than or equal to theta(K+) less than or equal to 14.7 degrees in the momentum region 0.95 less than or equal to p(K+) less than or equal to 1.3 GeV/c was found to be 8.2 +/- 1.3 mu b/sr, and that for the enhancement approximately 3 mu b/sr.

    AMER INST PHYSICS, 1997年, INTERSECTIONS BETWEEN PARTICLE AND NUCLEAR PHYSICS - 6TH CONFERENCE, (412), 923 - 926, 英語

    [査読有り]

    研究論文(国際会議プロシーディングス)

  • K. Kodama, S. Torikai, N. Ushida, A. Mokhtarani, V. S. Paolone, J. T. Volk, J. O. Wilcox, P. M. Yager, R. M. Edelstein, A. P. Freyberger, D. B. Gibaut, R. J. Lipton, W. R. Nichols, D. M. Potter, J. S. Russ, C. Zhang, Y. Zhang, H. I. Jang, J. Y. Kim, B. R. Baller, R. J. Stefanski, K. Nakazawa, S. H. Chung, M. S. Park, I. G. Park, J. S. Song, C. S. Yoon, M. Aryal, N. W. Reay, R. A. Sidwell, N. R. Stanton, S. Yoshida, M. Chikawa, T. Hara, S. Aoki, K. Hoshino, M. Kobayashi, M. Komatsu, M. Miyanishi, M. Nakamura, S. Nakanishi, K. Niwa, M. Nomura, K. Okada, H. Tajima, K. Teraoka, J. M. Dunlea, S. G. Frederiksen, S. Kuramata, B. G. Lundberg, G. A. Oleynik, K. Reibel, G. R. Kalbfleisch, P. Skubic, J. M. Snow, S. E. Willis, K. Nakamura, T. Okusawa, T. Yoshida, H. Okabe, J. Yokota, N. Ihara, M. Kazuno, T. Koya, E. Niu, S. Ogawa, H. Shibuya, S. Watanabe, N. Yasuda, K. Ehara, K. Horie, Y. Sato, K. Suzuki, I. Tezuka

    We have observed 23.2 ± 6.0+1.0 -0.9 purely-leptonic decays of D+ S → μ+νμ from a sample of muonic one prong decay events detected in the emulsion target of Fermilab experiment E653. Using the D+ S → φμ+νμ yield measured previously in this experiment, we obtain B(D+ S → μ+νμ)/B(D+ S → φμ+νμ) = 0.16 ± 0.06 ± 0.03. In addition, we extract the decay constant fDS = 194 ± 35 ± 20 ± 14 MeV.

    Elsevier, 1996年08月08日, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 382 (3), 299 - 304, 英語

    [査読有り]

    研究論文(学術雑誌)

  • J. K. Ahn, S. Aoki, K. S. Chung, M. S. Chung, H. En'yo, T. Fukuda, H. Funahashi, Y. Goto, A. Higashi, M. Ieiri, T. Iijima, M. Iinuma, K. Imai, Y. Itow, J. M. Lee, S. Makino, A. Masaike, Y. Matsuda, Y. Matsuyama, S. Mihara, C. Nagoshi, I. Nomura, I. S. Park, N. Saito, M. Sekimoto, Y. M. Shin, K. S. Sim, R. Susukita, R. Takashima, F. Takeutchi, P. Tlustý, S. Weibe, S. Yokkaichi, K. Yoshida, M. Yoshida, T. Yoshida, S. Yamashita

    We have studied (K-,K+) reactions at PK- = 1.66 GeV/c by using a newly developed active target made of plastic scintillating fibers. The H dibaryon (S = -2,I(Jπ) = 0(0+)) has been searched for through the direct process. K-+C→ K+ + H + X, by the analysis of the K+ momentum spectrum with the help of visual data of the scintillating fiber target. No evidence for the H production was observed. Upper limits for the differential cross section for the H production in the forward direction of the K+ is 0.04-0.6 μb/sr at the 90% confidence level for the H mass range from 1850 to 2215 MeV/c2.

    Elsevier, 1996年06月20日, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 378 (1-4), 53 - 58, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Performance and calibration of the CHORUS scintillating fiber tracker and opto-electronics readout system

    P Annis, S Aoki, G Brooijmans, J Brunner, M deJong, JP Fabre, R Ferreira, W Flegel, D Frekers, G Gregoire, M Gruwe, J Herin, K Hoepfner, M Kobayashi, J Konijn, Lemaitre, V, P Lendermann, D Macina, RM Drees, H Meinhard, L Michel, C Mommaert, K Nakamura, M Nakamura, T Nakano, K Niwa, E Niu, J Panman, F Riccardi, D Rondeshagen, O Sato, G Stefanini, M VanderDonckt, P Vilain, G Wilquet, K Winter, HT Wong

    An essential component of the CERN WA95/CHORUS experiment is a scintillating fiber tracker system for precise track reconstruction of particles. The tracker design, its opto-electronics readout and calibration system are discussed, Performances of the detector are presented.

    ELSEVIER SCIENCE BV, 1995年12月, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 367 (1-3), 367 - 371, 英語

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    研究論文(学術雑誌)

  • CHARGED-PARTICLE MULTIPLICITY AND TRANSVERSE ENERGY MEASURED IN S-32 CENTRAL INTERACTIONS AT 200 GEV PER NUCLEON

    S AOKI, BISI, V, AC BRESLIN, F CASSOL, MG CATANESI, DH DAVIS, A DI BARTOLOMEO, S DILIBERTO, MJ ESTEN, P GIUBELLINO, G GRELLA, K HOSHINO, M KAZUNO, M KOBAYASHI, K KODAMA, S LUSSO, A MARZARICHIESA, M MASERA, F MEDDI, M MIYANISHI, MT MUCIACCIA, S NAKANISHI, K NAKAZAWA, K NIU, K NIWA, M NOMURA, G POULARD, L RAMELLO, L RICCATI, G ROMANO, G ROSA, MS SARTORI, C SGARBI, H SHIBUYA, S SIMONE, H TAJIMA, DN TOVEE, N USHIDA, T VIRGILI

    Interactions induced by 200 GeV per nucleon S-32 ions on heavy targets were selected by the HELIOS calorimeters and studied in nuclear emulsions. Global observables, such as charged particle multiplicity and transverse energy, were determined event-by-event. Multiplicity and transverse energy were measured as a function of the pseudorapidity over the large acceptance of the present experiment (0.6 less than or equal to eta less than or equal to 5.5). A comparison of the experimental data with those provided by the event generators FRITIOF and VENUS shows remarkable differences both in the target spectator region and in the participant region. An attempt is made to interpret these discrepancies in terms of plausible mechanisms, like baryon-pair production or rescattering.

    EDITRICE COMPOSITORI BOLOGNA, 1995年09月, NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA A-NUCLEI PARTICLES AND FIELDS, 108 (9), 1125 - 1141, 英語

    [査読有り]

    研究論文(学術雑誌)

  • S. Aoki, S.Y. Bahk, K.S. Chung, S.U. Chung, H. Funahashi, C.H. Hahn, T. Hara, S. Hirata, K. Hoshino, M. Ieiri, T. Ijima, K. Imai, Y. Itow, T. Jin-ya, M. Kazuno, K. Kikuchi, C.O. Kim, D.C. Kim, J.Y. Kim, K. Kodama, Y. Maeda, A. Masaike, A. Masuoka, Y. Matsuda, C. Nagoshi, M. Nakamura, S. Nakanishi, T. Nakano, K. Nakazawa, K. Niwa, H. Oda, S. Ogawa, S.H. Oh, H. Okabe, R. Ozaki, I.G. Park, M.S. Park, Y. Sato, H. Shibuya, H.M. Shimizu, Y.B. Sim, J.S. Song, M. Sugimoto, H. Tajima, R. Takashima, F. Takeutchi, K.H. Tanaka, R. Tanaka, M. Teranaka, I. Tezuka, H. Togawa, N. Ushida, T. Watanabe, N. Yasuda, J. Yokota, C.S. Yoon

    An event accompanied by two single hyperfragments emitted from a Xi(-) nuclear capture at rest was found in a nuclear emulsion. It is interpreted as a Xi(-)-C-12 bound system decaying into either a)(Lambda)H-4 + Be-9(Lambda), b) H-4(Lambda) + Be-9(Lambda)* or c) H-4(Lambda)* + Be-9(Lambda). The binding energy of the Xi-C-12 system is obtained as a/) 3.70(-0.19)+(0.18) MeV, b) 0.62(-0.19)(+0.1)8 MeV and c) 2.66(-0.19)(+0.18) MeV, respectively. The system is considered as a Xi- hypernucleus in the cases a) and c). In case b), this event and another event of the same type (Yokohama event) can both be interpreted as a decay from the Xi-C-12 system in 2P state when a shallow Xi(-)-nulcear potential is assumed.

    ELSEVIER SCIENCE BV, 1995年07月, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 355 (1-2), 45 - 51, 英語

    [査読有り]

    研究論文(学術雑誌)

  • K KODAMA, N USHIDA, A MOKHTARANI, VS PAOLONE, JT VOLK, JO WILCOX, PM YAGER, RM EDELSTEIN, AP FREYBERGER, DB GIBAUT, RJ LIPTON, WR NICHOLS, DM POTTER, JS RUSS, C ZHANG, Y ZHANG, HI JANG, JY KIM, TI KIM, IT LIM, MY PAC, BR BALLER, RJ STEFANSKI, K NAKAZAWA, KS CHUNG, SH CHUNG, DC KIM, IG PARK, MS PARK, JS SONG, CS YOON, M ARYAL, NW REAY, RA SIDWELL, NR STANTON, M CHIKAWA, T ABE, T FUJII, G FUJIOKA, H FUKUSHIMA, T HARA, Y TAKAHASHI, K TARUMA, Y TSUZUKI, K FUJIWARA, C YOKOYAMA, SD CHANG, BG CHEON, JH CHO, JS KANG, CO KIM, KY KIM, TY KIM, JC LEE, SB LEE, GY LIM, SW NAM, TS SHIN, KS SIM, JK WOO, Y ISOKANE, Y TSUNEOKA, S AOKI, A GAUTHIER, K HOSHINO, H KITAMURA, M KOBAYASHI, M KOMATSU, M MIYANISHI, K NAKAMURA, M NAKAMURA, Y NAKAMURA, S NAKANISKI, K NIU, K NIWA, M NOMURA, K OKADA, H TAJIMA, T TOSHITOU, S YOSHIDA, JM DUNLEA, SG FREDERIKSEN, S KURAMATA, BG LUNDBERG, GA OLEYNIK, K REIBEL, K MORIYAMA, H SHIBATA, GR KALBFLEISCH, P SKUBIC, JM SNOW, SE WILLIS, O KUSUMOTO, K NAKAMURA, T OKUSAWA, M TERANAKA, T TOMINAGA, T YOSHIDA, H YUUKI, H OKABE, J YOKOTA, M KAZUNO, T KOYA, E NIU, S OGAWA, H SHIBUYA, S WATANABE, N YASUDA, M KAMIYA, Y SATO, TEZUKA, I, M YAMAKI, SY BAHK, SK KIM

    A search for charm hadron decays into two muons plus one or more hadrons has been carried out using a hybrid emulsion spectrometer. This technique is sensitive to modes with missing neutrals, e.g. pi(0) mu(+)mu(-) and rho(+/-)mu(+)mu(-), as well as to constrained modes having visible invariant masses equal to those of charm states. No evidence for any such decays has been found, which allows upper limits at the 90% confidence level as low as 1.8 x 10(-4) to be placed on the branching fractions for charm-changing neutral-current and lepton-number violating decay modes.

    ELSEVIER SCIENCE BV, 1995年02月, PHYSICS LETTERS B, 345 (1), 85 - 92, 英語

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    研究論文(学術雑誌)

  • The chorus scintillating fiber tracker and opto-electronics readout system

    P ANNIS, S AOKI, G BROOIJMANS, J BRUNNER, M DEJONG, JP FABRE, R FERREIRA, W FLEGEL, D FREKERS, G GREGOIRE, M GRUWE, J HERIN, K HOEPFNER, M KOBAYASHI, J KONIJN, LEMAITRE, V, P LENDERMANN, D MACINA, RM DREES, H MEINHARD, L MICHEL, C MOMMAERT, K NAKAMURA, M NAKAMURA, T NAKANO, K NIWA, E NIU, J PANMAN, F RICCARDI, D RONDESHAGEN, O SATO, G STEFANINI, M VANDERDONCKT, P VILAIN, C WEINHEIMER, G WILQUET, K WINTER, HT WONG

    SPIE - INT SOC OPTICAL ENGINEERING, 1995年, PHOTOELECTRONIC DETECTORS, CAMERAS, AND SYSTEMS, 2551, 28 - 39, 英語

    [査読有り]

    研究論文(国際会議プロシーディングス)

  • H-dibaryon search with a scintillating fiber live target

    JK AHN, S AOKI, KS CHUNG, MS CHUNG, H ENYO, T FUKUDA, H FUNAHASHI, Y GOTO, A HIGASHI, M IEIRI, T IIJIMA, M IINUMA, K IMAI, Y ITOW, JM LEE, S MAKINO, A MASAIKE, Y MATSUDA, Y MATSUYAMA, S MIHARA, T NAKANO, C NAGOSHI, K NIWA, NOMURA, I, IS PARK, YM PARK, N SAITO, M SEKIMOTO, YM SHIN, KS SIM, R SUSUKITA, R TAKASHIMA, F TAKEUTCHI, P TLUSTY, S WEIBE, S YOKKAICHI, K YOSHIDA, M YOSHIDA, T YOSHIDA, S YAMASHITA

    AIP PRESS, 1995年, INTERSECTIONS BETWEEN PARTICLE AND NUCLEAR PHYSICS, (338), 526 - 532, 英語

    [査読有り]

    研究論文(国際会議プロシーディングス)

  • JK AHN, S AOKI, KS CHUNG, MS CHUNG, H ENYO, T FUKUDA, H FUNAHASHI, Y GOTO, A HIGASHI, M IEIRI, T IIJIMA, M IINUMA, K IMAI, Y ITOW, JM LEE, C NAGOSHI, NOMURA, I, S MAKINO, A MASAIKE, Y MATSUDA, Y MATSUYAMA, S MIHARA, K OMATA, IS PARK, N SAITO, M SEKIMOTO, YM SHIN, KS SIM, R SUSUKITA, R TAKASHIMA, F TAKEUTCHI, P TLUSTY, S WEIBE, S YOKKAICHI, S YAMASHITA, K YOSHIDA, M YOSHIDA, T YOSHIDA

    The H dibaryon search experiment using a scintillating-fiber target was performed at KEK-PS. The preliminary results are reported. No evidence of the H production via C(K-, K+) reaction has been found. The upper limit of the ratio of the H production to the quasi-free process, K- + (p)-->K(+)E(-) is 0.06-0.6% for M(H) less than or equal to 2200 MeV/c(2). For 2200 MeV/c(2) less than or equal to M(H) less than or equal to 2230 MeV/c(2), the upper limit for the production of the H which decays into Sigma(-) + p is 0.06-07%.

    EDITRICE COMPOSITORI BOLOGNA, 1994年11月, NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA A-NUCLEI PARTICLES AND FIELDS, 107 (11), 2415 - 2420, 英語

    [査読有り]

    研究論文(学術雑誌)

  • K. Kodama, N. Ushida, A. Mokhtarani, V. S. Paolone, J. T. Volk, J. O. Wilcox, P. M. Yager, R. M. Edelstein, A. P. Freyberger, D. B. Gibaut, R. J. Lipton, W. R. Nichols, D. M. Potter, J. S. Russ, C. Zhang, Y. Zhang, H. I. Jang, J. Y. Kim, T. I. Kim, I. T. Lim, M. Y. Pac, B. R. Baller, R. J. Stefanski, K. Nakazawa, K. S. Chung, S. H. Chung, D. C. Kim, I. G. Park, M. S. Park, J. S. Song, C. S. Yoon, M. Aryal, N. W. Reay, R. A. Sidwell, N. R. Stanton, M. Chikawa, T. Abe, T. Fujii, G. Fujioka, K. Fujiwara, H. Fukushima, T. Hara, Y. Takahashi, K. Taruma, Y. Tsuzuki, C. Yokoyama, S. D. Chang, B. G. Cheon, J. H. Cho, J. S. Kang, C. O. Kim, K. Y. Kim, T. Y. Kim, J. C. Lee, S. B. Lee, G. Y. Lim, S. W. Nam, T. S. Shin, K. S. Sim, J. K. Woo, Y. Isokane, Y. Tsuneoka, S. Aoki, A. Gauthier, K. Hoshino, H. Kitamura, M. Kobayashi, M. Miyanishi, K. Nakamura, M. Nakamura, Y. Nakamura, S. Nakanishi, K. Niu, K. Niwa, M. Nomura, H. Tajima, S. Yoshida, J. M. Dunlea, S. G. Frederiksen, S. Kuramata, B. G. Lundberg, G. A. Oleynik, R. Reibel, K. Moriyama, H. Shibata, G. R. Kalbfleisch, P. Skubic, J. M. Snow, S. E. Willis, O. Kusumoto, T. Okusawa, M. Teranaka, T. Tominaga, T. Yoshida, H. Yuuki, H. Okabe, J. Yokota, M. Kazuno, T. Koya

    The relative branching fraction RK = Γ(D0 → K-μ+v)/Γ(D0 → μ-X) has been measured by Fermilab experiment E653, using D0 mesons produced by 600 GeV π-. The semimuonic decay sample of 232 events was identified by the decay chain D*+ → D0π+, D0 → μ+h-X, where h is a hadron. The Kμv component was extracted from the joint distribution of these events in the D0 decay variables Mmin and pTh. We find RK = 0.472 ± 0.051 (stat) ± 0.040 (sys), and use a world average of the D0 → Klv branching fraction to obtain the D0 inclusive semimuonic branching fraction B(D0 → μ+X) = (7.67 ± 1.13)%. © 1994.

    ELSEVIER SCIENCE BV, 1994年09月, Physics Letters B, 336 (3-4), 605 - 613, 英語

    [査読有り]

    研究論文(学術雑誌)

  • SCINTILLATING-FIBER TRACKERS WITH OPTOELECTRONIC READOUT FOR THE CHORUS NEUTRINO EXPERIMENT

    S AOKI, J DUPONT, J DUPRAZ, JP FABRE, W FLEGEL, D FREKERS, B FRIEND, G GREGOIRE, M GRUWE, H HEYNITZ, K HILLER, K HOPFNER, J KONIJN, LEMAITRE, V, P LENDERMANN, RM DREES, L MICHEL, C MOMMAERT, M NAKAMURA, P NAPPEY, K NIWA, J PANMAN, R PINTUS, S REYNAUD, F RICCARDI, G STEFANINI, G VANBEEK, P VILAIN, JL VISSCHERS, G WILQUET, K WINTER, HT WONG

    The CERN WA95/CHORUS collaboration has been constructing a hybrid detector to search for (nu(mu)-nu(tau))-oscillations. An essential component of the detector is a scintillating fiber tracking system for precise track reconstruction of particles. The physics motivation is explained, and the detector layout, the tracker design, its optoelectronic readout and test beam results are presented.

    ELSEVIER SCIENCE BV, 1994年04月, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 344 (1), 143 - 148, 英語

    [査読有り]

    研究論文(学術雑誌)

  • KEK-E224 Collaboration, J. K. Ahn, S. Aoki, K. S. Chung, M. S. Chung, H. En’yo, T. Fukuda, H. Funahashi, Y. Goto, A. Higashi, M. Ieiri, T. Iijima, M. Iinuma, K. Imai, Y. Itow, J. M. Lee, C. Nagoshi, I. Nomura, S. Makino, A. Masaike, Y. Matsuda, Y. Matsuyama, S. Mihara, K. Omata, I. S. Park, N. Saito, M. Sekimoto, Y. M. Shin, K. S. Sim, R. Susukita, R. Takashima, F. Takeutchi, P. Tlusty, S. Weibe, S. Yokkaichi, S. Yamashita, K. Yoshida, M. Yoshida, T. Yoshida

    The H dibaryon search experiment using a scintillating-fiber target was performed at KEK-PS. The preliminary results are reported. No evidence of the H production via C(K−, K+) reaction has been found. The upper limit of the ratio of the H production to the quasi-free process, K−+(p)→K++Ξ− is 0.05–0.6% for MH⩽2200 MeV/c2. For 2200 MeV/c2⩽MH⩽2230 MeV/c2, the upper limit for the production of the H which decays into Σ−+p is 0.6–07%. © 1994, Società Italiana di Fisica. All rights reserved.

    1994年, Il Nuovo Cimento A Series 11, 107 (11), 2415 - 2420, 英語

    [査読有り]

    研究論文(学術雑誌)

  • K. Kodama, N. Ushida, A. Mokhtarani, V. S. Paolone, J. T. Volk, J. O. Wilcox, P. M. Yager, R. M. Edelstein, A. P. Freyberger, D. B. Gibaut, R. J. Lipton, W. R. Nichols, D. M. Potter, J. S. Russ, C. Zhang, Y. Zhang, H. I. Jang, J. Y. Kim, T. I. Kim, I. T. Lim, M. Y. Pac, B. R. Baller, R. J. Stefanski, K. Nakazawa, K. S. Chung, S. H. Chung, D. C. Kim, I. G. Park, M. S. Park, J. S. Song, C. S. Yoon, S. Kuramata, M. Chikawa, S. Aoki, T. Hara, Y. Takahashi, K. Taruma, S. D. Chang, D. G. Cheon, J. H. Cho, J. S. Kang, C. O. Kim, K. Y. Kim, T. Y. Kim, J. C. Lee, S. B. Lee, G. Y. Lim, S. W. Nam, T. S. Shin, K. S. Sim, J. K. Woo, A. Gauthier, K. Hoshino, S. Ishikawa, T. Kawai, H. Kitamura, K. Kobayashi, M. Miyanishi, K. Nakamura, M. Nakamura, Y. Nakamura, S. Nakanishi, K. Niwa, M. Nomura, H. Sasaki, H. Tajima, Y. Tomita, S. Yoshida, M. Aryal, J. M. Dunlea, S. G. Frederiksen, B. G. Lundberg, G. A. Oleynik, N. W. Reay, K. Reibel, R. A. Sidwell, N. R. Stanton, G. R. Kalbfleisch, P. Skubic, J. M. Snow, S. E. Willis, K. Nakamura, S. Ohashi, T. Okusawa, M. Teranaka, T. Tominaga, T. Yoshida, H. Okabe, J. Yokota, M. Adachi, S. Ikegami, M. Kazuno, T. Koya, E. Niu, H. Shibuya, S. Watanabe, Y. Sato, I. Tezuka, S. Y. Bahk, S. K. Kim

    A new method, called graphic scanning, was developed by the Nagoya University Group for emulsion analysis in a hybrid experiment. This method enhances both speed and reliability of emulsion analysis. Details of the application of this technique to the analysis of Fermilab experiment E653 are described. © 1994.

    1994年, Nuclear Inst. and Methods in Physics Research, B, 93 (3), 340 - 354, 英語

    [査読有り]

    研究論文(学術雑誌)

  • K. Kodama, N. Ushida, A. Mokhtarani, V. S. Paolone, J. T. Volk, J. O. Wilcox, P. M. Yager, R. M. Edelstein, A. P. Freyberger, D. B. Gibaut, R. J. Lipton, W. R. Nichols, D. M. Potter, J. C. Russ, C. Zhang, Y. Zhang, H. I. Jang, J. Y. Kim, T. I. Kim, I. T. Lim, M. Y. Pac, B. R. Baller, R. J. Stefanski, K. Nakazawa, K. S. Chung, S. H. Chung, D. C. Kim, I. G. Park, M. S. Park, J. S. Song, C. S. Yoon, M. Chikawa, T. Abe, S. Aoki, T. Fujii, G. Fujioka, K. Fujiwara, H. Fukushima, T. Hara, Y. Takahashi, K. Taruma, Y. Tsuzuki, C. Yokoyama, S. D. Chang, B. G. Cheon, J. H. Cho, J. S. Kang, C. O. Kim, K. Y. Kim, T. Y. Kim, J. C. Lee, S. B. Lee, G. Y. Lim, S. W. Nam, T. S. Shin, K. S. Sim, J. K. Woo, Y. Isokane, Y. Tsuneoka, A. Gauthier, K. Hoshino, H. Kitamura, M. Kobayashi, M. Komatsu, M. Miyanishi, K. Nakamura, M. Nakamura, Y. Nakamura, S. Nakanishi, K. Niu, K. Niwa, M. Nomura, K. Okada, H. Tajima, T. Toshitou, S. Yoshida, M. Aryal, J. M. Dunlea, S. G. Frederiksen, S. Kuramata, B. G. Lundberg, G. A. Oleynik, N. W. Reay, K. Reibel, R. A. Sidwell, N. R. Stanton, K. Moriyama, H. Shibata, G. R. Kalbfleisch, P. Skubic, J. M. Smow, S. E. Willis, O. Kusumoto, S. Ohashi, T. Okusawa, M. Teranaka, T. Tominaga, T. Yoshida, H. Yuuki

    We report the first observation of the Cabibo disfavored semileptonic decay mode D+ → ρ(770)0 μ+v and measure its decay rate relative to the Cabibbo favored mode D+ → K ̄* (892)0 μ+v to be Λ(D+ → ρ(770)0 μ+v Λ(D+ → K ̄* (892)0 μ+v) = 0.0440.031 -0.025(stat.) ± 0.014 (syst.). The results are compared to theoretical predictions and to previous experimental upper limits. © 1993.

    1993年10月21日, Physics Letters B, 316 (2-3), 455 - 462, 英語

    [査読有り]

    研究論文(学術雑誌)

  • K. Kodama, N. Ushida, A. Mokhtarani, V. S. Paolone, J. T. Volk, J. O. Wilcox, P. M. Yager, R. M. Edelstein, A. P. Freyberger, D. B. Gibaut, R. J. Lipton, W. R. Nichols, D. M. Potter, J. S. Russ, J. J. Smetanka, C. Zhang, Y. Zhang, H. I. Jang, J. Y. Kim, T. I. Kim, I. T. Lim, M. Y. Pac, B. R. Baller, R. J. Stefanski, K. Nakazawa, K. S. Chung, S. H. Chung, S. H. Chung, D. C. Kim, I. G. Park, M. S. Park, J. S. Song, C. S. Yoon, M. Chikawa, T. Abe, T. Fujii, G. Fujioka, K. Fujiwara, H. Fukushima, T. Hara, Y. Takahashi, K. Taruma, Y. Tsuzuki, C. Yokoyama, S. D. Chang, B. G. Cheon, J. H. Cho, J. S. Kang, C. O. Kim, K. Y. Kim, T. Y. Kim, J. C. Lee, S. B. Lee, G. Y. Lim, S. W. Nam, T. S. Shin, K. S. Sim, J. K. Woo, Y. Isokane, Y. Tsuneoka, S. Aoki, A. Gauthier, K. Hoshino, H. Kitamura, M. Kobayashi, M. Miyanishi, K. Nakamura, M. Nakamura, Y. Nakamura, S. Nakanishi, K. Niu, K. Niwa, M. Nomura, H. Tajima, S. Yoshida, M. Aryal, J. M. Dunlea, S. G. Frederiksen, S. Kuramata, B. G. Lundberg, G. A. Oleynik, N. W. Reay, K. Reibel, R. A. Sidwell, N. R. Stanton, K. Moriyama, H. Shibata, G. R. Kalbfleisch, P. Skubic, J. M. Snow, S. E. Willis, O. Kusumoto, K. Nakamura, T. Okusawa, M. Teranaka, T. Tominaga, T. Yoshida, H. Yuuki, H. Okabe, J. Yokota, M. Adachi, I. Ikegami, M. Kazuno, E. Niu, H. Shibuya, S. Watanabe, Y. Sato, M. Seshimo, I. Tezuka, S. Y. Bahk, S. K. Kim

    A search for charm production in the coherent diffractive dissociation reaction pSi→XSi was carried out for the modes D0→K-π+, D0→K-π+π+π-, and D+→K-π+π+. No charm signals were observed, and the 90% confidence level upper limit for coherent charm pair production was determined to be 26 μb per silicon nucleus. The results are interpreted as an upper limit of 0.2% on the amount of intrinsic charm in the proton. © 1993.

    1993年10月14日, Physics Letters B, 316 (1), 188 - 196, 英語

    [査読有り]

    研究論文(学術雑誌)

  • K. Kodama, N. Ushida, A. Mokhtarani, V. S. Paolone, J. T. Volk, J. O. Wilcox, P. M. Yager, R. M. Edelstein, A. P. Freyberger, D. B. Gibaut, R. J. Lipton, W. R. Nichols, D. M. Potter, J. S. Russ, C. Zhang, Y. Zhang, H. I. Jang, J. Y. Kim, T. I. Kim, I. T. Lim, M. Y. Pac, B. R. Baller, R. J. Stefanski, K. Nakazawa, K. S. Chung, S. H. Chung, D. C. Kim, I. G. Park, M. S. Park, J. S. Song, C. S. Yoon, M. Chikawa, T. Abe, T. Fujii, G. Fujioka, K. Fujiwara, H. Fukushima, T. Hara, Y. Takahashi, K. Taruma, Y. Tsuzuki, C. Yokoyama, S. D. Chang, B. G. Cheon, J. H. Cho, J. S. Kang, C. O. Kim, K. Y. Kim, T. Y. Kim, J. C. Lee, S. B. Lee, G. Y. Lim, S. W. Nam, T. S. Shin, K. S. Sim, J. K. Woo, Y. Isokane, Y. Tsuneoka, S. Aoki, A. Gauthier, K. Hoshino, H. Kitamura, M. Kobayashi, T. Kozaki, M. Miyanishi, K. Nakamura, M. Nakamura, Y. Nakamura, S. Nakanishi, K. Niu, K. Niwa, M. Nomura, H. Tajima, S. Yoshida, M. Aryal, J. M. Dunlea, S. G. Frederiksen, S. Kuramata, B. G. Lundberg, G. A. Oleynik, N. W. Reay, K. Reibel, R. A. Sidwell, N. R. Stanton, K. Moriyama, H. Shibata, G. R. Kalbfleisch, P. Skubic, J. M. Snow, S. E. Willis, O. Kusumoto, K. Nakamura, T. Okusawa, M. Teranaka, T. Tominaga, T. Yoshida, H. Yuuki, H. Okabe, J. Yokota, M. Adachi, I. Ikegami, M. Kazuno, E. Niu, H. Shibuya, S. Watanabe, Y. Sato, M. Seshimo, I. Tezuka, S. Y. Bahk, S. K. Kim

    Upper limits at the 90% confidence level are presented for four- and five-prong semimuonic decays of charm mesons. From a study of four-prong vertices we find B(D0 → K-π+π-μ+ν)/B(D0 → K-μ+ν) < 0.037 and B (D0 → (K* (892)π)-μ+ν)/B(D0 → K-μ+ν) < 0.043. The five-prong vertices yield the result B(DS + → η′μ+ν) / B(DS + → φμ+ν) < 1.6. © 1993.

    1993年08月26日, Physics Letters B, 313 (1-2), 260 - 266, 英語

    [査読有り]

    研究論文(学術雑誌)

  • K. Kodama, N. ushida, A. Mokhtarani, V. S. Paolone, J. T. Volk, J. O. Wilcox, P. M. Yager, R. M. Edelstein, A. P. Freyberger, D. B. Gibaut, R. J. Lipton, W. R. Nichols, D. M. Potter, J. S. Russ, C. Zhang, Y. Zhang, H. I. Jang, J. Y. Kim, T. I. Kim, I. T. Lim, M. Y. Pac, B. R. Baller, R. J. Stefanski, K. Nakazawa, K. S. Chung, S. H. Chung, D. C. Kim, I. G. Park, M. S. Park, J. S. Song, C. S. Yoon, M. Chikawa, T. Abe, T. Fujii, G. Fujioka, K. Fujiwara, H. Fukushima, T. Hara, Y. Takahashi, K. Taruma, Y. Tsuzuki, C. Yokoyama, S. D. Chang, B. G. Cheon, J. H. Cho, J. S. Kang, C. O. Kim, K. Y. Kim, T. Y. Kim, J. C. Lee, S. B. Lee, G. Y. Lim, S. W. Nam, T. S. Shin, K. S. Sim, J. K. Woo, Y. Isokane, Y. Tsuneoka, S. Aoki, A. Gauthier, K. Hoshino, H. Kitamura, M. Kobayashi, M. Miyanishi, K. Nakamura, M. Nakamura, Y. Nakamura, S. Nakanishi, K. Niu, K. Niwa, M. Nomura, H. Tajima, S. Yoshida, M. Aryal, J. M. Dunlea, S. G. Frederiksen, S. Kuramata, B. G. Lundberg, G. A. Oleynik, N. W. Reay, K. Reibel, R. A. Sidwell, N. R. Stanton, K. Moriyama, H. Shibata, G. R. Kalbfleisch, P. Skubic, J. M. Snow, S. E. Willis, O. Kusumoto, K. Nakamura, S. Ohashi, T. Okusawa, M. Teranaka, T. Tominaga, T. Yoshida, H. Yuuki, H. Okabe, J. Yokota, M. Adachi, I. Ikegami, M. Kazuno, E. Niu, H. Shibuya, S. Watanabe, Y. Sato, M. Seshimo, I. Tezuka, S. Y. Bahk, S. K. Kim

    We present a study of the Cabibbo-allowed semimuonic decay modes of the DS + produced in 600 GeV c π- -emulsion interactions. From a signal of 18.7±4.9-0.7 +0.4 events in the DS + → øμ+υ channel, the product of production cross section and partial width is measured with respect to that for D+ → K*0 μ+υ to be ( σ(DS +) σ(D+)). (Λ(DS + → øμ+ν)Λ(D+ → K*0 μ+ν)) = 0.56 ± 0.14 ± 0.12. The form factor ratios in the decay, obtained by fitting to the decay angles and q2, are A2 (0) 1(0) = 2.1-0.5 +0.6 ± 0.2 and V (0) A1 (0) = 2.3-0.9 +1.1 ± 0.4, where A1 (0) and A2 (0) are the axial vector form factors and V(0) is the vector form factor, evaluated at q2 = 0. The first observation of DS + → (ημ+υ + η'μ+υ) is also reported, and Γ (DS + → (ημ+υ + η'μ+υ)) Γ (DS + → øμ+υ) is determined to be 3.9 ± 1.6. © 1993.

    1993年07月15日, Physics Letters B, 309 (3-4), 483 - 491, 英語

    [査読有り]

    研究論文(学術雑誌)

  • K. Kodama, N. Ushida, A. Mokhtarani, V. S. Paolone, J. T. Volk, J. O. Wilcox, P. M. Yager, R. M. Edelstein, A. P. Freyberger, D. B. Gibaut, R. J. Lipton, W. R. Nichols, D. M. Potter, J. S. Russ, C. Zhang, Y. Zhang, H. I. Jang, J. Y. Kim, T. I. Kim, I. T. Lim, M. Y. Pac, B. R. Baller, R. J. Stefanski, K. Nakazawa, K. S. Chung, S. H. Chung, D. C. Kim, I. G. Park, M. S. Park, J. S. Song, C. S. Yoon, M. Chikawa, T. Abe, T. Fujii, K. Fujiwara, H. Fukushima, T. Hara, Y. Takahashi, K. Taruma, Y. Tsuzuki, C. Yokoyama, S. D. Chang, B. G. Cheon, J. H. Cho, J. S. Kang, C. O. Kim, K. Y. Kim, T. Y. Kim, J. C. Lee, S. B. Lee, G. Y. Lim, S. W. Nam, T. S. Shin, K. S. Sim, J. K. Woo, Y. Isokane, Y. Tsuneoka, S. Aoki, A. Gauthier, K. Hoshino, H. Kitamura, M. Kobayashi, M. Miyanashi, K. Nakamura, Y. Nakamura, S. Nakanishi, K. Niu, K. Niwa, M. Nomura, H. Tajima, S. Yoshida, M. Aryal, J. M. Dunlea, S. G. Frederiksen, S. Kuramata, B. G. Lundberg, G. A. Olevnik, N. W. Reay, K. Reibel, R. A. Sidwell, N. R. Stanton, K. Moriyama, H. Shibata, G. R. Kalbfleisch, P. Skubic, J. M. Snow, S. E. Willis, O. Kusumoto, T. Okusawa, M. Teranaka, T. Tominaga, T. Yoshida, H. Yuuki, H. Okabe, J. Yokota, M. Adachi, M. Kazuno, E. Niu, H. Shibuya

    We report on the production characteristics and total cross section for 9 beauty hadron pairs produced by a 600 GeV/c π- beam, the first such information in this energy region. The events were detected in the hybrid emulsion spectrometer of Fermilab Experiment E653. The measured pair cross section for all χF, assuming linear A dependence, is 33±11 (stat.)±6(syst.) nb/nucleon. Fits of the inclusive single-hadron production distribution to the forms dσ dχF ∝ (1-|χF-χ0|)n and dσ dpT 2 ∝ exp(-bpt 2) give n=5.0-2.1-1.7 +2.7+1.7, χ0=0.06-0.07-0.03 +0.06+0.02, and b=0.13-0.04-0.02 +0.05+0.02 (GeV/c-2. .The pairs tend to be produced back-to-back. © 1993.

    1993年04月15日, Physics Letters B, 303 (3-4), 359 - 367, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Measurement of the Lifetimes of Charged and Neutral Beauty Hadrons

    K. Kodama et al.

    1993年03月, Prog. Theor. Phys., 89 (3), 679 - 696

    [査読有り]

  • S. Aoki et al.

    The S = - 2 hypernuclear states formed through (K-, K+) reactions have been studied by using the 1.66 GeV/c K- beam provided by KEK Proton Synchrotron. Investigation has been done on the stars due to the capture of the XI- hyperons at rest in nuclear emulsion, which hyperons were produced in.(K-, K+) reactions. We observed a clear case of an absorption of XI- hyperon at rest by a nucleus followed by a back-to-back emission of two single-LAMBDA hypernuclei.

    日本物理学会, 1993年02月, Progress Theoretical Physics, 89 (2), 493 - 500, 英語

    [査読有り]

    研究論文(学術雑誌)

  • THE SCINTILLATING-FIBER TRACKER SYSTEM OF THE CHORUS EXPERIMENT

    J KONIJN, K HOPFNER, P LENDERMANN, M GRUWE, C MOMMAERT, P VILAIN, G WILQUET, JP FABRE, W FLEGEL, R MEIJERDREES, G STEFANINI, K WINTER, H WONG, S AOKI, G GREGOIRE, LEMAITRE, V, L MICHEL, D FREKERS, M NAKAMURA, K NIWA

    SPIE - INT SOC OPTICAL ENGINEERING, 1993年, SCINTILLATING FIBER TECHNOLOGY AND APPLICATIONS, 2007, 106 - 115, 英語

    [査読有り]

    研究論文(国際会議プロシーディングス)

  • S AOKI, G BARONI, BISI, V, AC BRESLIN, MG CATANESI, K CHIBA, DH DAVIS, S DILIBERTO, MJ ESTEN, C GERKE, K HOSHINO, M KAZUNO, M KOBAYASHI, K KODAMA, Y MAEDA, A MARZARICHIESA, MA MAZZONI, F MEDDI, F MINAKAWA, M MIYANISHI, MT MUCIACCIA, M NAKAMURA, K NAKAZAWA, K NIU, K NIWA, G POULARD, E RADICIONI, L RAMELLO, G ROMANO, G ROSA, F RUGGIERI, MS SARTORI, H SASAKI, Y SATO, C SGARBI, H SHIBUYA, S SIMONE, H TAJIMA, S TASAKA, TEZUKA, I, DN TOVEE, N USHIDA, Y YANAGISAWA

    The muonic decay of charmed strange mesons has been observed directly, in the analysis of a sample of 144 decays of charged charmed particles into a muon and no other charged particle. The branching ratio is estimated to be BR(D(s)+/- --> mu+/-nu(mu)) = (4.0(-1.4-0.6)+1.8+0.8+/-1.7) x 10(-3), assuming a ratio r = 0.27 between production cross sections of D(s)+/- and neutral charmed particles. The decay constant f(Ds) is estimated to be (232+/-45+/-20+/-48)MeV/c2 and does not depend on theoretical assumptions.

    KYOTO UNIV, 1993年01月, PROGRESS OF THEORETICAL PHYSICS, 89 (1), 131 - 138, 英語

    [査読有り]

    研究論文(学術雑誌)

  • SEARCH FOR H-DIBARYON BY SCINTILLATING FIBER TRACK DETECTOR

    JK AHN, S AOKI, KS CHUNG, MS CHUNG, H ENYO, T FUKUDA, H FUNAHASHI, Y GOTO, A HIGASHI, M IEIRI, T IIJIMA, T IINUMA, Y ITOW, K IMAI, JM LEE, S MAKINO, A MASAIKE, Y MATSUYAMA, NOMURA, I, IS PARK, N SAITO, M SEKIMOTO, YM SHIN, KS SHIM, R TAKASHIMA, F TAKEUTCHI, P TLUSTY, S WEIBE, S YOKKAICHI, S YAMASHITA, K YOSHIDA, M YOSHIDA, T YOSHIDA

    The new type of visual detector, scintillating fiber, has been used as an active target to search the H-dibaryon by using (K-,K+) interactions. The fiber target is readout by two set of image-intensifier tubes providing three dimensional information for production, decay and interaction of THETA-'s. Several hundreds of visual images of stopped and inflight interactions of THETA's are expected to be accumulated. Sensitivity for the H search as well as the feasibility to study THETA-p, THETA-C interactions are discussed.

    ELSEVIER SCIENCE BV, 1992年09月, NUCLEAR PHYSICS A, 547 (1-2), C211 - C216, 英語

    [査読有り]

    研究論文(学術雑誌)

  • RESEARCH-AND-DEVELOPMENT OF SCINTILLATING FIBER TRACKER FOR NU-MU-NU-TAU OSCILLATION EXPERIMENT

    T NAKANO, O SATO, T KAWAI, S ISHIKAWA, T KOZAKI, M NAKAMURA, K SAITO, K NIWA, K NAKAMURA, H YUUKI, T OKUSAWA, S AOKI, M CHIKAWA

    Research and development of fiber trackers for upsilon(mu) - upsilon(tau) Oscillation experiment is in progress. In order to satisfy required specifications, i.e. the position resolution must be less than 100 mum and the effective area is 1.6mx1.6m. We have tuned dopant densities of fibers and developed a machine for the construction of multi-layer ribbons with the required size.

    IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1992年08月, IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 39 (4), 680 - 684, 英語

    [査読有り]

    研究論文(学術雑誌)

  • K. Kodama, N. Ushida, A. Mokhtarani, V. S. Paolone, J. T. Volk, J. O. Wilcox, P. M. Yager, R. M. Edelstein, A. P. Freyberger, D. B. Gibaut, R. J. Lipton, W. R. Nichols, D. M. Potter, J. S. Russ, C. Zhang, Y. Zhang, H. I. Jang, J. Y. Kim, T. I. Kim, I. T. Lim, M. Y. Pac, B. R. Baller, R. J. Stefanski, K. Nakazawa, K. S. Chung, S. H. Chung, D. C. Kim, I. G. Park, M. S. Park, J. S. Song, C. S. Yoon, M. Chikawa, T. Abe, T. Fujii, G. Fujioka, K. Fujiwara, H. Fukushima, T. Hara, Y. Takahashi, K. Taruma, Y. Tsuzuki, C. Yokoyama, S. D. Chang, B. G. Cheon, J. H. Cho, J. S. Kang, C. O. Kim, K. Y. Kim, T. Y. Kim, J. C. Lee, S. B. Lee, G. Y. Lim, S. W. Nam, T. S. Shin, K. S. Sim, J. K. Woo, Y. Isokane, Y. Tsuneoka, S. Aoki, A. Gauthier, K. Hoshino, H. Kitamura, M. Kobayashi, M. Miyanishi, K. Nakamura, M. Nakamura, Y. Nakamura, S. Nakanishi, K. Niu, K. Niwa, H. Tajima, J. M. Dunlea, S. G. Frederiksen, S. Kuramata, B. G. Lundberg, G. A. Oleynik, N. W. Reay, K. Reibel, R. A. Sidwell, N. R. Stanton, K. Moriyama, H. Shibata, G. R. Kalbfleisch, P. Skubic, J. M. Snow, S. E. Willis, O. Kusumoto, T. Okusawa, m. Teranaka, T. Tominaga, T. Yoshida, H. Yuuki, H. Okabe, J. Yokota, M. Adachi, M. Kazuno, E. Niu, H. Shibuya, S. Watanabe

    The branching ratio for the decay mode D+→K*0μ+ν has been measured with two methods. The first uses D0→K-μ+ν for normalization, and yields the result B(D+→K*0μ+ν)=(3.25±0.71±0.75)%. From this method we also obtain the direct measurement Γ(D+→K*0μ+ν)/Γ(D0→K-μ+ν)=0.43±0.09±0.09. The second method uses the mode D+→K-π+π+ for normalization and yields B(D+→K*0μ+ν)=(4.18±0.66±0.96)%. Combining the results of the two methods yields B(D+→K*0μ+ν)=(3.57±0.96)%. © 1992.

    1992年07月23日, Physics Letters B, 286 (1-2), 187 - 194, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Charm Meson Production in 600 GeV/c π- emulsion interaction

    K. Kodama et al.

    We present total and differential cross sections for charm mesons produced in 600 GeV/c pi--emulsion interactions. Fits to d2-sigma/dx(F) dp(T)2 is-proportional-to (1 - Absolute value of x(F))(n)exp(- bp(T)2) for 676 electronically reconstructed D mesons with x(F) > 0 give n=4.25+/-0.24 (stat.) +/-0.23 (syst.) and b=0.76+/-0.03+/-0.03 (GeV/c)-2. The total inclusive D+ and D0 cross sections are sigma(pi--N-->D+/-; x(F) > 0)=8.66+/-0.46+/-1.96-mu-b/nucleon and sigma(pi--N-->D0/D0BAR; x(F) > 0)=22.05+/-1.37+/-4.82-mu-b/nucleon, where a linear dependence on the mean atomic weight of the target is assumed. These results are compared to next-to-leading order QCD predictions.

    Elsevier Science, 1992年06月, Physics Letters, 284 (3-4), 461 - 470, 英語

    [査読有り]

    研究論文(学術雑誌)

  • S AOKI, R ARNOLD, G BARONI, BISI, V, AC BRESLIN, MG CATANESI, K CHIBA, DH DAVIS, M DEVINCENZI, S DILIBERTO, MJ ESTEN, K HOSHINO, M KAZUNO, M KOBAYASHI, K KODAMA, Y MAEDA, G MARTELLOTTI, A MARZARICHIESA, MA MAZZONI, F MEDDI, F MINAKAWA, M MIYANISHI, MT MUCIACCIA, M NAKAMURA, K NAKAZAWA, S NATALI, K NIU, K NIWA, G PENSO, G POULARD, E RADICIONI, L RAMELLO, G ROMANO, G ROSA, MS SARTORI, H SASAKI, Y SATO, C SGARBI, H SHIBUYA, S SIMONE, HI SLETTEN, H TAJIMA, S TASAKA, TEZUKA, I, DN TOVEE, N USHIDA, Y YANAGISAWA

    Results are presented on the production cross-section of charmed particles obtained from the WA75 emulsion hybrid experiment. The events, selected by the presence of a muon with a high momentum transverse to the beam direction, were located and analysed in nuclear emulsions. A Monte Carlo simulation allowed the computation of acceptances due to both apparatus and selection, as well as scanning and finding efficiencies. The ccBAR hadroproduction cross-section has been determined over the entire X(F) region as sigma(ccBAR)=23.1+/-1.3(stat)+4.0/-3.3(syst) mu-b per nucleon assuming an A0.87 dependence.

    PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE, 1992年05月, PROGRESS OF THEORETICAL PHYSICS, 87 (5), 1305 - 1313, 英語

    [査読有り]

    研究論文(学術雑誌)

  • S AOKI, R ARNOLD, G BARONI, BISI, V, AC BRESLIN, MG CATANESI, K CHIBA, DH DAVIS, M DEVINCENZI, S DILIBERTO, MJ ESTEN, K HOSHINO, M KAZUNO, M KOBAYASHI, K KODAMA, Y MAEDA, G MARTELLOTTI, A MARZARICHIESA, MA MAZZONI, F MEDDI, F MINAKAWA, M MIYANISHI, MT MUCIACCIA, M NAKAMURA, K NAKAZAWA, S NATALI, K NIU, K NIWA, G PENSO, G POULARD, E RADICIONI, L RAMELLO, G ROMANO, G ROSA, MS SARTORI, H SASAKI, Y SATO, C SGARBI, H SHIBUYA, S SIMONE, HI SLETTEN, H TAJIMA, S TASAKA, TEZUKA, I, DN TOVEE, N USHIDA, Y YANAGISAWA

    Results are presented on the production characteristics of charmed particles obtained from the WA75 emulsion hybrid experiment. The events, selected by the presence of a muon with a high momentum transverse to the beam direction, were located and analysed in nuclear emulsions. Inclusive and correlation properties are systematically compared with the lowest-order QCD calculations for DDBAR hadroproduction. Results concerning the correlation properties indicate some contribution from next-to-leading order [O(alpha(s)3] subprocesses.

    KYOTO UNIV, 1992年05月, PROGRESS OF THEORETICAL PHYSICS, 87 (5), 1315 - 1322, 英語

    [査読有り]

    研究論文(学術雑誌)

  • K. Kodama, N. Ushida, A. Mokhtarani, V. S. Paolone, J. T. Volk, J. O. Wilcox, P. M. Yager, R. M. Edelstein, A. P. Freyberger, D. B. Gibaut, R. J. Lipton, W. R. Nichols, D. M. Potter, J. S. Russ, C. Zhang, Y. Zhang, H. I. Jang, J. Y. Kim, T. I. Kim, I. T. Lim, M. Y. Pac, B. R. Baller, R. J. Stefanski, K. Nakazawa, K. S. Chung, S. H. Chung, D. C. Kim, I. G. Park, M. S. Park, J. S. Song, C. S. Yoon, M. Chikawa, T. Abe, S. Aoki, T. Fujii, G. Fujioka, K. Fujiwara, H. Fukushima, T. Hara, Y. Takahashi, K. Taruma, Y. Tsuzuki, C. Yokoyama, S. D. Chang, B. G. Cheon, J. H. Cho, J. S. Kang, C. O. Kim, K. Y. Kim, T. Y. Kim, J. C. Lee, S. B. Lee, G. Y. Lim, S. W. Nam, T. S. Shin, K. S. Sim, J. K. Woo, Y. Isokane, Y. Tsuneoka, A. Gauthier, K. Hoshino, H. Kitamura, M. Kobayashi, M. Miyanishi, K. Nakamura, M. Nakamura, S. Nakanishi, K. Niu, K. Niwa, H. Tajima, J. M. Dunlea, S. G. Frederiksen, S. Kuramata, B. G. Lundberg, G. A. Oleynik, N. W. Reay, K. Reibel, R. A. Sidwell, N. R. Stanton, K. Moriyama, H. Shibata, G. R. Kalbfleisch, P. Skubic, J. M. Snow, S. E. Willis, W. Y. Yuan, O. Kusumoto, T. Okusawa, M. Teranaka, T. Tominaga, T. Yoshida, J. Yuuki, H. Okabe, J. Yokota, M. Adachi, M. Kazuno, E. Niu, H. Shibuya, S. Watanabe

    A measurement of the form factor ratios in the decay D+ → K*(892)0μ+ν is obtained by fitting to the decay angles and q2 of 305 events. The results, evaluated at q2 = 0, are A2(0)/A1(0) = 0.82+0.22 -0.23 (stat.)±0.11 (sys.) and V(0)/A1(0) = 2.00+0.34 -0.32±0.16, where A1 and A2 are the axial vector form factors and V is the vector form factor. The corresponding ratio of the longitudinal to transverse polarization of the K*0 is 1.18±0.18±0.08. These results are compared with other experimental results and with theoretical predictions. © 1992.

    1992年01月09日, Physics Letters B, 274 (2), 246 - 252, 英語

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    研究論文(学術雑誌)

  • K KODAMA

    We present results on charm pair correlations measured in proton-emulsion interactions at square-root s = 38.7 GeV. The predictions of leading order QCD for the distributions in invariant mass, rapidity gap, x(F), and polar angle in the charm pair CMS are qualitatively consistent with our measurements. The mean p(T) of the pairs is equal within errors to that measured in dilepton production at the same energy and mass range.

    ELSEVIER SCIENCE BV, 1991年07月, PHYSICS LETTERS B, 263 (3-4), 579 - 583, 英語

    [査読有り]

    研究論文(学術雑誌)

  • K KODAMA

    We report results on D0 and D+ production in proton-emulsion interactions at square-root s = 38.7 GeV. A fit to the form (1 - \x(F)\)n exp(-bp(T)2) yields n = 6.9(-1.8)+1.9 and b = 0.84(-0.08)+0.10 (GeV/c)-2. The total inclusive cross section, assuming linear A dependence, is measured to be 38 +/- 3 (stat.) +/- 13 (sys.) mu-b for the D0 and 38 +/- 9 +/- 14-mu-b for the D+. A comparison of these results with previous measurements indicates that nuclear effects do not strongly influence charm production. The predictions of QCD are in good agreement with our data.

    ELSEVIER SCIENCE BV, 1991年07月, PHYSICS LETTERS B, 263 (3-4), 573 - 578, 英語

    [査読有り]

    研究論文(学術雑誌)

  • DIRECT OBSERVATION OF SEQUENTIAL WEAK DECAY OF A DOUBLE HYPERNUCLEUS

    S AOKI, SY BAHK, KS CHUNG, SH CHUNG, H FUNAHASHI, CH HAHN, T HARA, S HIRATA, K HOSHINO, M IEIRI, T IIJIMA, K IMAI, T ISHIGAMI, Y ITOW, M KAZUNO, K KIKUCHI, CO KIM, DC KIM, JY KIM, M KOBAYASHI, K KODAMA, Y MAEDA, A MASAIKE, A MASUOKA, Y MATSUDA, C NAGOSHI, M NAKAMURA, S NAKANISHI, T NAKANO, K NAKAZAWA, K NIWA, H ODA, H OKABE, S ONO, R OZAKI, IG PARK, Y SATO, H SHIBUYA, HM SHIMIZU, JS SONG, M SUGIMOTO, H TAJIMA, R TAKASHIMA, F TAKEUTCHI, KH TANAKA, M TERANAKA, TEZUKA, I, H TOGAWA, N USHIDA, S WATANABE, T WATANABE, J YOKOTA, CS YOON

    We have studied stars in nuclear emulsion due to the capture at rest of the KELVIN- hyperons produced in the (K-,K+) reaction. The sequential weak decay of a double hypernucleus (nucleus with S = -2) has been directly observed. The double hypernucleus is assigned as either LAMBDA-LAMBDA-Be-10 or LAMBDA-LAMBDA-B-13. This assignment excludes the existence of the H dibaryon lighter than 2203.7 +/- O.7 MeV/c2.

    PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE, 1991年06月, PROGRESS OF THEORETICAL PHYSICS, 85 (6), 1287 - 1298, 英語

    [査読有り]

    研究論文(学術雑誌)

  • EVIDENCE OF WEAK DECAY OF HEAVY DOUBLE HYPERNUCLEI

    S AOKI, SY BAHK, KS CHUNG, SH CHUNG, H FUNAHASHI, CH HAHN, T HARA, S HIRATA, K HOSHINO, M IEIRI, T IIJIMA, K IMAI, T ISHIGAMI, Y ITOW, M KAZUNO, K KIKUCHI, CO KIM, DC KIM, JY KIM, M KOBAYASHI, K KODAMA, Y MAEDA, A MASAIKE, A MASUOKA, Y MATSUDA, C NAGOSHI, M NAKAMURA, S NAKANISHI, T NAKANO, K NAKAZAWA, K NIWA, H ODA, H OKABE, S ONO, R OZAKI, IG PARK, Y SATO, H SHIBUYA, HM SHIMIZU, JS SONG, M SUGIMOTO, H TAJIMA, R TAKASHIMA, F TAKEUTCHI, KH TANAKA, M TERANAKA, TEZUKA, I, H TOGAWA, N USHIDA, S WATANABE, T WATANABE, J YOKOTA, CS YOON

    We have studied 80 events of candidates for XI-capture star at rest in nuclear emulsion, where XI- hyperons are produced in (K-, K+) reactions identified by a K+ spectrometer. The weak decay of heavy double hypernuclei is confirmed, studying the distribution of visible energy-release and the probability of emission of two fast protons, in comparison with those for single hypernuclei.

    KYOTO UNIV, 1991年05月, PROGRESS OF THEORETICAL PHYSICS, 85 (5), 951 - 956, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Measurement of the Relative Branching Fraction Γ(D0 → K μ ν) / Γ(D0 → K μ X)

    K. Kodama et al.

    The fraction f of D0 semimuonic decays which occur through the K-mu-v mode has been measured in a hybrid emulsion spectrometer. Analysis of 124 semimuonic D0-decay candidates gives f = 0.32 +/- 0.05(stat) +/- 0.05(syst). From this measurement and existing data on the D0 semileptonic branching ratio and lifetime, we obtain the branching ratio R(D0 --> K- mu+v) = (2.4 +/- 0.4 +/- 0.5)% and partial decay rate-GAMMA(D0 --> K- mu+v) = (5.6 +/- 0.9 +/- 1.2) x 10(10) s-1.

    AMERICAN PHYSICAL SOC, 1991年04月, Phys. Rev. Lett., 66 (14), 1819 - 1822, 英語

    [査読有り]

    研究論文(学術雑誌)

  • RESEARCH-AND-DEVELOPMENT OF SCINTILLATING FIBER TRACKER FOR V-MU-V-TAU OSCILLATION EXPERIMENT

    T NAKANO, O SATO, T KAWAI, S ISHIKAWA, M NAKAMURA, K SAITO, K NIWA, K NAKAMURA, H YUUKI, T OKUSAWA, S AOKI, M CHIKAWA

    I E E E, 1991年, CONFERENCE RECORD OF THE 1991 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE, VOLS 1-3, 264 - 268, 英語

    [査読有り]

    研究論文(国際会議プロシーディングス)

  • K. Kodama, N. Ushida, R. L. Lander, A. Mokhtarani, V. S. Paolone, J. O. Wilcox, P. M. Yager, R. M. Edelstein, A. P. Freyberger, D. B. Gibaut, R. J. Lipton, W. R. Nichols, D. M. Potter, J. R. Russ, Y. Zhang, H. I. Jang, J. Y. Kim, M. Y. Pac, B. R. Baller, R. J. Stefanski, K. Nakazawa, S. Tasaka, Y. S. Choi, K. H. Chung, D. C. Kim, I. G. Park, J. S. Song, C. S. Yoon, M. Chikawa, T. Abe, T. Fujii, G. Fujioka, K. Fujiwara, H. Fukushima, T. Hara, Y. Takahashi, K. Taruma, Y. Tsuzuki, C. Yokoyama, S. D. Chang, B. G. Cheon, J. H. Cho, J. S. Kang, C. O. Kim, K. Y. Kim, T. Y. Kim, J. C. Lee, S. B. Lee, G. Y. Lim, I. T. Lim, S. W. Nam, T. S. Shin, K. S. Sim, J. K. Woo, Y. Isokane, Y. Tsuneoka, S. Aoki, A. Gauthier, K. Hoshino, H. Kitamura, M. Kobayashi, M. Miyanishi, K. Nakamura, M. Nakamura, Y. Nakamura, S. Nakanishi, K. Niu, K. Niwa, H. Tajima, J. M. Dunlea, S. G. Frederiksen, S. Kuramata, B. G. Lundberg, G. A. Oleynik, N. W. Reay, K. Reibel, C. J. Rush, R. A. Sidwell, N. R. Stanton, K. Moriyama, H. Shibata, T. S. Jaffery, G. R. Kalbfleisch, P. L. Skubic, J. M. Snow, S. E. Willis, W. Y. Yuan, O. Kusumoto, T. Okusawa, M. Teranaka, T. Tominaga, T. Watanabe, J. Yamato, H. Okabe, J. Yokota, M. Kazuno, F. Minakawa, E. Niu, S. Ono, H. Shibuya, S. Watanabe, Y. Sato, I. Tezuka, S. Y. Bahk, S. K. Kim

    A hybrid apparatus consisting of a movable emulsion target and a magnetic spectrometer was used in a fixed target Fermilab Tevatron experiment to study the production of heavy quarks by high-energy hadron beams. High-resolution silicon microstrip detectors were used for precise tracking in the dense particle environment. Details of the experimental apparatus, including the data acquisition system, are described. © 1990.

    1990年04月01日, Nuclear Inst. and Methods in Physics Research, A, 289 (1-2), 146 - 167, 英語

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    研究論文(学術雑誌)

  • S. Aoki, K. Hoshino, M. Nakamura, K. Niu, K. Niwa, N. Torii

    A fully automated emulsion analysis system has been developed by the Nagoya University Group, which has brought revolutionary progress to the analysis of nuclear emulsion plates. A description of this analysis system is given and its application to emulsion-counter hybrid experiments is introduced. © 1990.

    1990年, Nuclear Inst. and Methods in Physics Research, B, 51 (4), 466 - 472, 英語

    [査読有り]

    研究論文(学術雑誌)

  • S. Aoki, S. Y. Bahk, K. S. Chung, S. H. Chung, H. Funahashi, C. H. Hahn, T. Hara, S. Hirata, K. Hoshino, M. Ieiri, T. Iijima, K. Imai, T. Ishigami, Y. Itow, M. Kazuno, K. Kikuchi, C. O. Kim, D. C. Kim, J. Y. Kim, M. Kobayashi, K. Kodama, Y. Maeda, A. Masaike, Y. Matsuda, C. Nagoshi, M. Nakamura, S. Nakanishi, T. Nakano, K. Nakazawa, K. Niwa, H. Okabe, S. Ono, I. G. Park, Y. Sato, H. Shibuya, H. M. Shimizu, J. S. Song, H. Tajima, R. Takashima, F. Takeutchi, K. H. Tanaka, M. Teranaka, I. Tezuka, H. Togawa, Y. Ueda, N. Ushida, S. Watanabe, T. Watanabe, J. Yokota, C. S. Yoon

    We have studied (K-,K+) reactions from an emulsion target. The S=-2 H dibaryon has been searched for by the analysis of the K+ momentum spectrum together with emulsion data. No evidence of H production was observed in the mass range of 1.902.16 GeV/c2. Upper limits for the production cross section of the H are (0.20.6)% of that for the quasifree z- production at the 90% confidence level. © 1990 The American Physical Society.

    1990年, Physical Review Letters, 65 (14), 1729 - 1732, 英語

    [査読有り]

    研究論文(学術雑誌)

  • S. Aoki, R. Arnold, G. Baroni, M. Barth, J. H. Bartley, D. Bertrand, G. Bertrand-Coremans, V. Bisi, A. C. Breslin, G. Carboni, M. G. Catanesi, A. M. Cecchetti, E. Chesi, K. Chiba, M. Coupland, D. H. Davis, S. Dell'Uomo, M. De Vincenzi, S. Di Liberto, W. Donnelly, B. G. Duff, M. J. Esten, A. Frenkel, D. Gamba, C. Gerke, P. Giubellino, M. Hazama, F. F. Heymann, K. Hoshino, D. C. Imrie, Y. Isokane, T. Kaway, M. Kazuno, M. Kobayashi, K. Kodama, G. J. Lush, Y. Maeda, A. Manfredini, G. Marini, G. Martellotti, A. Marzari-Chiesa, M. A. Mazzoni, F. Meddi, F. Minakawa, M. Miyanishi, A. Montwill, M. T. Muciaccia, P. Musset, M. Nakamura, Y. Nakamura, K. Nakazawa, S. Natali, A. Nigro, K. Niu, K. Niwa, S. Nuzzo, M. Ohashi, G. Penso, P. Pistilli, F. Piuz, G. Poulard, L. Ramello, L. Riccati, G. Romano, R. Roosen, G. Rosa, F. Ruggieri, H. Sasaki, Y. Sato, A. Sciubba, C. Sgarbi, H. Shibuya, S. Simone, H. I. Sletten, H. Tajima, S. Tasaka, I. Tezuka, Y. Tomita, D. N. Tovee, P. Trent, Y. Tsuneoka, N. Ushida, S. Watanabe, O. Yamakawa, Y. Yanagisawa

    We give here a detailed description of experiment WA75, which was performed at CERN to search for beauty particles. Events containing at least one muon with a high momentum transverse to the beam direction were selected then the primary interactions and decay vertices, located in stacks of nuclear research emulsions, were examined and analysed. The various parts of the apparatus are described and the off-line analysis and search in emulsion are discussed. An estimate is made of the sensitivity of the experiment to beauty- and charmed-particle production. © 1989.

    1989年01月01日, Nuclear Inst. and Methods in Physics Research, A, 274 (1-2), 64 - 78, 英語

    [査読有り]

    研究論文(学術雑誌)

  • S. Aoki, R. Arnold, G. Baroni, M. Barth, G. Bertrand-Coremans, V. Bisi, A. C. Breslin, G. Carboni, E. Chesi, K. Chiba, D. Creanza, D. H. Davis, S. Dell'uomo, M. De Vincenzi, S. Diliberto, M. J. Esten, D. Gamba, C. Gerke, P. Giubellino, M. Hazama, K. Hoshino, Y. Isokane, M. Kazuno, M. Kobayashi, K. Kodama, Y. Maeda, A. Manfredini, G. Martellotti, A. Marzari-Chiesa, M. A. Mazzoni, F. Meddi, F. Minakawa, M. Miyanishi, A. Montwill, M. T. Muciaccia, P. Musset, M. Nakamura, K. Nakazawa, S. Natali, K. Niu, K. Niwa, S. Nuzzo, M. Ohashi, G. Penso, S. Petrera, P. Pistilli, F. Piuz, G. Poulard, L. Ramello, L. Riccati, G. Romano, R. Roosen, G. Rosa, F. Ruggieri, H. Sasaki, Y. Sato, C. Sgarbi, H. Shibuya, T. Shimizu, S. Simone, H. I. Sletten, H. Tajima, S. Tasaka, I. Tezuka, Y. Tomita, D. N. Tovee, Y. Tsuneoka, N. Ushida, S. Watanabe, O. Yamakawa, Y. Yanagisawa

    The azimuthal correlation distribution of 102 charmed-particle pairs observed in the hybrid emulsion experiment WA75 is compared with theoretical predictions. The various pairs - (D-D0), (D-D+), (D0D0) and (D+D0)-all s how, within statistical error, the same azimuthal correlation distribution, demonstrating its independence from the specific nature of the production channel. Among the decays of 150 charged charmed particles and 138 neutral ones seen, higher multiplicities are favoured for hadronic as opposed to semileptonic decays. The data are consistent with the muonic decays of charged D mesons proceeding through the channels (μ±, v, K0) and [μ±, v, K*0(892)], the fraction through K0 being 0.76±0.06. © 1988.

    ELSEVIER SCIENCE BV, 1988年07月, Physics Letters B, 209 (1), 113 - 118, 英語

    [査読有り]

    研究論文(学術雑誌)

  • N USHIDA, T KONDO, S TASAKA, IG PARK, JS SONG, T HARA, Y HOMMA, Y TSUZUKI, G FUJIOKA, H FUKUSHIMA, Y TAKAHASHI, S TATSUMI, C YOKOYAMA, K FUJIWARA, K TARUMA, SY BAHK, CO KIM, JN PARK, DC BAILEY, S CONETTI, P MERCURE, J TRISCHUK, M TURCOTTE, S AOKI, K CHIBA, H FUCHI, K HOSHINO, K KODAMA, R MATSUI, M MIYANISHI, M NAKAMURA, K NAKAZAWA, K NIU, K NIWA, M OHASHI, H SASAKI, Y TOMITA, N TORII, O YAMAKAWA, Y YANAGISAWA, GJ AUBRECHT, J DUNLEA, S ERREDE, A GAUTHIER, MJ GUTZWILLER, S KURAMATA, G OLEYNIK, NW REAY, K REIBEL, RA SIDWELL, NR STANTON, K MORIYAMA, H SHIBATA, O KUSUMOTO, Y NOGUCHI, T OKUSAWA, M TERANAKA, J YAMATO, H OKABE, J YOKOTA, P COTE, SG FREDERIKSEN, CJD HEBERT, J HEBERT, B MCLEOD, A THIBAUDEAU, M KAZUNO, H SHIBUYA, IA LOVATT, JF MARTIN, D PITMAN, JD PRENTICE, BJ STACEY, TS YOON, Y MAEDA

    Using a hybrid emulsion spectrometer installed in the Fermilab wide-band neutrino beam, we located a total of 3855 neutrino interactions in the fiducial volume of our target. For 122 charmed-particle decays found in these interactions, we present distributions of x,y, charm-muon angular projection, Feynman-X, and the fragmentation Z. We find that the number of strange quarks in the nucleon sea is 4.2±2.1±2.6% of the number of down quarks. © 1988.

    ELSEVIER SCIENCE BV, 1988年05月, PHYSICS LETTERS B, 206 (2), 380 - 384, 英語

    [査読有り]

    研究論文(学術雑誌)

  • N USHIDA, T KONDO, S TASAKA, IG PARK, JS SONG, T HARA, Y HOMMA, Y TSUZUKI, G FUJIOKA, H FUKUSHIMA, Y TAKAHASHI, S TATSUMI, C YOKOYAMA, K FUJIWARA, K TARUMA, SY BAHK, CO KIM, JN PARK, DC BAILEY, S CONETTI, P MERCURE, J TRISCHUK, M TURCOTTE, S AOKI, K CHIBA, H FUCHI, K HOSHINO, K KODAMA, R MATSUI, M MIYANISHI, M NAKAMURA, K NAKAZAWA, K NIU, K NIWA, M OHASHI, H SASAKI, Y TOMITA, N TORII, O YAMAKAWA, Y YANAGISAWA, GJ AUBRECHT, J DUNLEA, S ERREDE, A GAUTHIER, MJ GUTZWILLER, S KURAMATA, G OLEYNIK, NW REAY, K REIBEL, RA SIDWELL, NR STANTON, K MORIYAMA, H SHIBATA, O KUSUMOTO, Y NOGUCHI, T OKUSAWA, M TERANAKA, J YAMATO, H OKABE, J YOKOTA, P COTE, SG FREDERIKSEN, CJD HEBERT, J HEBERT, B MCLEOD, A THIBAUDEAU, M KAZUNO, H SHIBUYA, IA LOVATT, JF MARTIN, D PITMAN, JD PRENTICE, BJ STACEY, TS YOON, Y MAEDA

    We have found 122 charmed-particle decays among 3855 neutrino interactions located in the fiducial volume of a hybrid emulsion spectrometer installed in the Fermilab wide-band neutrino beam. We obtain an average relative charmed-particle production cross section of σ(νμ→cμ-) σ(νμ→μ-)=4.9-0.6 +0.7%, at an average neutrino energy of 22 GeV. We also obtain a production rate of σ(νμ→ccνμ) σ(νμ→νμ)=0.13-0.11 +0.31%, if we assume that there was an undetected muon, a limit of σ(νμ→ccμ-) σ(νμ→cμ-)<3% (90%CL) can be obtained. Other cross section ratios and limits are also presented. © 1988.

    ELSEVIER SCIENCE BV, 1988年05月, PHYSICS LETTERS B, 206 (2), 375 - 379, 英語

    [査読有り]

    研究論文(学術雑誌)

  • S. Aoki, R. Arnold, G. Baroni, M. Barth, J. H. Bartley, G. Bertrand-Coremans, V. Bisi, A. C. Breslin, G. Carboni, E. Chesi, K. Chiba, M. Coupland, G. Crosetti, D. H. Davis, S. Dell'uomo, S. Di Liberto, W. Donnelly, M. J. Esten, D. Gamba, C. Gerke, P. Giubellino, M. Hazama, F. F. Heymann, K. Hoshino, D. C. Imrie, Y. Isokane, M. Kazuno, M. Kobayashi, K. Kodama, G. J. Lush, Y. Maeda, A. Manfredini, A. Marzari-Chiesa, M. A. Mazzoni, F. Meddi, F. Minakawa, M. Miyanishi, A. Montwill, M. T. Muciaccia, P. Musset, M. Nakamura, K. Nakazawa, S. Natali, K. Niu, K. Niwa, S. Nuzzo, M. Ohashi, F. Piuz, G. Poulard, L. Ramello, L. Riccati, G. Romano, R. Roosen, G. Rosa, F. Ruggieri, Y. Sato, H. Sasaki, C. Sgarbi, H. Shibuya, S. Simone, H. Sletten, H. Tajima, S. Tasaka, I. Tezuka, Y. Tomita, D. N. Tovee, P. Trent, Y. Tsuneoka, N. Ushida, O. Yamakawa, Y. Yanagisawa

    Evidence is reported for the simultaneous production of four charmed particles in interactions induced by 350 GeV/c π- mesons in stacks of nuclear emulsions. The events were found during a search for beauty particles among a sample of about 200 interactions with candidates for charmed particles. The events selected required the presence of at least one muon with a high component of momentum transverse to the beam direction. © 1987.

    1987年03月19日, Physics Letters B, 187 (1-2), 185 - 190, 英語

    [査読有り]

    研究論文(学術雑誌)

  • N. Ushida et al.

    We have located 3886 neutrino interactions in the fiducial volume of a hybrid emulsion spectrometer installed in the Fermilab wide-band neutrino beam. A search for - decays yielded no candidate, resulting in an upper limit of 0.002 (0.073) for direct coupling of (e) to -. The (e) to limits to mass differences and mixing angles () between the neutrinos are at maximum mixing M2< 0.9 (9.0) eV2, and at maximum sensitivity sin2(2)< 0.004 (0.12). The direct-coupling limits are also used to show that most - decays must contain a neutral lepton other than or e. © 1986 The American Physical Society.

    1986年, Phys. Rev. Lett., 57 (23), 2897 - 2900, 英語

    [査読有り]

    研究論文(学術雑誌)

  • N. Ushida, T. Kondo, S. Tasaka, I. G. Park, J. S. Song, T. Hara, Y. Homma, Y. Tsuzuki, G. Fujioka, H. Fukushima, Y. Takahashi, S. Tatsumi, C. Yokoyama, K. Fujiwara, K. Taruma, S. Y. Bahk, C. O. Kim, J. N. Park, D. C. Bailey, S. Conetti, P. Mercure, J. Trischuk, M. Turcotte, S. Aoki, K. Chiba, H. Fuchi, K. Hoshino, K. Kodama, R. Matsui, M. Miyanishi, M. Nakamura, K. Nakazawa, K. Niu, K. Niwa, M. Ohashi, H. Sasaki, Y. Tomita, N. Torii, O. Yamakawa, Y. Yanagisawa, G. J. Aubrecht II, J. Dunlea, S. Errede, A. Gauthier, M. J. Gutzwiller, S. Kuramata, G. Oleynik, N. W. Reay, K. Reibel, R. A. Sidwell, N. R. Stanton, K. Moriyama, H. Shibata, O. Kusumoto, Y. Noguchi, T. Okusawa, M. Teranaka, J. Yamato, H. Okabe, J. Yokota, S. G. Frederiksen, C. J.D. Hebert, J. Hebert, B. McLeod, M. Kazuno, H. Shibuya, I. A. Lovatt, J. F. Martin, D. Pitman, J. D. Prentice, B. J. Stacey, T. S. Yoon, Y. Maeda

    We report final results for the D, F, and c+ lifetimes measured with a hybrid emulsion spectrometer in the wide-band neutrino beam at Fermilab. In total, 3886 neutrino and antineutrino interactions were located in the fiducial volume of the emulsion. From these interactions we have unambiguously identified 6 F and 13 c+ decays, for which the fitted lifetimes are (F)=(2.6-0.9+1.6) ×10-13 s and (c+)=(2.0-0.5+0.7)×10-13 s. 28 other decays are consistent with a D+ or D- hypothesis. From these events, we obtain a D lifetime of (11.1-2.9+4.4) × 10-13s. © 1986 The American Physical Society.

    1986年, Physical Review Letters, 56 (17), 1767 - 1770, 英語

    [査読有り]

    研究論文(学術雑誌)

  • N. Ushida, T. Kondo, S. Tasaka, I. G. Park, J. S. Song, T. Hara, Y. Homma, Y. Tsuzuki, G. Fujioka, H. Fukushima, Y. Takahashi, S. Tatsumi, C. Yokoyama, K. Fujiwara, K. Taruma, S. Y. Bahk, C. O. Kim, J. N. Park, D. C. Bailey, S. Conetti, P. Mercure, J. Trischuk, M. Turcotte, S. Aoki, K. Chiba, H. Fuchi, K. Hoshino, K. Kodama, R. Matsui, M. Miyanishi, M. Nakamura, K. Nakazawa, K. Niu, K. Niwa, M. Ohashi, H. Sasaki, Y. Tomita, N. Torii, O. Yamakawa, Y. Yanagisawa, G. J. Aubrecht II, J. Dunlea, S. Errede, A. Gauthier, M. J. Gutzwiller, S. Kuramata, G. Oleynik, N. W. Reay, K. Reibel, R. A. Sidwell, N. R. Stanton, K. Moriyama, H. Shibata, O. Kusumoto, Y. Noguchi, T. Okusawa, M. Teranaka, J. Yamato, H. Okabe, J. Yokota, S. G. Frederiksen, C. J.D. Hebert, J. Hebert, B. McLeod, M. Kazuno, H. Shibuya, I. A. Lovatt, J. F. Martin, D. Pitman, J. D. Prentice, B. J. Stacey, T. S. Yoon, Y. Maeda

    We report final results for the D0 lifetime measured with a hybrid emulsion spectrometer in the wide-band neutrino beam at Fermilab. In a total of 3886 neutrino and antineutrino interactions located in the emulsion fiducial volume, we have found 58 D0 decays, from which we determine the lifetime to be (4.3-0.5-0.2+0.7+0.1) × 10-13 s. © 1986 The American Physical Society.

    1986年, Physical Review Letters, 56 (17), 1771 - 1774, 英語

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    研究論文(学術雑誌)

  • JP ALBANESE, ALPE, V, S AOKI, R ARNOLD, G BARONI, M BARTH, JH BARTLEY, D BERTRAND, G BERTRANDCOREMANS, BISI, V, AC BRESLIN, G CARBONI, E CHESI, K CHIBA, GS COOK, M COUPLAND, G CROSETTI, DH DAVIS, S DELLUOMO, S DILIBERTO, W BONNELLY, BG DUFF, MJ ESTEN, D GAMBA, C GERKE, M HAZAMA, FF HEYMANN, K HOSHINO, DC IMRIE, Y ISOKANE, M KAZUNO, Y KODAMA, GJ LUSH, Y MAEDA, A MARZARICHIESA, MA MAZZONI, F MEDDI, M MIYANISHI, A MONTWILL, MT MUCIACCIA, P MUSSET, M NAKAMURA, K NAKAZAWA, S NATALI, K NIU, K NIWA, S NUZZO, M OHASHI, F PIUZ, G POULARD, L RAMELLO, L RICCATI, G ROMANO, R ROOSEN, G ROSA, F RUGGIERI, Y SATO, H SASAKI, C SGARBI, H SHIBUYA, S SIMONE, H SLETTEN, S TASAKA, TESUKA, I, Y TOMITA, DN TOVEE, P TRENT, Y TSUNEOKA, N USHIDA, O YAMAKAWA, Y YANAGISAWA

    The associated production of a pair of beauty particles B- and B 0 by a 350 GeV π- interaction has been observed in an emulsion target inserted in an array of silicon microstrip detectors. Both beauty particles decay into charm particles, both of which are also observed to decay in the emulsion. Two negative muons were identified and their momenta measured in a large muon spectrometer. One muon has a pT of 1.9 GeV/c and is associated with a beauty particle decay. The other, with a pT of 0.45 GeV/c is associated with a charm particle decay. The flight times of the two beauty particles are respectively (0.8 ± 0.1) × 10-13 s and (5+2 -1) × 10-13 s. Alternative interpretations of this event have negligible probability. © 1985.

    ELSEVIER SCIENCE BV, 1985年, PHYSICS LETTERS B, 158 (2), 186 - 192, 英語

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    研究論文(学術雑誌)

  • K. Abe, N. Akhlaq, R. Akutsu, A. Ali, C. Alt, C. Andreopoulos, M. Antonova, S. Aoki, T. Arihara, Y. Asada, Y. Ashida, E. T. Atkin, Y. Awataguchi, G. J. Barker, G. Barr, D. Barrow, M. Batkiewicz-Kwasniak, A. Beloshapkin, F. Bench, V. Berardi, L. Berns, S. Bhadra, A. Blanchet, A. Blondel, S. Bolognesi, T. Bonus, B. Bourguille, S. B. Boyd, A. Bravar, D. Bravo Berguño, C. Bronner, S. Bron, A. Bubak, M. Buizza Avanzini, S. Cao, S. L. Cartwright, M. G. Catanesi, A. Cervera, J. Chakrani, D. Cherdack, G. Christodoulou, M. Cicerchia, J. Coleman, G. Collazuol, L. Cook, D. Coplowe, A. Cudd, G. De Rosa, T. Dealtry, C. C. Delogu, S. R. Dennis, C. Densham, A. Dergacheva, F. Di Lodovico, S. Dolan, D. Douqa, T. A. Doyle, J. Dumarchez, P. Dunne, A. Eguchi, L. Eklund, S. Emery-Schrenk, A. Ereditato, A. J. Finch, G. Fiorillo, C. Francois, M. Friend, Y. Fujii, R. Fukuda, Y. Fukuda, K. Fusshoeller, C. Giganti, M. Gonin, E. A. G. Goodman, A. Gorin, M. Grassi, M. Guigue, D. R. Hadley, P. Hamacher-Baumann, D. A. Harris, M. Hartz, T. Hasegawa, S. Hassani, N. C. Hastings, Y. Hayato, A. Hiramoto, M. Hogan, J. Holeczek, N. T. Hong Van, T. Honjo, F. Iacob, A. K. Ichikawa, M. Ikeda, T. Ishida, M. Ishitsuka, K. Iwamoto, A. Izmaylov, N. Izumi, M. Jakkapu, B. Jamieson, S. J. Jenkins, C. Jesús-Valls, J. J. Jiang, P. Jonsson, C. K. Jung, P. B. Jurj, M. Kabirnezhad, H. Kakuno, J. Kameda, S. P. Kasetti, Y. Kataoka, Y. Katayama, T. Katori, E. Kearns, M. Khabibullin, A. Khotjantsev, T. Kikawa, H. Kikutani, S. King, J. Kisiel, T. Kobata, T. Kobayashi, L. Koch, A. Konaka, L. L. Kormos, Y. Koshio, A. Kostin, K. Kowalik, Y. Kudenko, S. Kuribayashi, R. Kurjata, T. Kutter, M. Kuze, L. Labarga, J. Lagoda, M. Lamoureux, D. Last, M. Laveder, M. Lawe, S.-K. Lin, R. P. Litchfield, S. L. Liu, A. Longhin, L. Ludovici, X. Lu, T. Lux, L. N. Machado, L. Magaletti, K. Mahn, M. Malek, S. Manly, L. Maret, A. D. Marino, L. Marti-Magro, T. Maruyama, T. Matsubara, K. Matsushita, C. Mauger, A. Maurel, K. Mavrokoridis, E. Mazzucato, N. McCauley, J. McElwee, K. S. McFarland, C. McGrew, A. Mefodiev, G. D. Megias, L. Mellet, M. Mezzetto, A. Minamino, O. Mineev, S. Mine, M. Miura, L. Molina Bueno, S. Moriyama, Th. A. Mueller, D. Munford, L. Munteanu, Y. Nagai, T. Nakadaira, M. Nakahata, Y. Nakajima, A. Nakamura, H. Nakamura, K. Nakamura, Y. Nakano, S. Nakayama, T. Nakaya, K. Nakayoshi, C. E. R. Naseby, T. V. Ngoc, V. Q. Nguyen, K. Niewczas, Y. Nishimura, K. Nishizaki, E. Noah, T. S. Nonnenmacher, F. Nova, J. Nowak, J. C. Nugent, H. M. O’Keeffe, L. O’Sullivan, T. Odagawa, T. Ogawa, R. Okada, K. Okumura, T. Okusawa, R. A. Owen, Y. Oyama, V. Palladino, V. Paolone, M. Pari, W. C. Parker, J. Parlone, S. Parsa, J. Pasternak, M. Pavin, D. Payne, G. C. Penn, D. Pershey, L. Pickering, C. Pidcott, G. Pintaudi, C. Pistillo, B. Popov, K. Porwit, M. Posiadala-Zezula, B. Quilain, T. Radermacher, E. Radicioni, B. Radics, P. N. Ratoff, M. Reh, C. Riccio, E. Rondio, S. Roth, A. Rubbia, A. C. Ruggeri, C. A. Ruggles, A. Rychter, L. S. M. Lakshmi, K. Sakashita, F. Sánchez, G. Santucci, C. M. Schloesser, K. Scholberg, M. Scott, Y. Seiya, T. Sekiguchi, H. Sekiya, D. Sgalaberna, A. Shaikhiev, A. Shaykina, M. Shiozawa, W. Shorrock, A. Shvartsman, K. Skwarczynski, M. Smy, J. T. Sobczyk, H. Sobel, F. J. P. Soler, Y. Sonoda, R. Spina, S. Suvorov, A. Suzuki, S. Y. Suzuki, Y. Suzuki, A. A. Sztuc, M. Tada, M. Tajima, A. Takeda, Y. Takeuchi, H. K. Tanaka, Y. Tanihara, M. Tani, N. Teshima, N. Thamm, L. F. Thompson, W. Toki, C. Touramanis, T. Towstego, K. M. Tsui, T. Tsukamoto, M. Tzanov, Y. Uchida, M. Vagins, S. Valder, D. Vargas, G. Vasseur, C. Vilela, W. G. S. Vinning, T. Vladisavljevic, T. Wachala, J. Walker, J. G. Walsh, Y. Wang, L. Wan, D. Wark, M. O. Wascko, A. Weber, R. Wendell, M. J. Wilking, C. Wilkinson, J. R. Wilson, K. Wood, C. Wret, J. Xia, Y.-h. Xu, K. Yamamoto, C. Yanagisawa, G. Yang, T. Yano, K. Yasutome, N. Yershov, M. Yokoyama, T. Yoshida, Y. Yoshimoto, M. Yu, R. Zaki, A. Zalewska, J. Zalipska, K. Zaremba, G. Zarnecki, M. Ziembicki, M. Zito, S. Zsoldos

    American Physical Society (APS), 2021年06月21日, Physical Review D, 103 (11)

    研究論文(学術雑誌)

  • K. Abe, N. Akhlaq, R. Akutsu, A. Ali, C. Alt, C. Andreopoulos, M. Antonova, S. Aoki, T. Arihara, Y. Asada, Y. Ashida, E. T. Atkin, Y. Awataguchi, G. J. Barker, G. Barr, D. Barrow, M. Batkiewicz-Kwasniak, A. Beloshapkin, F. Bench, V. Berardi, L. Berns, S. Bhadra, A. Blanchet, A. Blondel, S. Bolognesi, T. Bonus, B. Bourguille, S. B. Boyd, A. Bravar, D. Bravo Berguño, C. Bronner, S. Bron, A. Bubak, M. Buizza Avanzini, S. Cao, S. L. Cartwright, M. G. Catanesi, A. Cervera, J. Chakrani, D. Cherdack, G. Christodoulou, M. Cicerchia, J. Coleman, G. Collazuol, L. Cook, D. Coplowe, A. Cudd, G. De Rosa, T. Dealtry, C. C. Delogu, S. R. Dennis, C. Densham, A. Dergacheva, F. Di Lodovico, S. Dolan, D. Douqa, T. A. Doyle, J. Dumarchez, P. Dunne, A. Eguchi, L. Eklund, S. Emery-Schrenk, A. Ereditato, A. J. Finch, G. Fiorillo, C. Francois, M. Friend, Y. Fujii, R. Fukuda, Y. Fukuda, K. Fusshoeller, C. Giganti, M. Gonin, E. A. G. Goodman, A. Gorin, M. Grassi, M. Guigue, D. R. Hadley, P. Hamacher-Baumann, D. A. Harris, M. Hartz, T. Hasegawa, S. Hassani, N. C. Hastings, Y. Hayato, A. Hiramoto, M. Hogan, J. Holeczek, N. T. Hong Van, T. Honjo, F. Iacob, A. K. Ichikawa, M. Ikeda, T. Ishida, M. Ishitsuka, K. Iwamoto, A. Izmaylov, N. Izumi, M. Jakkapu, B. Jamieson, S. J. Jenkins, C. Jesús-Valls, J. J. Jiang, P. Jonsson, C. K. Jung, P. B. Jurj, M. Kabirnezhad, H. Kakuno, J. Kameda, S. P. Kasetti, Y. Kataoka, Y. Katayama, T. Katori, E. Kearns, M. Khabibullin, A. Khotjantsev, T. Kikawa, H. Kikutani, S. King, J. Kisiel, T. Kobata, T. Kobayashi, L. Koch, A. Konaka, L. L. Kormos, Y. Koshio, A. Kostin, K. Kowalik, Y. Kudenko, S. Kuribayashi, R. Kurjata, T. Kutter, M. Kuze, L. Labarga, J. Lagoda, M. Lamoureux, D. Last, M. Laveder, M. Lawe, S.-K. Lin, R. P. Litchfield, S. L. Liu, A. Longhin, L. Ludovici, X. Lu, T. Lux, L. N. Machado, L. Magaletti, K. Mahn, M. Malek, S. Manly, L. Maret, A. D. Marino, L. Marti-Magro, T. Maruyama, T. Matsubara, K. Matsushita, C. Mauger, A. Maurel, K. Mavrokoridis, E. Mazzucato, N. McCauley, J. McElwee, K. S. McFarland, C. McGrew, A. Mefodiev, G. D. Megias, L. Mellet, M. Mezzetto, A. Minamino, O. Mineev, S. Mine, M. Miura, L. Molina Bueno, S. Moriyama, Th. A. Mueller, D. Munford, L. Munteanu, Y. Nagai, T. Nakadaira, M. Nakahata, Y. Nakajima, A. Nakamura, H. Nakamura, K. Nakamura, Y. Nakano, S. Nakayama, T. Nakaya, K. Nakayoshi, C. E. R. Naseby, T. V. Ngoc, V. Q. Nguyen, K. Niewczas, Y. Nishimura, K. Nishizaki, E. Noah, T. S. Nonnenmacher, F. Nova, J. Nowak, J. C. Nugent, H. M. O’Keeffe, L. O’Sullivan, T. Odagawa, T. Ogawa, R. Okada, K. Okumura, T. Okusawa, R. A. Owen, Y. Oyama, V. Palladino, V. Paolone, M. Pari, W. C. Parker, J. Parlone, S. Parsa, J. Pasternak, M. Pavin, D. Payne, G. C. Penn, D. Pershey, L. Pickering, C. Pidcott, G. Pintaudi, C. Pistillo, B. Popov, K. Porwit, M. Posiadala-Zezula, A. Pritchard, B. Quilain, T. Radermacher, E. Radicioni, B. Radics, P. N. Ratoff, M. Reh, C. Riccio, E. Rondio, S. Roth, A. Rubbia, A. C. Ruggeri, C. A. Ruggles, A. Rychter, L. S. M. Lakshmi, K. Sakashita, F. Sánchez, G. Santucci, C. M. Schloesser, K. Scholberg, M. Scott, Y. Seiya, T. Sekiguchi, H. Sekiya, D. Sgalaberna, A. Shaikhiev, A. Shaykina, M. Shiozawa, W. Shorrock, A. Shvartsman, K. Skwarczynski, M. Smy, J. T. Sobczyk, H. Sobel, F. J. P. Soler, Y. Sonoda, R. Spina, S. Suvorov, A. Suzuki, S. Y. Suzuki, Y. Suzuki, A. A. Sztuc, M. Tada, M. Tajima, A. Takeda, Y. Takeuchi, H. K. Tanaka, Y. Tanihara, M. Tani, N. Teshima, N. Thamm, L. F. Thompson, W. Toki, C. Touramanis, T. Towstego, K. M. Tsui, T. Tsukamoto, M. Tzanov, Y. Uchida, M. Vagins, S. Valder, D. Vargas, G. Vasseur, C. Vilela, W. G. S. Vinning, T. Vladisavljevic, T. Wachala, J. Walker, J. G. Walsh, Y. Wang, L. Wan, D. Wark, M. O. Wascko, A. Weber, R. Wendell, M. J. Wilking, C. Wilkinson, J. R. Wilson, K. Wood, C. Wret, J. Xia, Y.-h. Xu, K. Yamamoto, C. Yanagisawa, G. Yang, T. Yano, K. Yasutome, N. Yershov, M. Yokoyama, T. Yoshida, Y. Yoshimoto, M. Yu, R. Zaki, A. Zalewska, J. Zalipska, K. Zaremba, G. Zarnecki, M. Ziembicki, M. Zito, S. Zsoldos

    American Physical Society (APS), 2021年06月16日, Physical Review D, 103 (11)

    研究論文(学術雑誌)

  • 森元 祐介, 福田 努, 長縄 直崇, 六條 宏紀, 北川 暢子, 森島 邦博, 河原 宏晃, 西尾 晃, 鈴木 陽介, 高尾 知暉, 杉村 昴, 渋谷 寛, 青木 茂樹, 高橋 覚, 山田 恭平, 呉坪 健司, 丸嶋 利嗣, 三角 尚治, 花岡 佑哉, 中家 剛, 市川 温子, 林野 竜也, 小川 了, 仲村 佳悟, 平本 綾美, Sanjana Ina, 安留 健嗣, 南野 彰宏, 早戸 良成, 横山 将志, 古賀 太一朗, 竹馬 匠泰, 田村 陸, 松尾 友和, 他 NINJA Collaboration, 大島 仁, 中村 光廣, 佐藤 修, 中野 敏行, 小松 雅宏

    一般社団法人 日本物理学会, 2018年, 日本物理学会講演概要集, 73, 101 - 101, 日本語

  • 大島 仁, 中野 敏行, 小松 雅宏, 長縄 直崇, 六條 宏紀, 北川 暢子, 森島 邦博, 河原 宏晃, 西尾 晃, 鈴木 陽介, 高尾 知暉, 渋谷 寛, 石塚 唯和, 杉村 昴, 青木 茂樹, 高橋 覚, 山田 恭平, 呉坪 健司, 丸嶋 利嗣, 三角 尚治, 花岡 佑哉, 中家 剛, 小川 了, 市川 温子, 林野 竜也, 仲村 佳悟, 平本 綾美, Sanjana Ina, 安留 健嗣, 南野 彰宏, 早戸 良成, 横山 将志, 古賀 太一朗, 松尾 友和, 竹馬 匠泰, 他 NINJA Collaboration, 森元 祐介, 小坂井 悠介, 福田 努, 中村 光廣, 佐藤 修

    一般社団法人 日本物理学会, 2018年, 日本物理学会講演概要集, 73, 106 - 106, 日本語

  • 三角 尚治, 花岡 佑哉, 渋谷 寛, 小川 了, 松尾 友和, 森元 祐介, 大島 仁, 庵 翔太, 稲生 恒明, 水沢 萌, 岡田 悠久, 佐藤 陽一, 青木 茂樹, 高橋 覚, 山田 恭平, 呉坪 健司, 丸嶋 利嗣, 松本 明佳, 福田 努, 中村 光廣, 佐藤 修, 中野 敏行, 小松 雅宏, 長縄 直崇, 六條 宏紀, 北川 暢子, 吉本 雅浩, 河原 宏晃, 西尾 晃, 松下 昴弘, 中家 剛, 市川 温子, 南野 彰宏, 林野 竜也, 仲村 佳悟, 山本 実加, 平本 綾美, 横山 将志, 古賀 太一朗, 竹馬 匠泰, 細身 郁直

    我々は、低エネルギーでのニュートリノ反応断面積の測定と、将来的にはステライルニュートリノ問題に決着をつけることを目指している。そのためのテスト実験(J-PARC T60)を、2014年より段階的に行っている。本実験では、Sub-Multi GeVエネルギーのニュートリノビームを標的兼検出器であるECC(Emulsion cloud chamber)に照射し、顕微鏡ステージを用いてデータを自動取得し、ニュートリノ反応の解析を行っている。本講演では、2015年1月末から5月末にかけてビーム照射したECCの原子核乾板の現像結果について報告する。

    一般社団法人 日本物理学会, 2016年, 日本物理学会講演概要集, 71, 82 - 82, 日本語

MISC

  • K. Abe, R. Akutsu, A. Ali, C. Alt, C. Andreopoulos, L. Anthony, M. Antonova, S. Aoki, A. Ariga, Y. Ashida, E. T. Atkin, Y. Awataguchi, S. Ban, M. Barbi, G. J. Barker, G. Barr, C. Barry, M. Batkiewicz-Kwasniak, A. Beloshapkin, F. Bench, V. Berardi, S. Berkman, L. Berns, S. Bhadra, S. Bienstock, A. Blondel, S. Bolognesi, B. Bourguille, S. B. Boyd, D. Brailsford, A. Bravar, C. Bronner, M. Buizza Avanzini, J. Calcutt, T. Campbell, S. Cao, S. L. Cartwright, M. G. Catanesi, A. Cervera, A. Chappell, C. Checchia, D. Cherdack, N. Chikuma, G. Christodoulou, J. Coleman, G. Collazuol, L. Cook, D. Coplowe, A. Cudd, A. Dabrowska, G. De Rosa, T. Dealtry, P. F. Denner, S. R. Dennis, C. Densham, F. Di Lodovico, N. Dokania, S. Dolan, O. Drapier, J. Dumarchez, P. Dunne, L. Eklund, S. Emery-Schrenk, A. Ereditato, P. Fernandez, T. Feusels, A. J. Finch, G. A. Fiorentini, G. Fiorillo, C. Francois, M. Friend, Y. Fujii, R. Fujita, D. Fukuda, R. Fukuda, Y. Fukuda, K. Gameil, C. Giganti, T. Golan, M. Gonin, A. Gorin, M. Guigue, D. R. Hadley, J. T. Haigh, P. Hamacher-Baumann, M. Hartz, T. Hasegawa, N. C. Hastings, T. Hayashino, Y. Hayato, A. Hiramoto, M. Hogan, J. Holeczek, N. T. Hong Van, F. Iacob, A. K. Ichikawa, M. Ikeda, T. Ishida, T. Ishii, M. Ishitsuka, K. Iwamoto, A. Izmaylov, B. Jamieson, S. J. Jenkins, C. Jesús-Valls, M. Jiang, S. Johnson, P. Jonsson, C. K. Jung, M. Kabirnezhad, A. C. Kaboth, T. Kajita, H. Kakuno, J. Kameda, D. Karlen, Y. Kataoka, T. Katori, Y. Kato, E. Kearns, M. Khabibullin, A. Khotjantsev, H. Kim, J. Kim, S. King, J. Kisiel, A. Knight, A. Knox, T. Kobayashi, L. Koch, T. Koga, A. Konaka, L. L. Kormos, Y. Koshio, K. Kowalik, H. Kubo, Y. Kudenko, N. Kukita, R. Kurjata, T. Kutter, M. Kuze, L. Labarga, J. Lagoda, M. Lamoureux, M. Laveder, M. Lawe, M. Licciardi, T. Lindner, R. P. Litchfield, S. L. Liu, X. Li, A. Longhin, L. Ludovici, X. Lu, T. Lux, L. Magaletti, K. Mahn, M. Malek, S. Manly, L. Maret, A. D. Marino, J. F. Martin, T. Maruyama, T. Matsubara, K. Matsushita, V. Matveev, K. Mavrokoridis, E. Mazzucato, M. McCarthy, N. McCauley, K. S. McFarland, C. McGrew, A. Mefodiev, C. Metelko, M. Mezzetto, A. Minamino, O. Mineev, S. Mine, M. Miura, L. Molina Bueno, S. Moriyama, J. Morrison, Th. A. Mueller, L. Munteanu, S. Murphy, Y. Nagai, T. Nakadaira, M. Nakahata, Y. Nakajima, A. Nakamura, K. G. Nakamura, K. Nakamura, S. Nakayama, T. Nakaya, K. Nakayoshi, C. Nantais, T. V. Ngoc, K. Niewczas, K. Nishikawa, Y. Nishimura, T. S. Nonnenmacher, F. Nova, P. Novella, J. Nowak, J. C. Nugent, H. M. O'Keeffe, L. O'Sullivan, K. Okumura, T. Okusawa, S. M. Oser, R. A. Owen, Y. Oyama, V. Palladino, J. L. Palomino, V. Paolone, W. C. Parker, P. Paudyal, M. Pavin, D. Payne, G. C. Penn, L. Pickering, C. Pidcott, E. S. Pinzon Guerra, C. Pistillo, B. Popov, K. Porwit, M. Posiadala-Zezula, A. Pritchard, B. Quilain, T. Radermacher, E. Radicioni, B. Radics, P. N. Ratoff, E. Reinherz-Aronis, C. Riccio, E. Rondio, S. Roth, A. Rubbia, A. C. Ruggeri, A. Rychter, K. Sakashita, F. Sánchez, C. M. Schloesser, K. Scholberg, J. Schwehr, M. Scott, Y. Seiya, T. Sekiguchi, H. Sekiya, D. Sgalaberna, R. Shah, A. Shaikhiev, F. Shaker, A. Shaykina, M. Shiozawa, W. Shorrock, A. Shvartsman, A. Smirnov, M. Smy, J. T. Sobczyk, H. Sobel, F. J, P. Soler, Y. Sonoda, J. Steinmann, S. Suvorov, A. Suzuki, S. Y. Suzuki, Y. Suzuki, A. A. Sztuc, M. Tada, A. Takeda, Y. Takeuchi, H. K. Tanaka, H. A. Tanaka, S. Tanaka, L. F. Thompson, W. Toki, C. Touramanis, K. M. Tsui, T. Tsukamoto, M. Tzanov, Y. Uchida, W. Uno, M. Vagins, S. Valder, Z. Vallari, D. Vargas, G. Vasseur, C. Vilela, W. G. S. Vinning, T. Vladisavljevic, V. V. Volkov, T. Wachala, J. Walker, J. G. Walsh, Y. Wang, D. Wark, M. O. Wascko, A. Weber, R. Wendell, M. J. Wilking, C. Wilkinson, J. R. Wilson, R. J. Wilson, K. Wood, C. Wret, Y. Yamada, K. Yamamoto, C. Yanagisawa, G. Yang, T. Yano, K. Yasutome, S. Yen, N. Yershov, M. Yokoyama, T. Yoshida, M. Yu, A. Zalewska, J. Zalipska, K. Zaremba, G. Zarnecki, M. Ziembicki, E. D. Zimmerman, M. Zito, S. Zsoldos, A. Zykova

    This paper reports the first differential measurement of the charged-current
    $\overline{\nu}_{\mu}$ interaction cross section on water with no pions in the
    final state. The unfolded flux-averaged measurement using the T2K off-axis near
    detector is given in double differential bins of $\mu^+$ momentum and angle.
    The integrated cross section in a restricted phase space is
    $\sigma=\left(1.11\pm0.18\right)\times10^{-38}$ cm$^{2}$ per water molecule.
    Comparisons with several nuclear models are also presented.

    American Physical Society (APS), 2019年08月27日, Physical Review D, 101 (11)

  • J-PARC Neutrino Beamline Upgrade Technical Design Report

    K. Abe, H. Aihara, A. Ajmi, C. Alt, C. Andreopoulos, M. Antonova, S. Aoki, Y. Asada, Y. Ashida, A. Atherton, E. Atkin, S. Ban, F. C. T. Barbato, M. Barbi, G. J. Barker, G. Barr, M. Batkiewicz, A. Beloshapkin, V. Berardi, L. Berns, S. Bhadra, J. Bian, S. Bienstock, A. Blondel, S. Bolognesi, J. Borg, B. Bourguille, S. B. Boyd, D. Brailsford, A. Bravar, S. Bron, C. Bronner, M. Buizza Avanzini, N. F. Calabria, J. Calcutt, R. G. Calland, D. Calvet, T. Campbell, S. Cao, S. L. Cartwright, M. G. Catanesi, A. Cervera, A. Chappell, D. Cherdack, N. Chikuma, G. Christodoulou, M. Cicerchia, A. Clifton, G. Cogo, J. Coleman, G. Collazuol, D. Coplowe, A. Cudd, A. Dabrowska, A. Delbart, A. De Roeck, G. De Rosa, T. Dealtry, A. Dell'acqua, P. F. Denner, S. R. Dennis, C. Densham, D. Dewhurst, F. Di Lodovico, S. Dolan, N. Dokania, D. Doqua, O. Drapier, K. E. Duffy, J. Dumarchez, P. J. Dunne, M. Dziewiecki, L. Eklund, S. Emery-Schrenk, S. Fedotov, P. Fernandez, T. Feusels, A. J. Finch, G. A. Fiorentini, G. Fiorillo, M. Fitton, M. Friend, Y. Fujii, R. Fujita, D. Fukuda, R. Fukuda, Y. Fukuda, K. Fusshoeller, A. Gendotti, C. Giganti, F. Gizzarelli, M. Gonin, A. Gorin, F. Gramegna, M. Guigue, D. R. Hadley, J. T. Haigh, S. -P. Hallsjö, P. Hamacher-Baumann, D. Hansen, J. Harada, M. Hartz, T. Hasegawa, N. C. Hastings, Y. Hayato, A. Hiramoto, M. Hogan, J. Holeczek, F. Iacob, A. K. Ichikawa, M. Ikeda, J. Imber, T. Ishida, T. Ishii, T. Ishii, M. Ishitsuka, E. Iwai, K. Iwamoto, A. Izmaylov, B. Jamieson, M. Jiang, S. Johnson, P. Jonsson, C. K. Jung, M. Kabirnezhad, A. C. Kaboth, T. Kajita, H. Kakuno, J. Kameda, S. Kasetti, Y. Kataoka, T. Katori, E. Kearns, M. Khabibullin, A. Khotjantsev, T. Kikawa, H. Kim, S. King, J. Kisiel, A. Knight, A. Knox, T. Kobayashi, L. Koch, A. Konaka, L. L. Kormos, A. Korzenev, Y. Koshio, K. Kowalik, W. Kropp, Y. Kudenko, S. Kuribayashi, R. Kurjata, T. Kutter, M. Kuze, L. Labarga, J. Lagoda, I. Lamont, M. Lamoureux, D. Last, M. Laveder, M. Lawe, T. Lindner, Z. J. Liptak, R. P. Litchfield, S. Liu, K. R. Long, A. Longhin, J. P. Lopez, L. Ludovici, X. Lu, T. Lux, L. Magaletti, L. Magro, K. Mahn, M. Malek, S. Manly, T. Marchi, L. Maret, A. D. Marino, J. F. Martin, S. Martynenko, T. Maruyama, T. Matsubara, K. Matsushita, V. Matveev, C. Mauger, K. Mavrokoridis, E. Mazzucato, M. McCarthy, N. McCauley, K. S. McFarland, C. McGrew, A. Mefodiev, C. Metelko, M. Mezzetto, P. Mijakowski, J. Mijakowski, A. Minamino, O. Mineev, S. Mine, A. Missert, M. Miura, L. Molina Bueno, S. Moriyama, J. Morrison, Th. A. Mueller, S. Murphy, Y. Nagai, T. Nakadaira, M. Nakahata, Y. Nakajima, A. Nakamura, K. G. Nakamura, K. Nakamura, S. Nakayama, T. Nakaya, K. Nakayoshi, C. Nantais, T. V. Ngoc, K. Nishikawa, Y. Nishimura, T. Nonnenmacher, F. Nova, P. Novella, J. Nowak, J. C. Nugent, H. M. O'Keeffe, T. Odagawa, R. Ohta, K. Okamoto, K. Okumura, T. Okusawa, T. Ovsyannikova, R. A. Owen, Y. Oyama, V. Palladino, V. Paolone, M. Pari, W. Parker, S. Parsa, J. Pasternak, C. Pastore, M. Pavin, D. Payne, J. D. Perkin, L. Pickard, L. Pickering, E. S. Pinzon Guerra, B. Popov, M. Posiadala-Zezula, J. -M. Poutissou, R. Poutissou, J. Pozimski, P. Przewlocki, H. Przybilsk, B. Quilain, T. Radermacher, E. Radicioni, B. Radics, P. N. Ratoff, E. Reinherz-Aronis, C. Riccio, P. Rojas, E. Rondio, B. Rossi, S. Roth, A. Rubbia, A. C. Ruggeri, C. A. Ruggles, A. Rychter, K. Sakashita, F. Sánchez, C. M. Schloesser, K. Scholberg, J. Schwehr, M. Scott, Y. Seiya, T. Sekiguchi, H. Sekiya, D. Sgalaberna, A. Shaikina, R. Shah, A. Shaikhiev, F. Shaker, D. Shaw, M. Shiozawa, T. Shirahige, W. Shorrock, A. Smirnov, M. Smy, J. T. Sobczyk, H. Sobel, F. J, P. Soler, L. Southwell, R. Spina, J. Steinmann, T. Stewart, P. Stowell, S. Suvorov, A. Suzuki, S. Y. Suzuki, Y. Suzuki, J. Swierblewski, M. Szeptycka, S. Szoldos, A. Sztuc, R. Tacik, M. Tada, M. Tajima, A. Takeda, Y. Takeuchi, H. K. Tanaka, H. A. Tanaka, L. F. Thompson, W. Toki, T. Tomura, C. Touramanis, K. Tsui, T. Tsukamoto, M. Tzanov, M. A. Uchida, Y. Uchida, M. Vagins, N. H. Van, G. Vasseur, T. Viant, C. Vilela, T. Wachala, C. W. Walter, Y. Wang, D. Wark, M. O. Wascko, A. Weber, R. Wendell, R. J. Wilkes, M. J. Wilking, J. R. Wilson, R. J. Wilson, K. Wood, C. Wret, Y. Yamada, K. Yamamoto, C. Yanagisawa, G. Yang, T. Yano, K. Yasutome, S. Yen, N. Yershov, M. Yokoyama, T. Yoshida, T. Yuan, M. Yu, A. Zalewska, J. Zalipska, L. Zambelli, K. Zaremba, M. Ziembicki, E. D. Zimmerman, M. Zito, E. Hamada, N. Higashi, E. Hirose, Y. Igarashi, M. Iida, M. Iio, M. Ikeno, N. Kimura, N. Kurosawa, Y. Makida, T. Nakamoto, T. Ogitsu, H. Ohhata, R. Okada, T. Okamura, M. Onaka, K. Sasaki, S. Shimazaki, M. Shoji, M. Sugano, K. Tanaka, M. Tanaka, A. Terashima, T. Tomaru, T. Uchida, M. Yoshida

    In this document, technical details of the upgrade plan of the J-PARC
    neutrino beamline for the extension of the T2K experiment are described. T2K
    has proposed to accumulate data corresponding to $2\times{}10^{22}$
    protons-on-target in the next decade, aiming at an initial observation of CP
    violation with $3\sigma$ or higher significance in the case of maximal CP
    violation. Methods to increase the neutrino beam intensity, which are necessary
    to achieve the proposed data increase, are described.

    2019年08月14日

    機関テクニカルレポート,技術報告書,プレプリント等

  • T2K ND280 Upgrade - Technical Design Report

    K. Abe, H. Aihara, A. Ajmi, C. Andreopoulos, M. Antonova, S. Aoki, Y. Asada, Y. Ashida, A. Atherton, E. Atkin, D. Attié, S. Ban, M. Barbi, G. J. Barker, G. Barr, M. Batkiewicz, A. Beloshapkin, V. Berardi, L. Berns, S. Bhadra, J. Bian, S. Bienstock, A. Blondel, J. Boix, S. Bolognesi, J. Borg, S. Bordoni, B. Bourguille, S. B. Boyd, D. Brailsford, A. Bravar, C. Bronner, D. Browning, M. Buizza Avanzini, F. Cadoux, N. F. Calabria, J. Calcutt, R. G. Calland, D. Calvet, T. Campbell, S. Cao, S. L. Cartwright, R. Castillo, M. G. Catanesi, W. Ceria, A. Cervera, A. Chappell, D. Cherdack, N. Chikuma, G. Christodoulou, M. Cicerchia, A. Clifton, G. Cogo, P. Colas, J. Coleman, G. Collazuol, D. Coplowe, A. Cudd, A. Dabrowska, A. Delbart, A. De Roeck, G. De Rosa, T. Dealtry, P. F. Denner, S. R. Dennis, C. Densham, R. de Oliveira, D. Dewhurst, F. Di Lodovico, N. Dokania, S. Dolan, D. Douqa, O. Drapier, K. E. Duffy, J. Dumarchez, P. J. Dunne, M. Dziewiecki, S. Emery-Schrenk, A. Evangelisti, Y. Favre, S. Fedotov, P. Fernandez, T. Feusels, A. J. Finch, G. A. Fiorentini, G. Fiorillo, M. Fitton, M. Friend, Y. Fujii, R. Fujita, D. Fukuda, R. Fukuda, Y. Fukuda, A. Garcia, C. Giganti, F. Gizzarelli, M. Gonin, A. Gorin, F. Gramegna, M. Guida, M. Guigue, D. R. Hadley, L. Haegel, J. T. Haigh, P. Hamacher-Baumann, D. Hansen, J. Harada, M. Hartz, T. Hasegawa, N. C. Hastings, Y. Hayato, A. Hiramoto, M. Hogan, R. Howell, J. Holeczek, F. Iacob, A. K. Ichikawa, M. Ikeda, J. Imber, R. A. Intonti, T. Ishida, T. Ishii, T. Ishii, M. Ishitsuka, E. Iwai, K. Iwamoto, A. Izmaylov, B. Jamieson, C. Jesus-Valls, M. Jiang, S. Johnson, J. H. Jo, P. Jonsson, C. K. Jung, M. Kabirnezhad, A. C. Kaboth, T. Kajita, H. Kakuno, J. Kameda, S. Kasetti, Y. Kataoka, T. Katori, E. Kearns, M. Khabibullin, A. Khotjantsev, T. Kikawa, H. Kim, S. King, J. Kisiel, A. Knight, A. Knox, T. Kobayashi, L. Koch, A. Konaka, L. L. Kormos, A. Korzenev, U. Kose, A. Kostin, Y. Koshio, K. Kowalik, W. Kropp, Y. Kudenko, S. Kuribayashi, R. Kurjata, T. Kutter, M. Kuze, L. Labarga, J. Lagoda, I. Lamont, M. Lamoureux, M. Laveder, M. Lawe, T. Lindner, Z. J. Liptak, R. P. Litchfield, X. Li, S. Liu, K. R. Long, A. Longhin, J. P. Lopez, P. F. Loverre, L. Ludovici, X. Lu, T. Lux, L. Magaletti, L. Magro, K. Mahn, M. Malek, S. Manly, T. Marchi, L. Maret, A. D. Marino, J. F. Martin, S. Martynenko, T. Maruyama, J. Marzec, T. Matsubara, K. Matsushita, V. Matveev, K. Mavrokoridis, E. Mazzucato, M. McCarthy, N. McCauley, K. S. McFarland, C. McGrew, A. Mefodiev, B. Mehl, P. Mermod, C. Metelko, M. Mezzetto, J. Michalowski, P. Mijakowski, A. Minamino, O. Mineev, S. Mine, A. Missert, M. Miura, D. Mladenov, S. Monsalvo, S. Moriyama, J. Morrison, Th. A. Mueller, J. Mundet, Y. Nagai, T. Nakadaira, M. Nakahata, Y. Nakajima, A. Nakamura, K. G. Nakamura, K. Nakamura, S. Nakayama, T. Nakaya, K. Nakayoshi, C. Nantais, L. Nascimento Machado, M. Nessi, T. V. Ngoc, K. Nishikawa, Y. Nishimura, E. Noah, T. Nonnenmacher, P. Novella, J. Nowak, H. M. O'Keeffe, T. Odagawa, R. Ohta, K. Okamoto, K. Okumura, T. Okusawa, Y. Orain, T. Ovsyannikova, R. A. Owen, Y. Oyama, V. Palladino, J. L. Palomino, V. Paolone, J. M. Parraud, M. Pari, W. Parker, S. Parsa, J. Pasternak, C. Pastore, M. Pavin, D. Payne, A. Pepato, J. D. Perkin, F. Pietropaolo, L. Pickard, L. Pickering, E. S. Pinzon Guerra, O. Pizzirusso, B. Popov, J. Porthault, M. Posiadala-Zezula, J. -M. Poutissou, R. Poutissou, J. Pozimski, P. Przewlocki, H. Przybilski, B. Quilain, T. Radermacher, E. Radicioni, P. N. Ratoff, M. Ravonel, M. A. M. Rayner, E. Reinherz-Aronis, F. Resnati, M. Riallot, C. Riccio, P. Rojas, G. Romanino, E. Rondio, F. Rossi, S. Roth, A. Rychter, K. Sakashita, F. Sánchez, E. Scantamburlo, K. Scholberg, J. Schwehr, M. Scott, Y. Seiya, T. Sekiguchi, H. Sekiya, D. Sgalaberna, A. Shaikina, R. Shah, A. Shaikhiev, F. Shaker, D. Shaw, M. Shiozawa, T. Shirahige, W. Shorrock, A. Smirnov, M. Smy, J. T. Sobczyk, H. Sobel, L. Southwell, R. Spina, J. Steinmann, T. Stewart, P. Stowell, S. Suvorov, A. Suzuki, S. Y. Suzuki, Y. Suzuki, M. Szeptycka, S. Szoldos, A. Sztuc, J. Swierblewski, R. Tacik, M. Tada, M. Tajima, A. Takeda, Y. Takeuchi, H. K. Tanaka, H. A. Tanaka, A. Teklu, L. F. Thompson, W. Toki, T. Tomura, C. Touramanis, T. Tsukamoto, M. Tzanov, M. A. Uchida, Y. Uchida, M. Vagins, Z. Vallari, N. H. Van, D. Vargas, G. Vasseur, T. Wachala, C. W. Walter, D. Wark, M. O. Wascko, A. Weber, R. Wendell, L. Whitehead, R. J. Wilkes, M. J. Wilking, J. R. Wilson, R. J. Wilson, C. Wret, Y. Yamada, K. Yamamoto, C. Yanagisawa, G. Yang, T. Yano, K. Yasutome, S. Yen, N. Yershov, M. Yokoyama, T. Yoshida, T. Yuan, M. Yu, A. Zalewska, J. Zalipska, L. Zambelli, K. Zaremba, M. Ziembicki, P. Zilberman, E. D. Zimmerman, M. Zito

    In this document, we present the Technical Design Report of the Upgrade of
    the T2K Near Detector ND280. The goal of this upgrade is to improve the Near
    Detector performance to measure the neutrino interaction rate and to constrain
    the neutrino interaction cross-sections so that the uncertainty in the number
    of predicted events at Super-Kamiokande is reduced to about 4%. This will allow
    to improve the physics reach of the T2K-II project. This goal is achieved by
    modifying the upstream part of the detector, adding a new highly granular
    scintillator detector (Super-FGD), two new TPCs (High-Angle TPC) and six TOF
    planes. Details about the detector concepts, design and construction methods
    are presented, as well as a first look at the test-beam data taken in Summer
    2018. An update of the physics studies is also presented.

    2019年01月12日

    機関テクニカルレポート,技術報告書,プレプリント等

  • 青木 茂樹, 高橋 覚, 六條 宏紀

    我々は,世界最高角度分解能(0.08 degree @ 1–2 GeV),世界初偏光有感,世界最大口径面積(~10 m2)を実現するエマルションガンマ線望遠鏡の長時間気球フライト繰り返しによる宇宙高エネルギーガンマ線(10 MeV–100 GeV)精密観測計画GRAINE(Gamma-Ray Astro-Imager with Nuclear Emulsion)を推し進めている。本計画の概要や現状及び展望について紹介する。

    公益社団法人 日本アイソトープ協会, 2019年, RADIOISOTOPES, 68 (12), 877 - 891, 日本語

  • S. Aoki, A. Ariga, T. Ariga, E. Firu, T. Fukuda, Y. Gornushkin, A.M. Guler, M. Haiduc, K. Kodama, M.A. Korkmaz, U. Kose, M. Nakamura, T. Nakano, A.T. Neagu, H. Rokujo, O. Sato, S. Vasina, M. Vladymyrov, M. Yoshimoto

    2017年08月29日, CERN Document Server (Scientific Committee Paper), CERN-SPSC-2017-029, SPSC-P-354, 英語

    機関テクニカルレポート,技術報告書,プレプリント等

  • Proposal for an Extended Run of T2K to $20\times10^{21}$ POT

    K. Abe, H. Aihara, A. Amji, J. Amey, C. Andreopoulos, M. Antonova, S. Aoki, A. Atherton, S. Ban, F. C. T. Barbato, M. Barbi, F. C. T. Barbato, G. J. Barker, G. Barr, P. Bartet-Friburg, M. Batkiewicz, V. Berardi, S. Bhadra, S. Bienstock, A. Blondel, S. Bolognesi, S. Bordoni, S. B. Boyd, D. Brailsford, A. Bravar, C. Bronner, M. Buizza Avanzini, J. Calcutt, R. G. Calland, D. Calvet, T. Campbell, S. Cao, S. L. Cartwright, R. Castillo, M. G. Catanesi, A. Cervera, C. Checchia, D. Cherdack, N. Chikuma, G. Christodoulou, A. Clifton, J. Coleman, G. Collazuol, D. Coplowe, L. Cremonesi, A. Cudd, A. Dabrowska, A. Delbart, G. De Rosa, T. Dealtry, P. F. Denner, S. R. Dennis, C. Densham, D. Dewhurst, F. Di Lodovico, S. Dolan, O. Drapier, K. E. Duffy, J. Dumarchez, M. Dunkman, M. Dziewiecki, S. Emery-Schrenk, P. Fernanddez, T. Feusels, A. J. Finch, G. A. Fiorentini, G. Fiorillo, M. Fitton, M. Friend, Y. Fujii, D. Fukuda, Y. Fukuda, A. Garcia, C. Giganti, F. Gizzarelli, M. Gonin, N. Grant, D. R. Hadley, L. Haegel, M. D. Haigh, D. Hansen, J. Harada, M. Hartz, T. Hasegawa, N. C. Hastings, T. Hayashino, Y. Hayato, T. Hiraki, A. Hiramoto, S. Hirota, M. Hogan, J. Holeczek, F. Hosomi, K. Huang, A. K. Ichikawa, M. Ikeda, J. Imber, J. Insler, R. A. Intonti, T. Ishida, T. Ishii, E. Iwai, K. Iwamoto, A. Izmaylov, B. Jamieson, M. Jiang, S. Johnson, J. H. Jo, P. Jonsson, C. K. Jung, M. Kabirnezhad, A. C. Kaboth, T. Kajita, H. Kakuno, J. Kameda, T. Katori, E. Kearns, M. Khabibullin, A. Khotjantsev, H. Kim, S. King, J. Kisiel, A. Knight, A. Knox, T. Kobayashi, L. Koch, T. Koga, A. Konaka, K. Kondo, L. L. Kormos, A. Korzenev, Y. Koshio, K. L. Kowalik, W. Kropp, Y. Kudenko, R. Kurjata, T. Kutter, L. Labarga, J. Lagoda, I. Lamont, M. Lamoureux, E. Larkin, P. Lasorak, M. Laveder, M. Lawe, T. Lindner, Z. J. Liptak, R. P. Litchfield, X. Li, A. Longhin, J. P. Lopez, T. Lou, L. Ludovici, X. Lu, L. Magaletti, K. Mahn, M. Malek, S. Manly, A. D. Marino, J. F. Martin, P. Martins, S. Martynenko, T. Maruyama, V. Matveev, K. Mavrokoridis, W. Y. Ma, E. Mazzucato, M. McCarthy, N. McCauley, K. S. McFarland, C. McGrew, A. Mefodiev, C. Metelko, M. Mezzetto, P. Mijakowski, A. Minamino, O. Mineev, S. Mine, A. Missert, M. Miura, S. Moriyama, Th. A. Mueller, Y. Nagai, T. Nakadaira, M. Nakahata, K. G. Nakamura, K. Nakamura, K. D. Nakamura, Y. Nakanishi, S. Nakayama, T. Nakaya, K. Nakayoshi, C. Nantais, K. Nishikawa, Y. Nishimura, P. Novella, J. Nowak, H. M. O'Keeffe, R. Ohta, K. Okumura, T. Okusawa, T. Ovsyannikova, R. A. Owen, Y. Oyama, V. Palladino, J. L. Palomino, V. Paolone, W. Parker, N. D. Patel, M. Pavin, D. Payne, J. D. Perkin, L. Pickard, L. Pickering, E. S. Pinzon Guerra, B. Popov, M. Posiadala-Zezula, J. -M. Poutissou, R. Poutissou, P. Przewlocki, B. Quilain, T. Radermacher, E. Radicioni, P. N. Ratoff, M. Ravonel, M. A. Rayner, E. Reinherz-Aronis, C. Riccio, P. Rojas, E. Rondio, B. Rossi, S. Roth, A. C. Ruggeri, A. Rychter, R. Sacco, K. Sakashita, F. Sánchez, E. Scantamburlo, K. Scholberg, J. Schwehr, M. Scott, Y. Seiya, T. Sekiguchi, H. Sekiya, D. Sgalaberna, R. Shah, A. Shaikhiev, F. Shaker, D. Shaw, M. Shiozawa, T. Shirahige, S. Short, M. Smy, J. T. Sobczyk, H. Sobel, L. Southwell, J. Steinmann, T. Stewart, P. Stowell, Y. Suda, S. Suvorov, A. Suzuki, S. Y. Suzuki, Y. Suzuki, M. Szeptycka, R. Tacik, M. Tada, A. Takeda, Y. Takeuchi, R. Tamura, H. K. Tanaka, H. A. Tanaka, D. Terhorst, R. Terri, T. Thakore, L. F. Thompson, W. Toki, T. Tomura, C. Touramanis, T. Tsukamoto, M. Tzanov, M. A. Uchida, Y. Uchida, M. Vagins, A. Vacheret, Z. Vallari, G. Vasseur, T. Wachala, C. W. Walter, D. Wark, M. O. Wascko, A. Weber, R. Wendell, R. J. Wilkes, M. J. Wilking, J. R. Wilson, R. J. Wilson, C. Wret, Y. Yamada, K. Yamamoto, M. Yamamoto, C. Yanagisawa, T. Yano, S. Yen, N. Yershov, M. Yokoyama, J. Yoo, K. Yoshida, T. Yuan, M. Yu, A. Zalewska, J. Zalipska, L. Zambelli, K. Zaremba, M. Ziembicki, E. D. Zimmerman, M. Zito

    Recent measurements by the T2K neutrino oscillation experiment indicate that
    CP violation in neutrino mixing may be observed in the future by long-baseline
    neutrino oscillation experiments. We propose an extension to the currently
    approved T2K running from $7.8\times 10^{21}~\mbox{POT}$ to $20\times
    10^{21}~\mbox{POT}$, aiming at initial observation of CP violation with
    3$\,\sigma$ or higher significance for the case of maximum CP violation. The
    program also contains a measurement of mixing parameters, $\theta_{23}$ and
    $\Delta m^2_{32}$, with a precision of 1.7$^\circ$ or better and 1%,
    respectively. With accelerator and beamline upgrades, as well as analysis
    improvements, this program would occur before the next generation of
    long-baseline neutrino oscillation experiments that are expected to start
    operation in 2026.

    2016年09月14日

    機関テクニカルレポート,技術報告書,プレプリント等

  • Sensitivity of the T2K accelerator-based neutrino experiment with an Extended run to $20\times10^{21}$ POT

    K. Abe, C. Andreopoulos, M. Antonova, S. Aoki, A. Ariga, D. Autiero, S. Ban, M. Barbi, G. J. Barker, G. Barr, P. Bartet-Friburg, M. Batkiewicz, V. Berardi, S. Berkman, S. Bhadra, S. Bienstock, A. Blondel, S. Bolognesi, S. Bordoni, S. B. Boyd, D. Brailsford, A. Bravar, C. Bronner, M. Buizza Avanzini, R. G. Calland, T. Campbell, S. Cao, S. L. Cartwright, R. Castillo, M. G. Catanesi, A. Cervera, D. Cherdack, N. Chikuma, G. Christodoulou, A. Clifton, J. Coleman, G. Collazuol, D. Coplowe, L. Cremonesi, A. Dabrowska, G. De Rosa, T. Dealtry, P. F. Denner, S. R. Dennis, C. Densham, D. Dewhurst, F. Di Lodovico, S. Di Luise, S. Dolan, O. Drapier, K. E. Duffy, J. Dumarchez, M. Dziewiecki, S. Emery-Schrenk, A. Ereditato, T. Feusels, A. J. Finch, G. A. Fiorentini, M. Friend, Y. Fujii, D. Fukuda, Y. Fukuda, A. P. Furmanski, V. Galymov, A. Garcia, C. Giganti, F. Gizzarelli, M. Gonin, N. Grant, D. R. Hadley, L. Haegel, M. D. Haigh, D. Hansen, J. Harada, M. Hartz, T. Hasegawa, N. C. Hastings, T. Hayashino, Y. Hayato, R. L. Helmer, M. Hierholzer, A. Hillairet, T. Hiraki, A. Hiramoto, S. Hirota, M. Hogan, J. Holeczek, F. Hosomi, K. Huang, A. K. Ichikawa, M. Ikeda, J. Imber, J. Insler, R. A. Intonti, T. Ishida, T. Ishii, E. Iwai, K. Iwamoto, A. Izmaylov, B. Jamieson, M. Jiang, S. Johnson, J. H. Jo, P. Jonsson, C. K. Jung, M. Kabirnezhad, A. C. Kaboth, T. Kajita, H. Kakuno, J. Kameda, D. Karlen, I. Karpikov, T. Katori, E. Kearns, M. Khabibullin, A. Khotjantsev, H. Kim, J. Kim, S. King, J. Kisiel, A. Knight, A. Knox, T. Kobayashi, L. Koch, T. Koga, A. Konaka, K. Kondo, A. Kopylov, L. L. Kormos, A. Korzenev, Y. Koshio, W. Kropp, Y. Kudenko, R. Kurjata, T. Kutter, J. Lagoda, I. Lamont, M. Lamoureux, E. Larkin, P. Lasorak, M. Laveder, M. Lawe, T. Lindner, Z. J. Liptak, R. P. Litchfield, X. Li, A. Longhin, J. P. Lopez, T. Lou, L. Ludovici, X. Lu, L. Magaletti, K. Mahn, M. Malek, S. Manly, A. D. Marino, J. F. Martin, P. Martins, S. Martynenko, T. Maruyama, V. Matveev, K. Mavrokoridis, W. Y. Ma, E. Mazzucato, M. McCarthy, N. McCauley, K. S. McFarland, C. McGrew, A. Mefodiev, C. Metelko, M. Mezzetto, P. Mijakowski, A. Minamino, O. Mineev, S. Mine, A. Missert, M. Miura, S. Moriyama, Th. A. Mueller, J. Myslik, T. Nakadaira, M. Nakahata, K. G. Nakamura, K. Nakamura, K. D. Nakamura, Y. Nakanishi, S. Nakayama, T. Nakaya, K. Nakayoshi, C. Nantais, C. Nielsen, M. Nirkko, K. Nishikawa, Y. Nishimura, P. Novella, J. Nowak, H. M. O'Keeffe, R. Ohta, K. Okumura, T. Okusawa, W. Oryszczak, S. M. Oser, T. Ovsyannikova, R. A. Owen, Y. Oyama, V. Palladino, J. L. Palomino, V. Paolone, N. D. Patel, M. Pavin, D. Payne, J. D. Perkin, Y. Petrov, L. Pickard, L. Pickering, E. S. Pinzon Guerra, C. Pistillo, B. Popov, M. Posiadala-Zezula, J. -M. Poutissou, R. Poutissou, P. Przewlocki, B. Quilain, T. Radermacher, E. Radicioni, P. N. Ratoff, M. Ravonel, M. A. M. Rayner, A. Redij, E. Reinherz-Aronis, C. Riccio, P. Rojas, E. Rondio, S. Roth, A. Rubbia, A. Rychter, R. Sacco, K. Sakashita, F. Sánchez, E. Scantamburlo, K. Scholberg, J. Schwehr, M. Scott, Y. Seiya, T. Sekiguchi, H. Sekiya, D. Sgalaberna, R. Shah, A. Shaikhiev, F. Shaker, D. Shaw, M. Shiozawa, T. Shirahige, S. Short, M. Smy, J. T. Sobczyk, H. Sobel, M. Sorel, L. Southwell, J. Steinmann, T. Stewart, P. Stowell, Y. Suda, S. Suvorov, A. Suzuki, S. Y. Suzuki, Y. Suzuki, R. Tacik, M. Tada, A. Takeda, Y. Takeuchi, H. K. Tanaka, H. A. Tanaka, D. Terhorst, R. Terri, T. Thakore, L. F. Thompson, S. Tobayama, W. Toki, T. Tomura, C. Touramanis, T. Tsukamoto, M. Tzanov, Y. Uchida, M. Vagins, Z. Vallari, G. Vasseur, T. Wachala, C. W. Walter, D. Wark, W. Warzycha, M. O. Wascko, A. Weber, R. Wendell, R. J. Wilkes, M. J. Wilking, C. Wilkinson, J. R. Wilson, R. J. Wilson, Y. Yamada, K. Yamamoto, M. Yamamoto, C. Yanagisawa, T. Yano, S. Yen, N. Yershov, M. Yokoyama, J. Yoo, K. Yoshida, T. Yuan, M. Yu, A. Zalewska, J. Zalipska, L. Zambelli, K. Zaremba, M. Ziembicki, E. D. Zimmerman, M. Zito, J. Żmuda

    Recent measurements at the T2K experiment indicate that CP violation in
    neutrino mixing may be observed in the future by long-baseline neutrino
    oscillation experiments. We explore the physics program of an extension to the
    currently approved T2K running of $7.8\times 10^{21}$ protons-on-target to
    $20\times 10^{21}$ protons-on-target,aiming at initial observation of CP
    violation with 3$\,\sigma$ or higher significance for the case of maximum CP
    violation. With accelerator and beam line upgrades, as well as analysis
    improvements, this program would occur before the next generation of
    long-baseline neutrino oscillation experiments that are expected to start
    operation in 2026.

    2016年07月27日

    機関テクニカルレポート,技術報告書,プレプリント等

  • N. Agafonova, A. Aleksandrov, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, T. Asada, D. Autiero, A. Badertscher, A. Ben Dhahbi, D. Bender, A. Bertolin, C. Bozza, R. Brugnera, G. Brunetti, B. Buettner, S. Buontempo, L. Chaussard, M. Chernyavskiy, V. Chiarella, A. Chukanov, L. Consiglio, N. D'Ambrosio, P. Del Amo Sanchez, G. De Lellis, M. De Serio, A. Di Crescenzo, D. Di Ferdinando, N. Di Marco, S. Dmitrievski, M. Dracos, D. Duchesneau, S. Dusini, J. Ebert, A. Ereditato, J. Favier, T. Ferber, R. A. Fini, T. Fukuda, A. Garfagnini, G. Giacomelli, C. Goellnitz, J. Goldberg, Y. Gornushkin, G. Grella, F. Grianti, A. M. Guler, C. Gustavino, C. Hagner, K. Hakamata, T. Hara, T. Hayakawa, M. Hierholzer, A. Hollnagel, B. Hosseini, H. Ishida, K. Ishiguro, M. Ishikawa, K. Jakovcic, C. Jollet, C. Kamiscioglu, M. Kamiscioglu, T. Katsuragawa, H. Kawahara, J. Kawada, J. H. Kim, S. H. Kim, M. Kimura, N. Kitagawa, B. Klicek, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, A. Lauria, J. Lenkeit, A. Ljubicic, A. Longhin, P. Loverre, A. Malgin, G. Mandrioli, J. Marteau, T. Matsuo, V. Matveev, N. Mauri, E. Medinaceli, A. Meregaglia, P. Migliozzi, S. Mikado, A. Minotti, M. Miyanishi, E. Miyashita, P. Monacelli, M. C. Montesi, K. Morishima, M. T. Muciaccia, N. Naganawa, T. Naka, M. Nakamura, T. Nakano, Y. Nakatsuka, K. Niwa, S. Ogawa, N. Okateva, A. Olshevsky, T. Omura, K. Ozaki, A. Paoloni, B. D. Park, I. G. Park, A. Pastore, L. Patrizii, E. Pennacchio, H. Pessard, C. Pistillo, D. Podgrudkov, N. Polukhina, M. Pozzato, K. Pretzl, F. Pupilli, R. Rescigno, M. Roda, T. Roganova, H. Rokujo, G. Rosa, I. Rostovtseva, A. Rubbia, A. Russo, O. Ryazhskaya, O. Sato, Y. Sato, A. Schembri, W. Schmidt-Parzefall, I. Shakiryanova, T. Schcedrina, A. Sheshukov, H. Shibuya, T. Shiraishi, G. Shoziyoev, S. Simone, M. Sioli, C. Sirignano, G. Sirri, M. Spinetti, L. Stanco, N. Starkov, S. M. Stellacci, M. Stipcevic, T. Strauss, P. Strolin, K. Suzuki, S. Takahashi, M. Tenti, F. Terranova, V. Tioukov, P. Tolun, S. Tufanli, P. Vilain, M. Vladimirov, L. Votano, J. L. Vuilleumier, G. Wilquet, B. Wonsak, C. S. Yoon, J. Yoshida, M. Yoshimoto, Y. Zaitsev, S. Zemskova, A. Zghiche

    SPRINGER, 2014年04月, JOURNAL OF HIGH ENERGY PHYSICS, (4), 英語

    その他

  • A. Izmaylov, S. Aoki, J. Blocki, J. Brinson, A. Dabrowska, I. Danko, M. Dziewiecki, B. Ellison, L. Golyshkin, R. Gould, T. Hara, B. Hartfiel, J. Holeczek, M. Khabibullin, A. Khotjantsev, D. Kielczewska, J. Kisiel, T. Kozlowski, Yu. Kudenko, R. Kurjata, T. Kutter, J. Lagoda, J. Liu, J. Marzec, W. Metcalf, P. Mijakowski, O. Mineev, Yu. Musienko, D. Naples, M. Nauman, D. Northacker, J. Nowak, V. Paolone, M. Posiadala, P. Przewlocki, J. Reid, E. Rondio, A. Shaykhiev, M. Sienkiewicz, D. Smith, J. Sobczyk, M. Stodulski, A. Straczek, R. Sulej, A. Suzuki, J. Swierblewski, T. Szeglowski, M. Szeptycka, T. Wachala, D. Warner, N. Yershov, T. Yano, A. Zalewska, K. Zaremba, M. Ziembicki

    The T2K neutrino experiment at J-PARC uses a set of near detectors to measure the properties of an unoscillated neutrino beam and neutrino interaction cross-sections. One of the sub-detectors of the near-detector complex, the side muon range detector (SMRD), is described in the paper. The detector is designed to help measure the neutrino energy spectrum, to identify background and to calibrate the other detectors. The active elements of the SMRD consist of 0.7 cm thick extruded scintillator slabs inserted into air gaps of the UA1 magnet yokes. The readout of each scintillator slab is provided through a single WLS fiber embedded into a serpentine-shaped groove. Two Hamamatsu multi-pixel avalanche photodiodes (MPPC's) are coupled to both ends of the WLS fiber. This design allows us to achieve a high MIP detection efficiency of greater than 99%. A light yield of 25-50 p.e./MIP, a time resolution of about ins and a spatial resolution along the slab better than 10 cm were obtained for the SMRD counters. (C) 2010 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2010年11月, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 623 (1), 382 - 384, 英語

  • 医療用炭素ビームの核破砕反応

    歳藤利行, 児玉康一, 遊佐顕, 尾崎正伸, 尼子勝哉, 亀岡覚, 村上晃一, 佐々木節, 青木茂樹, 福田努, 久保田寛隆, 長縄直崇, 夏目光教, 丹羽公雄, 高橋覚, 吉田純也, 吉田肇, 兼松伸幸, 小森雅孝, 浅井慎, 小井辰巳, 福島知佳, 小川了, 渋谷寛

    2007年03月27日, 応用物理学関係連合講演会講演予稿集, 54th (1), 151, 日本語

  • First observation of the ΣN decay of the S = - 2 system.

    Watanabe T, Ahn J.K, Akikawa H, Aoki S, Arai K

    An event emitting a Sigma(-)-hyperon froin a Xi(-)-hyperon nuclear capture at rest has been observed in a hybrid-emulsion experiment. The event has been analyzed as the first observation of the weak decay of the S=-2 system.

    SPRINGER-VERLAG BERLIN, 2007年, Eur. Phys. J. A, Vol. 33, No. 3, pp. 265-268, 113 - +, 英語

  • 宇宙・医療分野へのエマルションチェンバー技術の応用のための研究

    丹羽公雄, 歳藤利行, 福田努, 久保田寛隆, 中村琢, 夏目光教, 伴尊行, 長縄直崇, 高橋覚, 渋谷寛, 小川了, 柴崎昌紀, 福島知佳, 青木茂樹, 児玉康一, 兼松伸幸, 小森雅孝, 遊佐顕, 尼子勝哉, 亀岡覚, 村上晃一, 佐々木節, 尾崎正伸, 国分紀秀

    2006年05月, NIRS-M (National Inst. of Radiological Sciences), (192), 196 - 197, 日本語

  • K. Kodama, Y. Nonoyama, T. Kobayashi, K. Satoh, J. S. Song, J. Nishimura, Y. Saito, T. Yamagami, S. Aoki, M. Hara, T. Hara, J. Kirimura, A. Ariga, T. Ban, T. Fukuda, S. Hiramatsu, K. Hoshino, J. Kawada, N. Koike, M. Komatsu, S. Miyamoto, M. Miyanishi, N. Naganawa, M. Nakamura, T. Nakamura, T. Nakano, K. Narita, M. Natsume, K. Niwa, N. Nonaka, B. D. Park, O. Sato, S. Takahashi, T. Toshito, R. Ohmori, Y. Sato, I. Tezuka

    The Emulsion Cloud Chamber (ECC) has played important role for the cosmic-ray research. The Micro Segment Chamber (MSC) is a new generation detector evolved from the ECC, which has maximized and extended advantages of ECCs as well as overcome difficulties in the analysis of the events that occur inside the detector. The essential parts of MSC and its application to a balloon experiment for cosmic-ray electron observations are described. (c) 2006 Published by Elsevier Ltd on behalf of COSPAR.

    ELSEVIER SCIENCE LTD, 2006年, NEXT GENERATION OF SCIENTIFIC BALLOON MISSIONS, 37 (11), 2120 - 2124, 英語

  • 宇宙・医療分野へのエマルションチェンバー技術の応用のための研究

    丹羽公雄, 歳藤利行, 中村琢, 夏目光教, 伴尊行, 長縄直崇, 高橋覚, 渋谷寛, 小川了, 柴崎昌紀, 福島知佳, 青木茂樹, 児玉康一, 兼松伸幸, 小森雅孝, 遊佐顕, 尼子勝哉, 村上晃一, 佐々木節, 尾崎正伸, 国分紀秀

    2005年05月, NIRS-M (National Inst. of Radiological Sciences), (180), 226 - 227, 日本語

  • 柴崎 昌紀, 長縄 直崇, 高橋 覚, 兼松 伸幸, 小森 雅孝, 小井 辰巳, 遊佐 顕, 村上 晃一, 尼子 勝哉, 佐々木 節, 尾崎 正仲, 渋谷 寛, 国分 紀秀, 青木 茂樹, 児玉 康一, 吉田 肇, 浅井 慎, 田中 覚, 小川 了, 福島 知佳, 丹羽 公雄, 歳藤 利行, 中野 敏行, 中村 琢, 伴 尊行

    一般社団法人 日本物理学会, 2005年, 日本物理学会講演概要集, 60 (0), 81 - 81, 日本語

  • K Nitta, E Aliu, S Andringa, S Aoki, S Choi, U Dore, Espinal, X, JJ Gomez-Cadenas, R Gran, M Hasegawa, K Hayashi, K Hayashi, Y Hayato, K Hiraide, AK Ichikawa, M Iinuma, JS Jang, EJ Jeon, KK Joo, CK Jung, Kato, I, D Kerr, JY Kim, SB Kim, K Kobayashi, A Kohara, J Kubota, Y Kudenko, Y Kuno, MJ Lee, E Lessac-Chenin, IT Lim, PF Loverre, L Ludovici, H Maesaka, C Mariani, C McGrew, O Mineev, T Morita, T Murakami, Y Nakanishi, T Nakaya, S Nawang, K Nishikawa, MY Pac, EJ Rhee, A Rodriguez, F Sanchez, T Sasaki, KK Shiraishi, A Suzuki, T Takahashi, Y Takubo, M Tanaka, R Terri, A Tornero-Lopez, S Ueda, RJ Wilkes, S Yamamoto, M Yokoyama, M Yoshida

    A new near detector, Scintillator Bar (SciBar), for the K2K long-baseline neutrino oscillation experiment was installed to improve the measurement of the neutrino energy spectrum and to study neutrino interactions in the energy region around 1 GeV. SciBar is a 'fully active' tracking detector with fine segmentation consisting of plastic scintillator bars. The detector was constructed in the summer of 2003 and is taking data since October 2003. The basic design and initial performance are presented. (C) 2004 Published by Elsevier B.V.

    ELSEVIER SCIENCE BV, 2004年12月, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 535 (1-2), 147 - 151, 英語

  • 柴崎 昌紀, 長縄 直崇, 高橋 覚, 兼松 伸幸, 小森 雅孝, 小井 辰巳, 遊佐 顕, 村上 晃一, 尼子 勝哉, 佐々木 節, 尾崎 正伸, 渋谷 寛, 国分 紀秀, 青木 茂樹, 児玉 康一, 吉田 肇, 浅井 慎, 田中 覚, 小川 了, 福島 知佳, 丹羽 公雄, 歳藤 利行, 中野 敏行, 中村 琢, 伴 尊行

    一般社団法人 日本物理学会, 2004年, 日本物理学会講演概要集, 59 (0), 54 - 54, 日本語

  • Design, construction, and initial performance of SciBar detector in K2K experiment

    S Yamamoto

    A new near detector in K2K long baseline neutrino ;experiment, the SciBar, was constructed and started data taking to study neutrino interactions. In K2K, neutrino oscillation is studied by comparing the number of neutrino interactions and energy spectrum between near and far detectors. In order to study neutrino oscillation more precisely, it is necessary to improve the measurement of neutrino spectrum and interaction below 1 GeV, where the latest K2K results suggest maximum oscillation. For that purpose, SciBar is designed to be fully active with fine segmentation. We present the design and basic performance. All detector components have been working as expected. Also presented are the measurements of charged current interactions which are used in the latest K2K oscillation analysis.

    IEEE, 2004年, 2004 IEEE Nuclear Science Symposium Conference Record, Vols 1-7, Vol. 52, No. 6, pp. 2992-2997, 1034 - 1038, 英語

  • Takahashi H, Ahn J.K, Akikawa H, Aoki S, Arai K

    A hybrid-emulsion experiment has been carried out at KEK-PS to study S = -2 nuclei. With the analysis of about 35 % of total emulsion, we have successfully found three events of sequential weak decay of a double-hypernucleus. The results of these E373 events are summarized together with those of past experiments. The first experimental study of the branching ratios of weak decay modes of double-hypernuclei has been performed.

    ELSEVIER SCIENCE BV, 2003年06月, Nuclear Physics A., 721, 951C - 954C, 英語

  • Study of double-strangeness nuclei with hybrid-emulsion Method(KEK-PS E373)

    A Ichikawa, JK Ahn, H Akikawa, S Aoki, K Arai, SY Bahk, KM Baik, B Bassalleck, JH Chung, MS Chung, K Hoshino, M Ieiri, K Imai, YH Iwata, YS Iwata, H Kanda, M Kaneko, T Kawai, CO Kim, JY Kim, SJ Kim, SH Kim, Y Kondo, T Kouketsu, YL Lee, JWC McNabb, M Mitsuhara, Y Nagase, C Nagoshi, K Nakazawa, H Noumi, S Ogawa, H Okabe, K Oyama, HM Park, IG Park, J Parker, YS Ra, JT Rhee, A Rusek, H Shibuya, KS Sim, PK Saba, D Seki, M Sekimoto, JS Song, H Takahashi, T Takahashi, F Takeutchi, H Tanaka, K Tanida, J Tojo, H Torii, S Torikai, N Ushida, K Yamamoto, N Yasuda, JT Yang, CJ Yoon, CS Yoon, M Yosoi, T Yoshida, L Zhu

    ELSEVIER SCIENCE BV, 2001年08月, NUCLEAR PHYSICS A, 691 (1-2), 246C - 249C, 英語

  • Doubly strange nuclei by a hybrid-emulsion experiment E373 at KEK

    JK Ahn, Y Akaishi, H Akikawa, S Aoki, K Arai, SY Bahk, M Baik, B Bassalleck, JH Chung, MS Chung, DH Davis, GB Franklin, T Fukuda, K Hoshino, A Ichikawa, M Ieiri, K Imai, YH Iwata, YS Iwata, K Kanda, M Kaneko, T Kawai, CO Kim, JY Kim, SJ Kim, SH Kim, Y Kondo, T Kouketsu, YL Lee, JWC McNabb, M Mitsuhara, T Motoba, Y Nagase, C Nagoshi, K Nakazawa, H Noumi, S Ogawa, H Okabe, K Oyama, HM Park, IG Park, J Parker, YS Ra, JT Rhee, A Rusek, H Shibuya, KS Sim, PK Saha, D Seki, M Sekimoto, JS Song, H Takahashi, T Takahashi, F Takeutchi, H Tanaka, K Tanida, J Tojo, H Torii, S Torikai, DN Tovee, N Ushida, K Yamamoto, Y Yamamoto, N Yasuda, JT Yang, CJ Yoon, CS Yoon, M Yosoi, T Yoshida, L Zhu

    A hybrid emulsion experiment E373 at KEK has been carried out to study doubly strange nuclear system. By the 8% data analysis of all, one twin single-Lambda hypernuclei event and two events of double-Lambda hypernucleus have been successfully detected. The twin single-Lambda event is uniquely interpreted as Xi(-) + N-14 --> He-5(Lambda)+ He-4 + n for the first time. In the first double-Lambda hypernucleus event, "Demachi-Yanagi", it is interpreted as Xi(-) + C-12 --> Be-10(LambdaLambda)(or Be-10(LambdaLambda)*)+t. The second double-Lambda hypernucleus event, "NAGARA", shows a clearly recognized topology and the interpretation is unique as Xi(-) + C-12 --> He-6(LambdaLambda)+ He-4+t, He-6(LambdaLambda) --> (5)(Lambda)Hepi(-) +p, He-5(Lambda) --> p+d+2n etc. By the preliminary result of the He-6(LambdaLambda), the attractive LambdaLambda interaction has been confirmed with the DeltaB(LambdaLambda) similar to 1 MeV.

    AMER INST PHYSICS, 2001年, HADRONS AND NUCLEI, 594, 180 - 188, 英語

  • Design, construction, and operation of SciFi tracking detector for K2K experiment

    A Suzuki, H Park, S Aoki, S Echigo, K Fujii, T Hara, T Iwashita, M Kitamura, M Kohama, G Kume, M Onchi, T Otaki, K Sato, M Takatsuki, K Takenaka, Y Tanaka, K Tashiro, T Inagaki, Kato, I, S Mukai, T Nakaya, K Nishikawa, N Sasao, A Shima, H Yokoyama, T Chikamatsu, Y Hayato, T Ishida, T Ishii, H Ishino, EJ Jeon, T Kobayashi, SB Lee, K Nakamura, Y Oyama, A Sakai, M Sakuda, Tumakov, V, S Fukuda, Y Fukuda, M Ishizuka, Y Itow, T Kajita, J Kameda, K Kaneyuki, K Kobayashi, Y Kobayashi, Y Koshio, M Miura, S Moriyama, M Nakahata, S Nakayama, Y Obayashi, A Okada, N Sakurai, M Shiozawa, Y Suzuki, H Takeuchi, Y Takeuchi, Y Totsuka, T Toshito, S Yamada, K Miyano, M Nakamura, N Tamura, Nakano, I, M Yoshida, T Kadowaki, S Kishi, H Yokoyama, T Maruyama, M Etoh, K Nishijima, HC Bhang, BH Khang, BJ Kim, HI Kim, JH Kim, SB Kim, H So, JH Yoo, JH Choi, HI Jang, JS Jang, JY Kim, IT Lim, MY Pac, E Kearns, K Scholberg, JL Stone, LR Sulak, CW Walter, D Casper, W Gajewski, W Kropp, S Mine, H Sobel, M Vagins, S Matsuno, J Hill, CK Jung, K Martens, C Mauger, C McGrew, E Sharkey, C Yanagisawa, H Berns, S Boyd, J Wilkes, D Kielczewska, U Golebiewska

    We describe the construction and performance of a scintillating fiber detector used in the near detector for the K2K (KEK to Kamioka, KEK E362) long baseline neutrino oscillation experiment. The detector uses 3.7 m long and 0.692 mm diameter scintillating fiber coupled to image-intensifier tubes (IIT), and a CCD camera readout system. Fiber sheet production and detector construction beg-an in 1997, and the detector was commissioned in March 1999. Results from the first K2K runs confirm good initial performance: position resolution is estimated to be about 0.8 mm, and track finding efficiency is 98 +/- 2% for long tracks (i.e., those which intersect more than 5 fiber planes). The hit efficiency was estimated to be 92 +/- 2% using cosmic-ray muons, after noise reduction at the offline stage. The possibility of using the detector for particle identification is also discussed. (C) 2000 Published by Elsevier Science B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2000年10月, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 453 (1-2), 165 - 176, 英語

  • ダブルハイパー核探査実験(KEK‐PS E373)

    高橋仁, 青木茂樹, 牛田憲行, 岡部久高, 金子昌史, 渋谷寛, 竹内富士雄, 福田共和, 吉田拓生

    1999年03月15日, 日本物理学会講演概要集, 54 (1), 56, 日本語

  • Enhanced Production of ΛΛ Pairs Near Threshold in the (K-, K+) Reaction on 12C.

    Ahn J.K, Aoki S, Chung K.S, Chung M.S, En-yo H

    Enhanced production of Lambda Lambda pairs, above the prediction of a two-step process model, is observed near threshold (around the masses of 2.23 - 2.26 GeV/c(2)) in the C-12(K-,K+) reaction at p(K-) = 1.66 GeV/c using a scintillating fiber target. The differential cross section for the Lambda Lambda production averaged over 2.3 degrees less than or equal to theta(K+) less than or equal to 14.7 degrees in the momentum region 0.95 less than or equal to p(K+) less than or equal to 1.3 GeV/c was found to be 7.6 +/- 1.3 mu b/sr, and that for the enhancement approximately 3 mu b/sr.

    ELSEVIER SCIENCE BV, 1998年08月, Nuclear Physics A., 639 (1-2), 379C - 384C, 英語

  • 田中 英之, 神田 浩樹, 近藤 泰弘, 高橋 仁, 東城 順治, 鳥井 久行, 中澤 和馬, 西田 英明, PARK H.M, 星野 香, 山本 和弘, 青木 茂樹, 吉田 拓生, RA Y.S, 市川 温子, 今井 憲一, 岩田 行弘, 牛田 憲行, 大山 勝敏, 金子 昌史, 河合 利秀

    一般社団法人 日本物理学会, 1998年, 日本物理学会講演概要集, 53 (0), 53 - 53, 日本語

  • 鳥井 久行, 近藤 恭弘, 高橋 俊行, 高橋 仁, 田中 英之, 東城 順治, 中澤 和馬, PARK H.M, 山本 和弘, 吉田 拓生, 與曽井 優, 青木 茂樹, RA Y.S, 秋川 藤志, AHN J.K, 市川 温子, 今井 憲一, 大山 勝敏, 金子 昌史, 神田 浩樹

    一般社団法人 日本物理学会, 1998年, 日本物理学会講演概要集, 53 (0), 53 - 53, 日本語

  • S. Aoki, V. Bisi, A. C. Breslin, F. Cassol, M. G. Catanesi, D. H. Davis, A. di Bartolomeo, S. di Liberto, M. J. Esten, P. Giubellino, G. Grella, K. Hoshino, M. Kazuno, M. Kobayashi, K. Kodama, S. Lusso, A. Marzari-Chiesa, M. Masera, F. Meddi, M. Miyanishi, M. T. Muciaccia, S. Nakanishi, K. Nakazawa, K. Niu, K. Niwa, M. Nomura, G. Poulard, L. Ramello, L. Riccati, G. Romano, G. Rosa, M. S. Sartori, C. Sgarbi, H. Shibuya, S. Simone, H. Tajima, D. N. Tovee, N. Ushida, T. Virgili

    Interactions induced by 200 GeV per nucleon32S ions on heavy targets were selected by the HELIOS calorimeters and studied in nuclear emulsions. Global observables, such as charged particle multiplicity and transverse energy, were determined event-by-event. Multiplicity and transverse energy were measured as a function of the pseudorapidity over the large acceptance of the present experiment (0.6≤η≤5.5). A comparison of the experimental data with those provided by the event generators FRITIOF and VENUS shows remarkable differences both in the target spectator region and in the participant region. An attempt is made to interpret these discrepancies in terms of plausible mechanisms, like baryon-pair production or rescattering. © 1995 Società Italiana di Fisica.

    Società Italiana di Fisica, 1995年09月, Il Nuovo Cimento A, 108 (9), 1125 - 1141, 英語

  • E ARIK, N ARMENISE, S AOKI, A ARTAMONOV, R BEYER, J BRUNNER, S BUONTEMPO, MG CATANESI, H CHIKAWA, KS CHUNG, A COCCO, A CAPONE, M DEJONG, D DEPEDIS, E DICAPUA, S DILIBERTO, U DORE, A EREDITATO, E ESKUT, JP FABRE, D FAVART, R FERREIRA, G FIORILLO, W FLEGEL, D FREKERS, P GORBUNOV, G GREGOIRE, G GRELLA, M GRUWE, CH HAHN, T HARA, K HOEPFNER, K HOSHINO, M KAZUNO, JY KIM, M KOBAYASHI, K KODAMA, J KONIJN, KHOVANSKY, V, LAUWERYS, X, LEMAITRE, V, P LENDERMANN, IT LIM, C LUPPI, PF LOVERRE, D MACINA, AA MAILOV, F MARCHETTISTASI, MA MAZZONI, F MEDDI, RM DREES, L MICHEL, P MIGLIOZZI, C MOMMAERT, MT MUCIACCIA, K NAKAMURA, M NAKAMURA, Y NAKAMURA, T NAKANO, K NAKAZAWA, K NIU, K NIWA, T OKUSAWA, G ONENGUT, H OVERAS, PALLADINO, V, J PANMAN, IG PARK, T PATZAK, E PESEN, G PIREDDA, F RICCARDI, S RICCIARDI, G ROMANO, D RONDESHAGEN, G ROSA, A ROZANOV, B SAITTA, R SANTACESARIA, O SATO, Y SATO, M SERINZEYREK, R SEVER, SHAMANOV, V, H SHIBUYA, S SIMONE, SMIRNITSKY, V, JS SONG, G STEFANINI, P STROLIN, M TERANAKA, TEZUKA, I, P TOLUN, N USHIDA, CAFJ VANDERPOEL, P VILAIN, JL VISSCHERS, G WILQUET, K WINTER, H WONG, MT ZEYREK, P ZUCCHELLI

    The WA95/CHORUS experiment at CERN is a dedicated nu(mu)-nu(tau) oscillation search experiment. Using the wide band neutrino beam of the CERN-SPS accelerator, with an exposure of 2.4 X 10(19) protons on the target, this experiment will explore the domain of small mixing angles down to sin(2) 2 theta(mu tau) approximate to 3 X 10(-4) for mass differences Delta m(2) > 1 eV(2), more than one order of magnitude better than the current limits. The conceptual design of the CHORUS experiment and data on the detector performances are reported.

    ELSEVIER SCIENCE BV, 1995年06月, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 360 (1-2), 254 - 257, 英語

  • T. Åkesson, S. Almehed, A.L.S. Angelis, S. Aoki, N. Armenise, H. Atherton, P. Aubry, G. Baroni, H.W. Bartels, G. Beaudoin, J.M. Beaulieu, H. Beker, O. Benary, D. Bettoni, V. Bisi, I. Blevis, H. Bøggild, A.C. Breslin, P. Cerello, W. Cleland, M. Clemen, B. Collick, F. Corriveau, S. Dagan, D.H. Davis, K. Dederichs, S. Dell'Uomo, P. Depommier, R.C.E. Devenish, N. DiGiacomo, S. Di Liberto, J.R. Dodd, B. Dolgoshein, A. Drees, H. En'yo, B. Erlandsson, M.J. Esten, C.W. Fabjan, P. Fischer, Z. Fraenkel, A. Gaidot, P. Giubellino, P. Glassel, U. Goerlach, G. Grella, R. Haglund, L.A. Hamel, H. van Hecke, V. Hedberg, R. Heifetz, A. Holscher, K. Hoshino, T. Ishigami, B. Jacak, G. Jarlskog, S. Johansson, M. Kazuno, H. Kitamura, M. Kobayashi, Y. Kobayashi, K. Kodama, H. Kraner, V. Kroh, F. Lamarche, C. Leroy, D. Lissauer, G. London, B. Lorstad, A. Lounis, A. Marzari-Chiesa, M. Masera, M.A. Mazzoni, E. Mazzucato, M.L. McCubbin, N.A. McCubbin, P. McGaughey, F. Meddi, M. Miyanishi, U. Mjornmark, M.T. Muciaccia, S. Muraviev, M. Murray, M. Nakamura, S. Nakanishi, K. Nakazawa, M. Neubert, S. Nilsson, K. Niu, K. Niwa, M. Nomura, L. Olsen, Y. Oren, J.P. Pansart, Y.M. Park, A. Pfeiffer, F. Piuz, V. Polychronakos, G. Poulard, M. Price, D. Rahm, L. Ramello, G. Romano, G. Rosa, L. Sandor, S. Sartori, J. Schukraft, M. Sekimoto, B. Sellden, M. Seman, H. Shibuya, A. Shmeleva, V. Sidorov, S. Simone, Y. Sirois, H. Sletten, S. Smirnov, J. Soltani, W. Sondheim, H.J. Specht, I. Stumer, J. Sunier, H. Tajima, H.H. Thodberg, J. Thompson, V. Tikhomirov, D.N. Tovee, I. Tserruya, K. Tsukagoshi, Y. Umezawa, N. Ushida, G. Vasseur, R. Veenhof, S. Watanabe, R. Wigmans, P. Yepes

    A search for non-statistical fluctuations was performed in 200 GeV per nucleon oxygen and sulphur ion-emulsion interactions selected by a high transverse energy trigger. No clear signal of dynamical correlations or of unusual fluctuations was found. © 1990.

    Elsevier BV, 1990年12月, Physics Letters B, 252 (2), 303 - 310

    [査読有り]

  • T. Åkesson, S. Almehed, A. L.S. Angelis, S. Aoki, N. Armenise, H. Atherton, P. Aubry, G. Baroni, H. W. Bartels, G. Beaudoin, J. M. Beaulieu, H. Beker, O. Benary, D. Bettoni, V. Bisi, I. Blevis, H. Bøggild, A. C. Breslin, W. Cleland, M. Clemen, B. Collick, F. Corriveau, S. Dagan, D. H. Davis, K. Dederichs, S. Dell'Uomo, P. Depommier, R. C.E. Devenish, N. DiGiacomo, S. Di Liberto, J. R. Dodd, B. Dolgoshein, A. Drees, H. En'yo, B. Erlandsson, M. J. Esten, C. W. Fabjan, P. Fischer, Z. Fraenkel, A. Gaidot, F. Gibrat-Debu, P. Giubellino, P. Glassel, U. Goerlach, G. Grella, R. Haglund, L. A. Hamel, H. van Hecke, V. Hedberg, R. Heifetz, A. Holscher, K. Hoshino, T. Ishigami, B. Jacak, G. Jarlskog, S. Johansson, M. Kazuno, H. Kitamura, M. Kobayashi, Y. Kobayashi, K. Kodama, H. Kraner, V. Kroh, F. Lamarche, C. Leroy, D. Lissauer, G. London, B. Lorstad, A. Lounis, A. Marzari-Chiesa, M. Masera, M. A. Mazzoni, E. Mazzucato, M. L. McCubbin, P. McGaughey, F. Meddi, M. Miyanishi, U. Mjornmark, M. T. Muciaccia, S. Muraviev, M. Murray, K. Nakamura, S. Nakanishi, K. Nakazawa, M. Neubert, S. Nilsson, K. Niu, K. Niwa, M. Nomura, L. Olsen, Y. Oren, J. P. Pansart, Y. M. Park, A. Pfeiffer, F. Piuz, V. Polychronakos, G. Poulard, M. Price, D. Rahm, L. Ramello, L. Riccati, G. Romano, G. Rosa, L. Sandor, S. Sartori, J. Schukraft, M. Sekimoto, B. Sellden, M. Seman, C. Sgarbi, H. Shibuya, A. Shmeleva, V. Sidorov, S. Simone, Y. Sirois, H. Sletten, S. Smirnov, J. Soltani, W. Sondheim, H. J. Specht, I. Stumer, J. Sunier, H. Tajima, V. Tcherniatin, H. H. Thodberg, J. Thompson, V. Tikhomirov, D. N. Tovee, I. Tserruya, K. Tsukagoshi, Y. Umezawa, N. Ushida, G. Vasseur, R. Veenhof, S. Watanabe, R. Wigmans, P. Yepes

    Interactions of 16O and 32S at 200 GeV per nucleon in emulsion and in emulsion-tungsten chamber targets were tagged by transverse energy and multiplicity triggers in the HELIOS apparatus at CERN. As a first sample, 375 events, covering a wide range of transverse energies, were located and studied in emulsion. Results are reported in this paper. The angular distribution has been measured, event by event, with a wide pseudorapidity coverage, both in emulsion and in the HELIOS calorimeters. The total charged multiplicity and the transverse energy per charged particle have been obtained as a function of the transverse energy and of the pseudorapidity. The measured distributions are compared with the predictions of the Dual Parton Model, as coded in the IRIS generator. Assuming that 59% of the ET is transported by charged particles, and estimating the energy density by a full transparency picture, a comparison with cosmic-ray data has also been attempted. © 1990.

    1990年10月01日, Nuclear Physics, Section B, 342 (2), 279 - 301, 英語

    [査読有り]

  • S. Aoki, A. C. Breslin, D. H. Davis, K. Hoshino, R. Ihara, M. Imada, T. Ishigami, M. Kazuno, H. Kitamura, M. Kobayashi, M. Kobayashi, K. Kodama, Y. Maeda, A. Marzari-Chiesa, M. Masera, M. A. Mazzoni, F. Meddi, F. Minakawa, M. Miyanishi, M. T. Muciaccia, K. Nakamura, M. Nakamura, S. Nakanishi, K. Nakazawa, K. Niu, K. Niwa, M. Nomura, H. Okabe, G. Poulard, G. Romano, G. Rosa, Y. Sato, H. Shibuya, S. Simone, H. Tajima, S. Tasaka, M. Teranaka, I. Tezuka, D. N. Tovee, K. Tsukagoshi, N. Ushida, J. Yokota

    The production of charmed particles has been detected in 200 GeV per nucleon 16O-emulsion central interactions. Their production cross section in elementary nucleon-nucleon processes has been estimated to be charm = [14.1±9.3(stat.) -8.4+5.6 (syst.)]μb. © 1989.

    1989年07月06日, Physics Letters B, 224 (4), 441 - 444, 英語

    [査読有り]

  • COMPUTER-AIDED EMULSION ANALYSIS SYSTEM TO STUDY EVENTS WITH PRODUCTION CROSS-SECTION OF NANO BARN

    S AOKI, K CIBA, H FUCHI, K HOSHINO, M ICHIMI, K KODAMA, M MIYANISHI, M NAKAMURA, Y NAKAMURA, K NAKAZAWA, K NIU, K NIWA, M OHASHI, H SASAKI, H SHIBUYA, S TASAKA, N TORII, Y YAMAKAWA, Y YANAGISAWA

    PERGAMON-ELSEVIER SCIENCE LTD, 1986年, NUCLEAR TRACKS AND RADIATION MEASUREMENTS, 12 (1-6), 249 - 252, 英語

  • S. Aoki, K. Ciba, H. Fuchi, K. Hoshino, M. Ichimi, K. Kodama, M. Miyanishi, M. Nakamura, Y. Nakamura, K. Nakazawa, K. Niu, K. Niwa, M. Ohashi, H. Sasaki, H. Shibuya, S. Tasaka, N. Torii, Y. Yamakawa, Y. Yanagisawa

    New emulsion techniques to realize the analysing power of 104 events/year are described. Fully automated emulsion analysis system developed by the Nagoya University Group enabled us to conduct a hybrid emulsion-counter experiments to study very rare events with a cross section of the order of nano barn. © 1986.

    1986年, International Journal of Radiation Applications and Instrumentation. Part, 12 (1-6), 249 - 252, 英語

  • GRAINE計画 : 2015年豪州気球実験 全体報告

    高橋 覚, 青木 茂樹, 井上 達貴, 尾崎 圭太, 小坂 哲矢, 柴山 恵美, 鈴木 州, 立石 友里恵, 田中 僚, 田輪 周一, 原 俊雄, 水谷 深志, 薮 美智, 山田 恭平, 児玉 康一, 斎藤 芳隆, 田村 啓輔, 濱田 要, 吉田 哲也, 佐藤 禎宏, 手塚 禎宏, 伊代野 淳, 山本 紗矢, 石黒 勝己, 大塚 直登, 河原 宏晃, 北川 暢子, 駒谷 良輔, 小松 雅宏, さこ 隆志, 佐藤 修, 中 竜大, 長縄 直崇, 中野 敏行, 中村 光廣, 丹羽 公雄, 宮西 基明, 森下 美沙希, 森島 邦博, 吉本 雅浩, 六條 宏紀, Takahashi Satoru, Aoki Shigeki, Ozaki Keita, Kosaka Tetsuya, Shibayama Emi, Suzuki Atsumu, Tateishi Yurie, Tawa Shuichi, Hara Toshio, Mizutani Fukashi, Yamada Kyohei, Kodama Koichi, Saito Yoshidata, Tamura Keisuke, Hamada Kaname, Yoshida Tetsuya, Sato Yoshihiro, Tezuka Ikuo, Iyono Atsushi, Ishiguro Katsumi, Otsuka Naoto, Kawahara Hiroaki, Kitagawa Nobuko, Komatani Ryosuke, Komatsu Masahiro, Sako Takashi, Sato Osamu, Naka Tatsuhiro, Naganawa Naotaka, Nakano Toshiyuki, Nakamura Mitsuhiro, Niwa Kimio, Miyanishi Motoaki, Morishima Kunihiro, Yoshimoto Masahiro, Rokujo Hiroki

    大気球シンポジウム 平成27年度(2015年11月5-6日. 宇宙航空研究開発機構宇宙科学研究所 (JAXA)(ISAS)), 相模原市, 神奈川県著者人数: 41名資料番号: SA6000044028レポート番号: isas15-sbs-028

    宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS), 2015年11月, 大気球シンポジウム: 平成27年度 = Balloon Symposium: 2015, 日本語

  • GRAINE*計画:ロードマップと次回豪州フライトの目標 (*Gamma Ray Astro Imager with Nuclear Emulsion)

    青木 茂樹, 井上 達貴, 尾崎 圭太, 小坂 哲矢, 柴山 恵美, 鈴木 州, 高橋 覚, 立石 友里恵, 田中 僚, 田輪 周一, 原 俊雄, 水谷 深志, 薮 美智, 山田 恭平, 児玉 康一, 斎藤 芳隆, 田村 啓輔, 濱田 要, 吉田 哲也, 佐藤 禎宏, 手塚 郁夫, 伊代野 淳, 山本 紗矢, 石黒 勝己, 大塚 直登, 河原 宏晃, 北川 暢子, 駒谷 良輔, 小松 雅宏, 﨏 隆志, 佐藤 修, 中 竜大, 長縄 直祟, 中野 敏行, 中村 光廣, 丹羽 公雄, 宮西 基明, 森下 美沙希, 森島 邦博, 吉本 雅浩, 六條 宏紀, Aoki Shigeki, Ozaki Keita, Kosaka Tetsuya, Shibayama Emi, Suzuki Atsumu, Takahashi Satoru, Tateishi Yurie, Hara Toshio, Mizutani Fukashi, Yamada Kyohei, Kodama Koichi, Saito Yoshidata, Tamura Keisuke, Hamada Kaname, Yoshida Tetsuya, Sato Yoshihiro, Tezuka Ikuo, Iyono Atsushi, Ishiguro Katsumi, Otsuka Naoto, Kawahara Hiroaki, Kitagawa Nobuko, Komatani Ryosuke, Komatsu Masahiro, Sako Takashi, Sato Osamu, Naka Tatsuhiro, Naganawa Naotaka, Nakano Toshiyuki, Nakamura Mitsuhiro, Niwa Kimio, Miyanishi Motoaki, Morishima Kunihiro, Yoshimoto Masahiro, Rokujo Hiroki

    大気球シンポジウム 平成27年度(2015年11月5-6日. 宇宙航空研究開発機構宇宙科学研究所 (JAXA)(ISAS)), 相模原市, 神奈川県著者人数: 41名資料番号: SA6000044043レポート番号: isas15-sbs-043

    宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS), 2015年11月, 大気球シンポジウム: 平成27年度 = Balloon Symposium: 2015, 日本語

  • GRAINE計画:エマルション望遠鏡による宇宙ガンマ線観測計画

    高橋 覚, 青木 茂樹, 尾崎 圭太, 小坂 哲矢, 柴山 恵美, 鈴木 州, 立石 友里恵, 田輪 周一, 原 俊雄, 水谷 深志, 山田 恭平, 児玉 康一, 齋藤 芳隆, 田村 啓輔, 濱田 要, 吉田 哲也, 佐藤 禎宏, 手塚 郁夫, 伊代野 淳, 石黒 勝己, 大塚 直登, 河原 宏晃, 北川 暢子, 駒谷 良輔, 小松 雅宏, さこ 隆志, 佐藤 修, 中 竜大, 中塚 祐司, 長縄 直崇, Takahashi Satoru, Aoki Shigeki, Ozaki Keita, Kosaka Tetsuya, Shibayama Emi, Suzuki Atsumu, Tateishi Yurie, Tawa Shuichi, Hara Toshio, Mizutani Fukashi, Yamada Kyohei, Kodama Kohichi, Saito Yoshitaka, Tamura Keisuke, Hamada Kaname, Yoshida Tetsuya, Sato Sadahiro, Tezuka Ikuo, Iyono Atsushi, Ishiguro Katsumi, Otsuka Naoto, Kawahara Hiroaki, Kitagawa Nobuko, Komatani Ryosuke, Komatsu Masahiro, Sako Takashi, Sato Osamu, Naka Tatsuhiro, Nakatsuka Yuji, Naganawa Naotaka

    大気球シンポジウム 平成26年度(2014年11月6-7日. 宇宙航空研究開発機構宇宙科学研究所 (JAXA)(ISAS)), 相模原市, 神奈川県著者人数: 37名資料番号: SA6000021003レポート番号: isas14-sbs-003

    宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS), 2014年11月, 大気球シンポジウム: 平成26年度 = Balloon Symposium: 2014, 日本語

  • GRAINE計画:オーストラリア実験の準備状況1

    六條 宏紀, 石黒 勝己, 大塚 直登, 河原 宏晃, 北川 暢子, 駒谷 良輔, 小松 雅宏, さこ 隆志, 佐藤 修, 鈴木 和也, 中 竜大, 中塚 祐司, 長縄 直崇, 中野 敏行, 中村 光廣, 丹羽 公雄, 宮西 基明, 毛登 優樹, 森島 邦博, 吉田 純也, 吉本 雅浩, 児玉 康一, 齋藤 芳隆, 田村 啓輔, 濱田 要, 吉田 哲也, 佐藤 禎宏, 手塚 郁夫, 伊代野 淳, 青木 茂樹, Rokujo Hiroki, Ishiguro Katsumi, Otsuka Naoto, Kawahara Hiroaki, Kitagawa Nobuko, Komatani Ryosuke, Komatsu Masahiro, Sako Takashi, Sato Osamu, Suzuki Kazuya, Naka Tatsuhiro, Nakatsuka Yuji, Naganawa Naotaka, Nakano Toshiyuki, Nakamura Mitsuhiro, Niwa Kimio, Miyanishi Motoaki, Moto Masaki, Morishima Kunihiro, Yoshida Junya, Yoshimoto Masahiro, Kodama Kohichi, Saito Yoshitaka, Tamura Keisuke, Hamada Kaname, Yoshida Tetsuya, Sato Sadahiro, Tezuka Ikuo, Iyono Atsushi, Aoki Shigeki

    大気球シンポジウム 平成26年度(2014年11月6-7日. 宇宙航空研究開発機構宇宙科学研究所 (JAXA)(ISAS)), 相模原市, 神奈川県著者人数: 40名資料番号: SA6000021004レポート番号: isas14-sbs-004

    宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS), 2014年11月, 大気球シンポジウム: 平成26年度 = Balloon Symposium: 2014, 日本語

  • GRAINE計画:オーストラリア実験準備状況2

    水谷 深志, 青木 茂樹, 尾崎 圭太, 小坂 哲矢, 柴山 恵美, 鈴木 州, 高橋 覚, 立石 友里恵, 田輪 周一, 原 俊雄, 山田 恭平, 児玉 康一, 齋藤 芳隆, 田村 啓輔, 濱田 要, 吉田 哲也, 佐藤 禎宏, 手塚 郁夫, 伊代野 淳, 石黒 勝己, 河原 宏晃, 北川 暢子, 駒谷 良輔, 小松 雅宏, さこ 隆志, 佐藤 修, 鈴木 和也, 中 竜大, 中塚 祐司, 長縄 直崇, Mizutani Fukashi, Aoki Shigeki, Ozaki Keita, Kosaka Tetsuya, Shibayama Emi, Suzuki Atsumu, Takahashi Satoru, Tateishi Yurie, Tawa Shuichi, Hara Toshio, Yamada Kyohei, Kodama Kohichi, Saito Yoshitaka, Tamura Keisuke, Hamada Kaname, Yoshida Tetsuya, Sato Sadahiro, Tezuka Ikuo, Iyono Atsushi, Ishiguro Katsumi, Kawahara Hiroaki, Kitagawa Nobuko, Komatani Ryosuke, Komatsu Masahiro, Sako Takashi, Sato Osamu, Suzuki Kazuya, Naka Tatsuhiro, Nakatsuka Yuji, Naganawa Naotaka

    大気球シンポジウム 平成26年度(2014年11月6-7日. 宇宙航空研究開発機構宇宙科学研究所 (JAXA)(ISAS)), 相模原市, 神奈川県著者人数: 38名資料番号: SA6000021005レポート番号: isas14-sbs-005

    宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS), 2014年11月, 大気球シンポジウム: 平成26年度 = Balloon Symposium: 2014, 日本語

  • 16aRK-7 ハイブリッド・エマルション法を用いたダブルストレンジネス核の研究(KEK-PSE373)(ハイパー核・ストレンジネス,実験核物理,理論核物理合同,実験核物理)

    高橋 仁, 秋川 藤志, 青木 茂樹, Chung J.H., 星野 香, 市川 温子, 今井 憲一, 岩田 陽助, 三津原 正勝, 長瀬 由紀, 仲澤 和馬, 岡部 久高, Park B.D., 関 大介, 渋谷 寛, 竹内 富士雄, 安田 仲宏, Yoon C.S., Yoon C.J., KEK-PSE373 collaboration

    一般社団法人日本物理学会, 2002年08月13日, 日本物理学会講演概要集, 57 (2), 59 - 59, 日本語

講演・口頭発表等

  • GRAINE Project: Balloon-borne Gamma-ray Telescope with Nuclear Emulsion

    S. Aoki for GRAINE collaboration

    ICMaSS 2019, 2019年11月02日

    口頭発表(一般)

  • GRAINE project: Cosmic Gamma-ray Observation by Balloon-Borne Telescope with Nuclear Emulsion

    Aoki S, for GRAINE collaboration

    宇宙線研究者会議(CRC) 将来計画タウンミーティング, 2017年03月, 英語, 東京大学柏図書館メディアホール, 国内会議

    口頭発表(一般)

  • GRAINE project: Cosmic Gamma-ray Observation by Balloon-Borne Telescope with Nuclear Emulsion

    Aoki S, for GRAINE collaboration

    The 3rd KMI International Symposium on "Quest for the Origin of Particles and the Universe", 2017年01月, 英語, Nagoya University, Japan, 国際会議

    [招待有り]

    口頭発表(招待・特別)

  • GRAINE project: First massive production and use of "High sensitive emulsion gel film"

    Aoki S, for GRAINE collaboration

    「ニュートリノフロンティア」研究会, 2014年12月, 英語, 富士カーム, 国内会議

    口頭発表(一般)

  • GRAINE project: Gamma-Ray Astro-Imager with Nuclear Emulsion.

    Aoki S, for GRAINE collaboration

    26th International Conference on Nuclear Tracks in Solids, 2014年09月, 英語, Integrated Research Center, Kobe University, Japan, 国際会議

    口頭発表(一般)

  • GRAINE計画 Gamma-Ray Astro-Imager with Nuclear Emulsion

    青木 茂樹

    宇宙線研究者会議(CRC) 将来計画タウンミーティング, 2014年03月, 日本語, 国内会議

    口頭発表(一般)

  • GRAINE project: Cosmic Gamma-Ray Observation with Balloon-Borne Telescope with Nuclear Emulsion.

    Aoki S, for GRAINE collaboration

    66th Fujihara Seminar: X-raying the Gamma-Ray Universe, 2013年11月, 英語, Hakone-Yumoto, Kanagawa-ken, Japan, 国際会議

    口頭発表(一般)

  • Results from T2K Experiment.

    Aoki S, for, T, K collaboration

    International Workshop on "Double Beta Decay and Neutrinos", 2011年11月, 英語, Crystal Tower, Osaka Business Park, Osaka, Japan, 国際会議

    [招待有り]

    口頭発表(招待・特別)

  • Recent development on nuclear emulsion technique and its application

    青木 茂樹

    「粒子線と物質の相互作用に関する新たなる展開を目指す総合研究」成果報告会, 2008年03月, 日本語, 岡山理科大学, 国内会議

    口頭発表(一般)

  • Experimental Review of Neutrino Physics.

    Aoki S

    LP01 (XX International Symposium on Lepton and Photon Interactions at High Energies), 2001年07月, 英語, Laboratori Nazionali di Frascati, Universita' di Roma, Rome, イタリア, 国際会議

    口頭発表(招待・特別)

  • OPERA: An Appearance Experiment for νμ→ντ Oscillation

    Aoki S

    FCP01 (Frontiers in Contemporary Physics – II), 2001年03月, 英語, Vanderbilt University, Nashville, TN, アメリカ合衆国, 国際会議

    口頭発表(招待・特別)

  • Tracking and Vertex Reconstruction in Modern Emulsion Experiments.

    Aoki S

    VERTEX 2000 (9th International Workshop on Vertex Detectors), 2000年09月, 英語, Purdue University, Sleeping Bear Dunes National Lakeshore MI, アメリカ合衆国, 国際会議

    口頭発表(招待・特別)

所属学協会

  • 日本写真学会

    2010年10月 - 現在
  • 日本物理学会

    1985年08月 - 現在

共同研究・競争的資金等の研究課題