New results on νμ → ντ appearance with the OPERA experiment in the CNGS beam

Agafonova, N.; Aleksandrov, A.; Anokhina, A.; Aoki, S.; Ariga, A.; Ariga, T.; Asada, T.; Autiero, D.; Badertscher, A.; Ben Dhahbi, A.; Bender, D.; Bertolin, A.; Bozza, C.; Brugnera, R.; Brunetti, G.; Buettner, B.; Buontempo, S.; Chaussard, L.; Chernyavskiy, M.; Chiarella, V.; Chukanov, A.; Consiglio, L.; D'Ambrosio, N.; Sanchez, P.; De Lellis, G.; De Serio, M.; Di Crescenzo, A.; Di Ferdinando, D.; Di Marco, N.; Dmitrievski, S.; Dracos, M.; Duchesneau, D.; Dusini, S.; Ebert, J.; Ereditato, A.; Favier, J.; Ferber, T.; Fini, R.; Fukuda, T.; Garfagnini, A.; Giacomelli, G.; Goellnitz, C.; Goldberg, J.; Gornushkin, Y.; Grella, G.; Grianti, F.; GÜLER, ALİ; Gustavino, C.; Hagner, C.; Hakamata, K.; Hara, T.; Hayakawa, T.; Hierholzer, M.; Hollnagel, A.; Hosseini, B.; Ishida, H.; Ishiguro, K.; Ishikawa, M.; Jakovcic, K.; Jollet, C.; Kamiscioglu, ÇAĞIN; Kamiscioglu, M.; Katsuragawa, T.; Kawahara, H.; Kawada, J.; Kim, J.; Kim, S.; Kimura, M.; Kitagawa, N.; Klicek, B.; Kodama, K.; Komatsu, M.; Kose, U.; Kreslo, I.; Lauria, A.; Lenkeit, J.; Ljubicic, A.; Longhin, A.; Loverre, P.; Malgin, A.; Mandrioli, G.; Marteau, J.; Matsuo, T.; Matveev, V.; Mauri, N.; Medinaceli, E.; Meregaglia, A.; Migliozzi, P.; Mikado, S.; Minotti, A.; Miyanishi, M.; Miyashita, E.; Monacelli, P.; Montesi, M.; Morishima, K.; Muciaccia, M.; Naganawa, N.; Naka, T.; Nakamura, M.; Nakano, T.; Nakatsuka, Y.; Niwa, K.; Ogawa, S.; Okateva, N.; Olshevsky, A.; Omura, T.; Ozaki, K.; Paoloni, A.; Park, B.; Park, I.; Pastore, A.; Patrizii, L.; Pennacchio, E.; Pessard, H.; Pistillo, C.; Podgrudkov, D.; Polukhina, N.; Pozzato, M.; Pretzl, K.; Pupilli, F.; Rescigno, R.; Roda, M.; Roganova, T.; Rokujo, H.; Rosa, G.; Rostovtseva, I.; Rubbia, A.; Russo, A.; Ryazhskaya, O.; Sato, O.; Sato, Y.; Schembri, A.; Schmidt-Parzefall, W.; Shakiryanova, I.; Schcedrina, T.; Sheshukov, A.; Shibuya, H.; Shiraishi, T.; Shoziyoev, G.; Simone, S.; Sioli, M.; Sirignano, C.; Sirri, G.; Spinetti, M.; Stanco, L.; Starkov, N.; Stellacci, S.; Stipcevic, M.; Strauss, T.; Strolin, P.; Suzuki, K.; Takahashi, S.; Tenti, M.; Terranova, F.; Tioukov, V.; Tolun, P.; Tufanli, S.; Vilain, P.; Vladimirov, M.; Votano, L.; Vuilleumier, J.; Wilquet, G.; Wonsak, B.; Yoon, C.; Yoshida, J.; Yoshimoto, M.; Zaitsev, Y.; Zemskova, S.; Zghiche, A.

doi:10.1007/jhep11(2013)036

New results on νμ → ντ appearance with the OPERA experiment in the CNGS beam

Atıf İçin Kopyala

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

Journal of High Energy Physics, cilt.2013, sa.11, 2013 (SCI-Expanded)

Yayın Türü: Makale / Derleme
Cilt numarası: 2013 Sayı: 11
Basım Tarihi: 2013
Doi Numarası: 10.1007/jhep11(2013)036
Dergi Adı: Journal of High Energy Physics
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Anahtar Kelimeler: Oscillation, Neutrino Detectors and Telescopes, NEUTRINO OSCILLATIONS, EMULSION, SYSTEM, EVENT
Ankara Üniversitesi Adresli: Evet

Özet

The OPERA neutrino experiment is designed to perform the first observation of neutrino oscillations in direct appearance mode in the νμ → ντ channel, via the detection of the τ-leptons created in charged current ντ interactions. The detector, located in the underground Gran Sasso Laboratory, consists of an emulsion/lead target with an average mass of about 1.2 kt, complemented by electronic detectors. It is exposed to the CERN Neutrinos to Gran Sasso beam, with a baseline of 730 km and a mean energy of 17GeV. The observation of the first ντ candidate event and the analysis of the 2008-2009 neutrino sample have been reported in previous publications. This work describes substantial improvements in the analysis and in the evaluation of the detection efficiencies and backgrounds using new simulation tools. The analysis is extended to a sub-sample of 2010 and 2011 data, resulting from an electronic detector-based pre-selection, in which an additional ντ candidate has been observed. The significance of the two events in terms of a νμ → ντ oscillation signal is of 2.40σ.