More results from the OPERA experiment



Galati, G, Agafonova, N, Aleksandrov, A, Anokhina, A, Aoki, S, Ariga, A, Ariga, T, Bender, D, Bertolin, A, Bodnarchuk, I
et al (show 122 more authors) (2017) More results from the OPERA experiment. NUOVO CIMENTO C-COLLOQUIA AND COMMUNICATIONS IN PHYSICS, 40 (5). ISSN 2037-4909, 1826-9885

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Abstract

The OPERA experiment reached its main goal by proving the appearance of v<inf>τ</inf> in the CNGS v<inf>μ</inf> beam. Five v<inf>τ</inf> candidates were detected with a S/B ratio of ∼ 10, allowing to reject the null hypothesis at 5.1σ. The search has been extended by loosening the selection criteria in order to improve the statistical uncertainty. One of the v<inf>τ</inf> candidates selected with the new strategy shows a double vertex topology and, after a dedicated multivariate analysis, is compatible with being a v<inf>Tτ</inf> interaction with charm production. Based on the enlarged data sample the estimation of Δm<sup>2</sup><inf>2</inf>3 in appearance mode is being performed. The search for v<inf>e</inf> interactions has been extended over the full data set with a more than twofold increase in statistics: data are compatible with the non-oscillation hypothesis in the three-flavour mixing model. The implications of the electron neutrino sample in the framework of the 3+1 sterile mode will lead to exclusion limits on sin<sup>2</sup> 2θ<inf>μe</inf>. Finally, the analysis of the annual modulation of cosmic muons is introduced.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 12 Jan 2018 11:21
Last Modified: 13 Jun 2025 13:51
DOI: 10.1393/ncc/i2017-17160-0
Related Websites:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3015943