Search forνμ→ντoscillation with the OPERA experiment in the CNGS beam

Agafonova, N; Aleksandrov, A; Altinok, O; Anokhina, A; Aoki, S; Ariga, A; Ariga, T; Autiero, D; Badertscher, A; Bagulya, A; Ben Dhahbi, A; Bertolin, A; Bozza, C; Brugière, T; Brugnera, R; Brunet, F; Brunetti, G; Buontempo, S; Cazes, A; Chaussard, L; Chernyavskiy, M; Chiarella, V; Chukanov, A; D'Ambrosio, N; Dal Corso, F; Déclais, Y; del Amo Sanchez, P; De Lellis, G; De Serio, M; DI CAPUA, Francesco; Di Crescenzo, A; Di Ferdinando, D; Di Marco, N; Dmitrievski, S; Dracos, M; Duchesneau, D; Dusini, S; Dzhatdoev, T; Ebert, J; Egorov, O; Enikeev, R; Ereditato, A; Esposito, L. S; Favier, J; Ferber, T; Fini, R. A; Frekers, D; Fukuda, T; Garfagnini, A; Giacomelli, G; Giorgini, M; Göllnitz, C; Goldberg, J; Golubkov, D; Goncharova, L; Gornushkin, Y; Grella, G; Grianti, F; Guler, A. M; Gustavino, C; Hagner, C; Hamada, K; Hara, T; Hierholzer, M; Hollnagel, A; Hoshino, K; Ieva, M; Ishida, H; Ishiguro, K; Jakovcic, K; Jollet, C; Juget, F; Kamiscioglu, M; Kim, S. H; Kimura, M; Kitagawa, N; Klicek, B; Knuesel, J; Kodama, K; Kogiso, K; Komatsu, M; Kose, U; Kreslo, I; Lazzaro, C; Lenkeit, J; Lippi, I; Ljubicic, A; Longhin, A; Loverre, P; Lutter, G; Malgin, A; Mandrioli, G; Mannai, K; Marteau, J; Matsuo, T; Matveev, V; Mauri, N; Medinaceli, E; Meisel, F; Meregaglia, A; Migliozzi, P; Mikado, S; Miyamoto, S; Monacelli, P; Morishima, K; Moser, U; Muciaccia, M. T; Naganawa, N; Naka, T; Nakamura, M; Nakano, T; Nakatsuka, Y; Naumov, D; Nikitina, V; Niwa, K; Nonoyama, Y; Ogawa, S; Okateva, N; Olshevsky, A; Omura, T; Palamara, O; Paniccia, M; Paoloni, A; Park, B. D; Park, I. G; Pastore, A; Patrizii, L; Pennacchio, E; Pessard, H; Pistillo, C; Polukhina, N; Pozzato, M; Pretzl, K; Pupilli, F; Rescigno, R; Roganova, T; Rokujo, H; Romano, G; Rosa, G; Rostovtseva, I; Rubbia, A; Russo, A; Ryasny, V; Ryazhskaya, O; Sato, O; Sato, Y; Schembri, A; Schmidt Parzefall, W; Scotto Lavina, L; Sheshukov, A; Shibuya, H; Shoziyoev, G; Simone, S; Sioli, M; Sirignano, C; Sirri, G; Song, J. S; Spinetti, M; Stanco, L; Starkov, N; Stellacci, M; Stipcevic, M; Strauss, T; Strolin, P; Suzuki, K; Takahashi, S; Tenti, M; Terranova, F; Tezuka, I; Tioukov, V; Tolun, P; Trabelsi, A; Tran, T; Tufanli, S; Vilain, P; Vladimirov, M; Votano, L; Vuilleumier, J. L; Wilquet, G; Wonsak, B; Yakushev, V; Yoon, C. S; Yoshida, J; Yoshioka, T; Zaitsev, Y; Zemskova, S; Zghiche, A; Zimmermann, R.

doi:10.1088/1367-2630/14/3/033017

The OPERA neutrino experiment in the underground Gran Sasso Laboratory (LNGS) was designed to perform the first detection of neutrino oscillations in direct appearance mode in the vμ→ v τ channel, the v τ signature being the identification of the τ -lepton created in its charged current interaction. The hybrid apparatus consists of a large mass emulsion film/lead target complemented by electronic detectors. Placed in the LNGS, it is exposed to the high-energy long-baseline CERN Neutrino beam to Gran Sasso (CNGS) 730 km away from the neutrino source. The observation of a first v τ candidate event was reported in 2010. In this paper, we discuss the result of the analysis of the data taken during the first two years of operation (2008-2009) underlining the major improvements brought to the analysis chain and to the Monte Carlo simulations. The statistical significance of the one event observed so far is then evaluated to 95%.

Search forνμ→ντoscillation with the OPERA experiment in the CNGS beam / Agafonova, N; Aleksandrov, A; Altinok, O; Anokhina, A; Aoki, S; Ariga, A; Ariga, T; Autiero, D; Badertscher, A; Bagulya, A; Ben Dhahbi, A; Bertolin, A; Bozza, C; Brugière, T; Brugnera, R; Brunet, F; Brunetti, G; Buontempo, S; Cazes, A; Chaussard, L; Chernyavskiy, M; Chiarella, V; Chukanov, A; D'Ambrosio, N; Dal Corso, F; Déclais, Y; del Amo Sanchez, P; De Lellis, G; De Serio, M; DI CAPUA, Francesco; Di Crescenzo, A; Di Ferdinando, D; Di Marco, N; Dmitrievski, S; Dracos, M; Duchesneau, D; Dusini, S; Dzhatdoev, T; Ebert, J; Egorov, O; Enikeev, R; Ereditato, A; Esposito, L. S; Favier, J; Ferber, T; Fini, R. A; Frekers, D; Fukuda, T; Garfagnini, A; Giacomelli, G; Giorgini, M; Göllnitz, C; Goldberg, J; Golubkov, D; Goncharova, L; Gornushkin, Y; Grella, G; Grianti, F; Guler, A. M; Gustavino, C; Hagner, C; Hamada, K; Hara, T; Hierholzer, M; Hollnagel, A; Hoshino, K; Ieva, M; Ishida, H; Ishiguro, K; Jakovcic, K; Jollet, C; Juget, F; Kamiscioglu, M; Kim, S. H; Kimura, M; Kitagawa, N; Klicek, B; Knuesel, J; Kodama, K; Kogiso, K; Komatsu, M; Kose, U; Kreslo, I; Lazzaro, C; Lenkeit, J; Lippi, I; Ljubicic, A; Longhin, A; Loverre, P; Lutter, G; Malgin, A; Mandrioli, G; Mannai, K; Marteau, J; Matsuo, T; Matveev, V; Mauri, N; Medinaceli, E; Meisel, F; Meregaglia, A; Migliozzi, P; Mikado, S; Miyamoto, S; Monacelli, P; Morishima, K; Moser, U; Muciaccia, M. T; Naganawa, N; Naka, T; Nakamura, M; Nakano, T; Nakatsuka, Y; Naumov, D; Nikitina, V; Niwa, K; Nonoyama, Y; Ogawa, S; Okateva, N; Olshevsky, A; Omura, T; Palamara, O; Paniccia, M; Paoloni, A; Park, B. D; Park, I. G; Pastore, A; Patrizii, L; Pennacchio, E; Pessard, H; Pistillo, C; Polukhina, N; Pozzato, M; Pretzl, K; Pupilli, F; Rescigno, R; Roganova, T; Rokujo, H; Romano, G; Rosa, G; Rostovtseva, I; Rubbia, A; Russo, A; Ryasny, V; Ryazhskaya, O; Sato, O; Sato, Y; Schembri, A; Schmidt Parzefall, W; Scotto Lavina, L; Sheshukov, A; Shibuya, H; Shoziyoev, G; Simone, S; Sioli, M; Sirignano, C; Sirri, G; Song, J. S; Spinetti, M; Stanco, L; Starkov, N; Stellacci, M; Stipcevic, M; Strauss, T; Strolin, P; Suzuki, K; Takahashi, S; Tenti, M; Terranova, F; Tezuka, I; Tioukov, V; Tolun, P; Trabelsi, A; Tran, T; Tufanli, S; Vilain, P; Vladimirov, M; Votano, L; Vuilleumier, J. L; Wilquet, G; Wonsak, B; Yakushev, V; Yoon, C. S; Yoshida, J; Yoshioka, T; Zaitsev, Y; Zemskova, S; Zghiche, A; Zimmermann, R.. - In: NEW JOURNAL OF PHYSICS. - ISSN 1367-2630. - 14:3(2012), p. 033017. [10.1088/1367-2630/14/3/033017]