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Evidence for νμ→ντ appearance in the CNGS neutrino beam with the OPERA experiment

  • N. Agafonova
  • , A. Aleksandrov
  • , A. Anokhina
  • , S. Aoki
  • , A. Ariga
  • , T. Ariga
  • , T. Asada
  • , D. Autiero
  • , A. Ben Dhahbi
  • , A. Badertscher
  • , D. Bender
  • , A. Bertolin
  • , C. Bozza
  • , R. Brugnera
  • , F. Brunet
  • , G. Brunetti
  • , A. Buonaura
  • , S. Buontempo
  • , B. Büttner
  • , 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. Dmitrievski, M. Dracos, D. Duchesneau, S. Dusini, T. Dzhatdoev, J. Ebert, A. Ereditato, J. Favier, T. Ferber, G. Ferone, R. A. Fini, T. Fukuda, G. Galati, A. Garfagnini, G. Giacomelli, C. Goellnitz, J. Goldberg, Y. Gornushkin, G. Grella, F. Grianti, 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, J. Kawada, H. Kawahara, 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, 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, H. Rokujo, T. Roganova, G. Rosa, I. Rostovtseva, A. Rubbia, O. Ryazhskaya, O. Sato, Y. Sato, A. Schembri, W. Schmidt-Parzefal, 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, K. Suzuki, 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, J. Yoshida, M. Yoshimoto, Y. Zaitsev, 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
  • IGFL, Université de Lyon, Université Lyon 1
  • ETH Zurich
  • Middle East Technical University (METU)
  • INFN
  • University of Salerno
  • University of Padova
  • Université Savoie Mont Blanc
  • Dipartimento di Scienze Fisiche
  • Universität Hamburg
  • P.N. Lebedev Physical Institute of the Russian Academy of Sciences
  • LNF-INFN
  • Joint Institute for Nuclear Research, Dubna
  • Laboratori Nazionali del Gran Sasso
  • INFN Sezione di Bari
  • Dipartimento di Fisica
  • INFN Sezione di Bologna
  • Université de Strasbourg
  • Toho University
  • Dipartimento di Fisica
  • Technion - Israel Institute of Technology
  • Sezione di Roma
  • Ruđer Bošković Institute
  • Ankara University
  • Gyeongsang National University
  • Aichi University of Education
  • Institute for Theoretical and Experimental Physics
  • Utsunomiya University
  • University of Milano-Bicocca
  • Inter-University Institute for High Energies ULB-VUB

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

Résumé

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

langue originaleAnglais
Numéro d'article051102
journalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume89
Numéro de publication5
Les DOIs
étatPublié - 5 mars 2014
Modification externeOui

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