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Agafonova, N; Aleksandrov, A; Anokhina, A; Ariga, A; Ariga, T; Bender, D; Bertolin, A; Bodnarchuk, I; Brugnera, R; Buontempo, S; Büttner, B; Chernyavsky, M; Consiglio, L; De Lellis, G; De Serio, M; Di Ferdinando, D; Dmitrievski, S; Dracos, M; Duchesneau, D; Dusini, S; Dzhatdoev, T; Ebert, J; Ereditato, A; Fini, R A; Fornari, F; Galati, G; Goldberg, J; Gornushkin, Y; Gustavino, C; Hara, T; Hayakawa, H; Hollnagel, A; Hosseini, B; Ishiguro, K; Jakovcic, K; Jollet, C; Kamiscioglu, M; Kim, J H; Kim, S H; Kitagawa, N; Klicek, B; Komatsu, M; Kose, U; Kreslo, I; Laudisio, F; Longhin, A; Loverre, P F; Malgin, A; Malenica, M; Mandrioli, G; Matsuo, T; Matsushita, T; Matveev, V; Medinaceli, E; Meregaglia, A; Mikado, S; Miyanishi, M; Mizutani, F; Montesi, M C; Morishima, K; Muciaccia, M T; Nakamura, M; Nakano, T; Nakatsuka, Y; Niwa, K; Olchevsky, A; Ozaki, K; Paoloni, A; Paparella, L; Park, B D; Pasqualini, L; Pastore, A; Patrizii, L; Pessard, H; Polukhina, N; Pupilli, F; Roda, M; Roganova, T; Rosa, G; Ryazhskaya, O; Sato, O; Shchedrina, T; Shiraishi, T; Shoziyoev, G; Sirignano, C; Sirri, G; Sotnikov, A; Stanco, L; Stellacci, S M; Stipcevic, M; Strolin, P; Terranova, F; Tufanli, S; Vilain, P; Vladymyrov, M; Votano, L; Wilquet, G; Wonsak, B; Yoon, C S; Zemskova, S
Physical review letters, 2015-Sep-18, Letnik: 115, Številka: 12Journal Article
The OPERA experiment was designed to search for ν_{μ}→ν_{τ} oscillations in appearance mode, i.e., by detecting the τ leptons produced in charged current ν_{τ} interactions. The experiment took data from 2008 to 2012 in the CERN Neutrinos to Gran Sasso beam. The observation of the ν_{μ}→ν_{τ} appearance, achieved with four candidate events in a subsample of the data, was previously reported. In this Letter, a fifth ν_{τ} 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 ν_{μ}→ν_{τ} oscillations in appearance mode with a significance larger than 5σ.
