Results from the OPERA experiment at the CNGS beamстатья
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Дата последнего поиска статьи во внешних источниках: 10 августа 2018 г.
Аннотация:The OPERA experiment at the Gran Sasso underground laboratory is searching
for νµ → ντ oscillations in appearance mode in the CNGS neutrino beam. Four ντ candidate
events have been found so far, using a sub-sample of data from the 2008-2012 runs. Given
the number of analysed events and the low background, νµ → ντ oscillations are established
with a significance of 4.2 σ. In this paper the data analysis is discussed, with emphasis on the
background constraints obtained using dedicated data-driven control samples. We present also
the analysis of the τ neutrino and electron neutrino data in the framework of the 3+1 sterile
neutrino model. The measurement of the muon charge ratio in the collected cosmic ray sample
is also reported.