Final results on νμ→ντ oscillation from the CHORUS experiment

EŞKUT, EDA; KAYIŞ TOPAKSU, AYSEL; Oenenguet, G.; van Beuzekom, M.; van Dantzig, R.; de Jong, M.; Konijn, J.; Melzer, O.; Oldeman, R.; Pesen, E.; van der Poel, C.; Visschers, J.; Gueler, ALİ; Koese, U.; Serin-Zeyrek, M.; Sever, R.; Tolun, P.; Zeyrek, MEHMET; Armenise, N.; Cassol, F.; Catanesi, M.; De Serio, M.; Muciaccia, M.; Radicioni, E.; Righini, P.; Simone, S.; Vivolo, L.; Buelte, A.; Winter, K.; Donckt, M.; De Vyver, B.; Vilain, P.; Wilquet, G.; Saitta, B.; Di Capua, E.; Luppi, C.; Ishii, Y.; Kazuno, M.; Ogawa, S.; Shibuya, H.; Brunner, J.; Chizhov, M.; Cussans, D.; Doucet, M.; Fabre, J.; Flegel, W.; Hristova, I.; Kawamura, T.; Kolev, D.; Litmaath, M.; Meinhard, H.; Niu, E.; Overds, H.; Panman, J.; Papadopoulos, I.; Ricciardi, S.; Rozanov, A.; Altzberg, D.; Tsenov, R.; Uiterwijk, J.; Weinheimer, C.; Wong, H.; Zucchelli, P.; Goldberg, J.; Chikawa, M.; Arik, E.; Mailov, A.; Song, J.; Yoon, C.; Kodama, K.; Ushida, N.; Aoki, S.; Hara, T.; Brooijmans, G.; Delbar, T.; Favart, D.; Gregoire, G.; Herin, J.; Kalinin, S.; Makhlioueva, I.; Artamonov, A.; Gorbunov, P.; Khovansky, V.; Shamanov, V.; Tsukerman, I.; Bonekaemper, D.; Bruski, N.; Frekers, D.; Rondeshagen, D.; Wolff, T.; Hoshino, K.; Kawada, J.; Komatsu, M.; Kotaka, Y.; Kozaki, T.; Miyanishi, M.; Nakamura, M.; Nakano, T.; Narita, K.; Niu, K.; Niwa, K.; Nonaka, N.; Obayashi, Y.; Sato, O.; Toshito, T.; Buontempo, S.; Cocco, A.; D'Ambrosio, N.; De Lellis, G.; De Rosa, G.; Di Capua, F.; Ereditato, A.; Fiorillo, G.; Marotta, A.; Messina, M.; Migliozzi, P.; Palladino, V.; Lavina, L.; Strolin, P.; Tioukov, V.; Nakamura, K.; Okusawa, T.; Capone, A.; De Pedis, D.; Di Liberto, S.; Dore, U.; Loverre, P.; Ludovici, L.; Maslennikov, A.; Mazzoni, M.; Piredda, G.; Rosa, G.; Santacesaria, R.; Satta, A.; Spada, F.; Barbuto, E.; Bozza, C.; Grella, G.; Romano, G.; Sirignano, C.; Sorrentino, S.; Sato, Y.; Tezuka, I.

doi:10.1016/j.nuclphysb.2007.10.023

Final results on νμ→ντ oscillation from the CHORUS experiment

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EŞKUT E., KAYIŞ TOPAKSU A., Oenenguet G., van Beuzekom M. G., van Dantzig R., de Jong M., ...More

NUCLEAR PHYSICS B, no.1-2, pp.326-343, 2008 (SCI-Expanded)

Publication Type: Article / Article
Publication Date: 2008
Doi Number: 10.1016/j.nuclphysb.2007.10.023
Journal Name: NUCLEAR PHYSICS B
Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Page Numbers: pp.326-343
Keywords: oscillation, neutrino, tau lepton appearance, NEUTRINO INTERACTIONS, SEARCH, NU(MU)->NU(TAU), NU(MU), NOMAD, LIGHT
Middle East Technical University Affiliated: Yes

Abstract

The final oscillation analysis of the complete set of data collected by CHORUS in the years 1994-1997 is presented. Reconstruction algorithms of data extracted by electronic detectors were improved and the data recorded in the emulsion target were analysed by new automated scanning systems, allowing the use of a new method for event reconstruction in emulsion. CHORUS has applied these new techniques to the sample of 1996-1997 events for which no muons were observed in the electronic detectors. Combining the new sample with the data analysed in previous papers, the overall sensitivity of the experiment to the nu(tau) appearance is thus improved. In a two-neutrino mixing scheme, a 90% C.L. upper limit of sin(2)2 theta(mu tau) < 4.4 x 10(-4) is set for large Delta m(2), improving by a factor 1.5 the previously published CHORUS result. (C) 2007 Elsevier B.V. All rights reserved.

Final results on ν<sub>μ</sub>→ν<sub>τ</sub> oscillation from the CHORUS experiment

Abstract