Discovery of τ Neutrino Appearance in the CNGS Neutrino Beam with the OPERA Experiment

Agafonova, N.; Aleksandrov, A.; Anokhina, A.; Aoki, S.; Ariga, A.; Ariga, T.; Bender, D.; Bertolin, A.; Bodnarchuk, I.; Bozza, Cristiano; Brugnera, R.; Buonaura, A.; Buontempo, S.; Büttner, B.; Chernyavsky, M.; Chukanov, A.; Consiglio, L.; D’Ambrosio, N.; De Lellis, G.; De Serio, M.; Del Amo Sanchez, P.; Di Crescenzo, A.; Di Ferdinando, D.; Di Marco, N.; Dmitrievski, S.; Dracos, M.; Duchesneau, D.; Dusini, S.; Dzhatdoev, T.; Ebert, J.; Ereditato, A.; Fini, R.  . a.; Fornari, F.; Fukuda, T.; Galati, G.; Garfagnini, A.; Goldberg, J.; Gornushkin, Y.; Grella, Giuseppe; Guler, A.  . m.; Gustavino, C.; Hagner, C.; Hara, T.; Hayakawa, H.; Hollnagel, A.; Hosseini, B.; Ishiguro, K.; Jakovcic, K.; Jollet, C.; Kamiscioglu, C.; Kamiscioglu, M.; Kim, J.  . h.; Kim, S.  . h.; Kitagawa, N.; Klicek, B.; Kodama, K.; Komatsu, M.; Kose, U.; Kreslo, I.; Laudisio, F.; Lauria, A.; Ljubicic, A.; Longhin, A.; Loverre, P.  . f.; Malgin, A.; Malenica, M.; Mandrioli, G.; Matsuo, T.; Matsushita, T.; Matveev, V.; Mauri, N.; Medinaceli, E.; Meregaglia, A.; Mikado, S.; Miyanishi, M.; Mizutani, F.; Monacelli, P.; Montesi, M.  . c.; Morishima, K.; Muciaccia, M.  . t.; Naganawa, N.; Naka, T.; Nakamura, M.; Nakano, T.; Nakatsuka, Y.; Niwa, K.; Ogawa, S.; Olchevsky, A.; Omura, T.; Ozaki, K.; Paoloni, A.; Paparella, L.; 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.; Roganova, T.; Rokujo, H.; Rosa, G.; Ryazhskaya, O.; Sato, O.; Schembri, A.; Schmidt Parzefall, W.; Shakirianova, I.; Shchedrina, T.; Sheshukov, A.; Shibuya, H.; Shiraishi, T.; Shoziyoev, G.; Simone, S.; Sioli, M.; Sirignano, C.; Sirri, G.; Sotnikov, A.; Spinetti, M.; Stanco, L.; Starkov, N.; Stellacci, Simona Maria; Stipcevic, M.; Strolin, P.; Takahashi, S.; Tenti, M.; Terranova, F.; Tioukov, V.; Tufanli, S.; Vilain, P.; Vladymyrov, M.; Votano, L.; Vuilleumier, J.  . l.; Wilquet, G.; Wonsak, B.; Yoon, C.  . s.; Zemskova, S.

doi:10.1103/PhysRevLett.115.121802

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 .

Titolo:	Discovery of τ Neutrino Appearance in the CNGS Neutrino Beam with the OPERA Experiment
Autori:	Agafonova, N. Aleksandrov, A. Anokhina, A. Aoki, S. Ariga, A. Ariga, T. Bender, D. Bertolin, A. Bodnarchuk, I. BOZZA, Cristiano Brugnera, R. Buonaura, A. Buontempo, S. Büttner, B. Chernyavsky, M. Chukanov, A. Consiglio, L. D’Ambrosio, N. De Lellis, G. De Serio, M. Del Amo Sanchez, P. Di Crescenzo, A. Di Ferdinando, D. Di Marco, N. Dmitrievski, S. Dracos, M. Duchesneau, D. Dusini, S. Dzhatdoev, T. Ebert, J. Ereditato, A. Fini, R. .a. Fornari, F. Fukuda, T. Galati, G. Garfagnini, A. Goldberg, J. Gornushkin, Y. GRELLA, Giuseppe Guler, A. .m. Gustavino, C. Hagner, C. Hara, T. Hayakawa, H. Hollnagel, A. Hosseini, B. Ishiguro, K. Jakovcic, K. Jollet, C. Kamiscioglu, C. Kamiscioglu, M. Kim, J. .h. Kim, S. .h. Kitagawa, N. Klicek, B. Kodama, K. Komatsu, M. Kose, U. Kreslo, I. Laudisio, F. Lauria, A. Ljubicic, A. Longhin, A. Loverre, P. .f. Malgin, A. Malenica, M. Mandrioli, G. Matsuo, T. Matsushita, T. Matveev, V. Mauri, N. Medinaceli, E. Meregaglia, A. Mikado, S. Miyanishi, M. Mizutani, F. Monacelli, P. Montesi, M. .c. Morishima, K. Muciaccia, M. .t. Naganawa, N. Naka, T. Nakamura, M. Nakano, T. Nakatsuka, Y. Niwa, K. Ogawa, S. Olchevsky, A. Omura, T. Ozaki, K. Paoloni, A. Paparella, L. 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. Roganova, T. Rokujo, H. Rosa, G. Ryazhskaya, O. Sato, O. Schembri, A. Schmidt Parzefall, W. Shakirianova, I. Shchedrina, T. Sheshukov, A. Shibuya, H. Shiraishi, T. Shoziyoev, G. Simone, S. Sioli, M. Sirignano, C. Sirri, G. Sotnikov, A. Spinetti, M. Stanco, L. Starkov, N. STELLACCI, SIMONA MARIA Stipcevic, M. Strolin, P. Takahashi, S. Tenti, M. Terranova, F. Tioukov, V. Tufanli, S. Vilain, P. Vladymyrov, M. Votano, L. Vuilleumier, J. .l. Wilquet, G. Wonsak, B. Yoon, C. .s. Zemskova, S. mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2015
Rivista:	PHYSICAL REVIEW LETTERS
Abstract:	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 .
Handle:	http://hdl.handle.net/11386/4649703
Appare nelle tipologie:	1.1.1 Articolo su rivista con DOI

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