Final Results of the OPERA Experiment on nu(tau )Appearance In the CNGS Neutrino Beam

Agafonova, N.; Alexandrov, A.; Anokhina, A.; Aoki, S.; Ariga, A.; Ariga, T.; Bertolin, A.; Bozza, C.; Brugnera, R.; Buonaura, A.; Buontempo, S.; Chernyavskiy, M.; Chukanov, A.; Consiglio, L.; D'Ambrosio, N.; De Lellis, G.; De Serio, M.; Sanchez, P.; Di Crescenzo, A.; Di Ferdinando, D.; Di Marco, N.; Dmitrievsky, S.; Dracos, M.; Duchesneau, D.; Dusini, S.; Dzhatdoev, T.; Ebert, J.; Ereditato, A.; Favier, J.; Fini, R.; Fornari, F.; Fukuda, T.; Galati, G.; Garfagnini, A.; Gentile, V; Goldberg, J.; Gorbunov, S.; Gornushkin, Y.; Grella, G.; GÜLER, ALİ; Gustavino, C.; Hagner, C.; Hara, T.; Hayakawa, T.; Hollnagel, A.; Ishiguro, K.; Iuliano, A.; Jakovcic, K.; Jollet, C.; Kamiscioglu, C.; Kamiscioglu, MUSTAFA; Kim, S.; Kitagawa, N.; Klicek, B.; Kodama, K.; Komatsu, M.; Kose, U.; Kreslo, I; Laudisio, F.; Lauria, A.; Ljubicic, A.; Longhin, A.; Loverre, P.; Malenica, M.; Malgin, A.; Mandrioli, G.; Matsuo, T.; Matveev, V; Mauri, N.; Medinaceli, E.; Meregaglia, A.; Mikado, S.; Miyanishi, M.; Mizutani, F.; Monacelli, P.; Montesi, M.; Morishima, K.; Muciaccia, M.; Naganawa, N.; Naka, T.; Nakamura, M.; Nakano, T.; Niwa, K.; Ogawa, S.; Okateva, N.; Olchevsky, A.; Ozaki, K.; Paoloni, A.; Paparella, L.; Park, B.; 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.; Sadovsky, A.; Sato, O.; Schembri, A.; Shakiryanova, I; Shchedrina, T.; Shibayama, E.; Shibuya, H.; Shiraishi, T.; Simone, S.; Sirignano, C.; Sirri, G.; Sotnikov, A.; Spinetti, M.; Stanco, L.; Starkov, N.; Stellacci, S.; Stipcevic, M.; Strolin, P.; Takahashi, S.; Tenti, M.; Terranova, F.; Tioukov, V; Tufanli, S.; Ustyuzhanin, A.; Vasina, S.; Vilain, P.; Voevodina, E.; Votano, L.; Vuilleumier, J.; Wilquet, G.; Wonsak, B.; Yoon, C.

doi:10.1103/physrevlett.120.211801

Final Results of the OPERA Experiment on nu(tau )Appearance In the CNGS Neutrino Beam

Atıf İçin Kopyala

Agafonova N., Alexandrov A., Anokhina A., Aoki S., Ariga A., Ariga T., ...Daha Fazla

PHYSICAL REVIEW LETTERS, cilt.120, sa.21, 2018 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 120 Sayı: 21
Basım Tarihi: 2018
Doi Numarası: 10.1103/physrevlett.120.211801
Dergi Adı: PHYSICAL REVIEW LETTERS
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

The OPERA experiment was designed to study nu mu -> nu tau oscillations in the appearance mode in the CERN to Gran Sasso Neutrino beam (CNGS). In this Letter, we report the final analysis of the full data sample collected between 2008 and 2012, corresponding to 17.97 x 10(19) protons on target. Selection criteria looser than in previous analyses have produced ten nu(tau) candidate events, thus reducing the statistical uncertainty in the measurement of the oscillation parameters and of nu(tau) properties. A multivariate approach for event identification has been applied to the candidate events and the discovery of nu(tau) appearance is confirmed with an improved significance level of 6.1 sigma. |Delta m(32)(2)| has been measured, in appearance mode, with an accuracy of 20%. The measurement of the nu(tau) charged-current cross section, for the first ti me with a negligible contamination from p(z), and the first direct evidence for the nu(tau) lepton number are also reported.