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Observation of tau neutrino appearance in the CNGS beam with the OPERA experiment

  • 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. Büttner
  • , 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
  • Institute for Nuclear Research of the Russian Academy of Sciences
  • INFN Sezione di Napoli
  • Moscow State University
  • Kobe University
  • University of Bern
  • Nagoya University
  • Middle East Technical University (METU)
  • INFN
  • University of Salerno
  • University of Padova
  • University of Naples Federico II
  • Universität Hamburg
  • P.N. Lebedev Physical Institute of the Russian Academy of Sciences
  • Joint Institute for Nuclear Research, Dubna
  • Laboratori Nazionali del Gran Sasso
  • INFN Sezione di Bari
  • Università degli studi di Bari Aldo Moro
  • Université Savoie Mont Blanc
  • INFN Sezione di Bologna
  • Université de Strasbourg
  • Toho University
  • University of Bologna
  • Technion - Israel Institute of Technology
  • Sezione di Roma
  • Ruđer Bošković Institute
  • Ankara University
  • Gyeongsang National University
  • Institute for Basic Science (IBS)
  • Aichi University of Education
  • LNF-INFN
  • Dipartimento di Fisica
  • Nihon University
  • Sungkyunkwan University
  • University of Milano-Bicocca
  • Université Libre de Bruxelles

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

59 Citations (Scopus)

Résumé

The OPERA experiment is searching for νμ ν τ oscillations in appearance mode, i.e., via the direct detection of \tau leptons in \nu -\tau charged-current interactions. The evidence of \nu -\mu \rightarrow \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 \rightarrow \nu -\tau oscillations are established with a significance of 4.2\sigma.

langue originaleAnglais
Numéro d'article101C01
journalProgress of Theoretical and Experimental Physics
Volume2014
Numéro de publication10
Les DOIs
étatPublié - 2 juil. 2014
Modification externeOui

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