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

(OPERA Collaboration) Agafonova, N.; Aleksandrov, A.; Anokhina, A.; Aoki, S.; Ariga, A.; Ariga, T.; Asada, T.; Bender, D.; Bertolin, A.; Bozza, C.; Brugnera, R.; Buonaura, A.; Buettner, B.; Buontempo, S.; Chernyavsky, M.; Chukanov, A.; Consiglio, L.; D'Ambrosio, N.; De Lellis, G.; De Serio, M.; Sanchez, P. del Amo; Di Crescenzo, A.; Di Ferdinando, D.; Di Marco, N.; Dmitrievsky, S.; Dracos, M.; Duchesneau, D.; Dusini, S.; Dzhatdoev, T.; Ebert, J.; Ereditato, A.; Fini, R. A.; Fukuda, T.; Galati, G.; Garfagnini, A.; Giacomelli, G.; Goellnitz, C.; Goldberg, J.; Gornushkin, Y.; Grella, G.; Guler, M.; Gustavino, C.; Hagner, C.; Hara, T.; Hayakawa, T.; Hollnagel, A.; Hosseini, B.; Ishida, H.; Ishiguro, K.; Jakovčić, Krešimir; Jollet, C.; Kamiscioglu, C.; Kamiscioglu, M.; Katsuragawa, T.; Kawada, J.; Kawahara, H.; Kim, J. H.; Kim, S. H.; Kitagawa, N.; Kliček, Budimir; Kodama, K.; Komatsu, M.; Kose, U.; Kreslo, I.; Lauria, A.; Lenkeit, J.; Ljubičić, Ante; Longhin, A.; Loverre, P.; Malgin, A.; Malenica, Marko; Mandrioli, G.; Matsuo, T.; Matveev, V.; Mauri, N.; Medinaceli, E.; Meregaglia, A.; Meyer, M.; Mikado, S.; Miyanishi, M.; Monacelli, P.; Montesi, M. C.; Morishima, K.; Muciaccia, M. T.; Naganawa, N.; Naka, T.; Nakamura, M.; Nakano, T.; Nakatsuka, Y.; Niwa, K.; Ogawa, S.; Okateva, N.; Olchevsky, A.; Omura, T.; Ozaki, K.; Paoloni, A.; Park, B. D.; Park, I. G.; Pasqualini, L.; Pastore, A.; Patrizii, L.; Pessard, H.; Pistillo, C.; Podgrudkov, D.; Polukhina, N.; Pozzato, M.; Pupilli, F.; Roda, M.; Rokujo, H.; Roganova, T.; Rosa, G.; Ryazhskaya, O.; Sato, O.; Schchedrina, T.; Schembri, A.; Shakiryanova, I.; Sheshukov, A.; Shibuya, H.; Shiraishi, T.; Shoziyoev, G.; Simone, S.; Sioli, M.; Sirignano, C.; Sirri, G.; Spinetti, M.; Stanco, L.; Starkov, N.; Stellacci, S. M.; Stipčević, Mario; Strolin, P.; Takahashi, S.; Tenti, M.; Terranova, F.; Tioukov, V.; Tufanli, S.; Umemoto, A.; Vilain, P.; Vladimirov, M.; Votano, L.; Vuilleumier, J. -L.; Wilquet, G.; Wonsak, B.; Yoon, C. S.; Yaguchi, I.; Yoshimoto, M.; Zemskova, S.; Zghiche, A. (2014) Observation of tau neutrino appearance in the CNGS beam with the OPERA experiment. Progress of Theoretical and Experimental Physics, 2014 (10). 101C01/1-101C01/10. ISSN 2050-3911

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Abstract

The OPERA experiment is searching for νμ→ντ oscillations in appearance mode, i.e., via the direct detection of τ leptons in ντ charged-current interactions. The evidence of νμ→ντ appearance has been previously reported with three ντ candidate events using a sub-sample of data from the 2008–2012 runs. We report here a fourth ντ candidate event, with the τ 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, νμ→ντ oscillations are established with a significance of 4.2σ.

Item Type: Article
Uncontrolled Keywords: Neutrino masses, mixing, and oscillations, experiments using neutrino beams
Subjects: NATURAL SCIENCES > Physics
Divisions: Division of Experimental Physics
Projects:
Project titleProject leaderProject codeProject type
Masivni neutrini i astročestice: od fizike čestica do kozmologije-Ante Ljubičić098-0982887-2872MZOS
Depositing User: Ante Ljubičić
Date Deposited: 25 Aug 2016 12:20
Last Modified: 25 Aug 2016 12:20
URI: http://fulir.irb.hr/id/eprint/3000
DOI: 10.1093/ptep/ptu132

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