研究者紹介システム

高橋 覚
タカハシ サトル
大学院人間発達環境学研究科 人間環境学専攻
助教
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

学位

  • 博士(理学), 名古屋大学

ジャンル

  • 科学・技術 / 物理学

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

論文

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

    2018年01月, Eur. Phys. J. C, 12 (5), P05011, 英語

    [査読有り]

    研究論文(学術雑誌)

  • 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, 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, 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, JOURNAL OF INSTRUMENTATION, 12 (5), P05011, 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, 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, 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, JOURNAL OF INSTRUMENTATION, 11 (7), P07022, 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)

  • 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)

  • 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)

  • 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, PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, 2014 (10), 101C01, 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, EUROPEAN PHYSICAL JOURNAL C, 74 (8), 2986, 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

    2014年07月, Eur. Phys. J. C, 74 (7), 2933, 英語

    [査読有り]

    研究論文(学術雑誌)

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