Present status of the opera experiment for the direct observation of neutrino oscillations in the [nu]^sub [mu]^ [rarr] [nu]^sub [tau]^ channel

• Published in: Bulletin of the Russian Academy of Sciences. Physics Vol. 75; no. 3; p. 423
• Main Authors: Agafonova, N Yu, Aleksandrov, A B, Anokhina, A M, Vladimirov, M S, Gornushkin, Yu A, Dmitrievskii, S G, Dzhatdoev, T A, Enikeev, R I, Zemskova, S G, Mal'gin, A S, Matveev, V A, Naumov, D V, Nikitina, V V, Ol'shevskii, A G, Polukhina, N G, Roganova, T M, Ryazhskaya, O G, Ryasnyi, V G, Starkov, N I, Chernyavskii, M M, Chukanov, A V, Sheshukov, A S, Shozieev, G P, Yakushev, V F
• Format: Journal Article
• Language: English
• Published: New York Springer Nature B.V 01.03.2011
• Subjects: Charm (particle physics); Data acquisition; Detectors; Neutrinos; Oscillations; Scanning; Tracking devices
• ISSN: 1062-8738; 1934-9432
• DOI: 10.3103/S1062873811030051

The OPERA experiment (Oscillation Project with an Emulsion-Tracking Apparatus) for the direct observation of neutrino oscillations in the ν[mu] [rarr] ντ channel has been underway at the underground laboratory in Gran Sasso since 2007. In the course of data collection, more than 3000 ν[mu] interactions have been registered in emulsion detectors. Twenty charmed neutrino interaction candidates have been found. Multidimensional criteria have been developed in order to select ντ interactions against ν[mu] interactions accompanied by charmed hadron production. The first results from automated PAVIKOM emulsion scanning have been obtained. We discuss the measurements of the muon charge ratio of [mu]+ to [mu]-.