The OPERA experiment was designed to search for νμ→ντ oscillations in appearance mode, i.e., by detecting the τ leptons produced in charged current ντ interactions. The experiment took data from 2008 to 2012 in the CERN Neutrinos to Gran Sasso beam. The observation of the νμ→ντ appearance, achieved with four candidate events in a subsample of the data, was previously reported. In this Letter, a fifth ντ candidate event, found in an enlarged data sample, is described. Together with a further reduction of the expected background, the candidate events detected so far allow us to assess the discovery of νμ→ντ oscillations in appearance mode with a significance larger than 5σ.

Agafonova, N., Aleksandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., et al. (2015). Discovery of τ Neutrino Appearance in the CNGS Neutrino Beam with the OPERA Experiment. PHYSICAL REVIEW LETTERS, 115(12) [10.1103/PhysRevLett.115.121802].

Discovery of τ Neutrino Appearance in the CNGS Neutrino Beam with the OPERA Experiment

Tenti, M;TERRANOVA, FRANCESCO;
2015

Abstract

The OPERA experiment was designed to search for νμ→ντ oscillations in appearance mode, i.e., by detecting the τ leptons produced in charged current ντ interactions. The experiment took data from 2008 to 2012 in the CERN Neutrinos to Gran Sasso beam. The observation of the νμ→ντ appearance, achieved with four candidate events in a subsample of the data, was previously reported. In this Letter, a fifth ντ candidate event, found in an enlarged data sample, is described. Together with a further reduction of the expected background, the candidate events detected so far allow us to assess the discovery of νμ→ντ oscillations in appearance mode with a significance larger than 5σ.
Articolo in rivista - Articolo scientifico
Physics and Astronomy (all)
English
2015
115
12
121802
reserved
Agafonova, N., Aleksandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., et al. (2015). Discovery of τ Neutrino Appearance in the CNGS Neutrino Beam with the OPERA Experiment. PHYSICAL REVIEW LETTERS, 115(12) [10.1103/PhysRevLett.115.121802].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/93491
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