The OPERA neutrino experiment in the underground Gran Sasso Laboratory (LNGS) was designed to perform the ﬁrst detection of neutrino oscillations in direct appearance mode in the νµ → ντ channel, the ντ signature being the identiﬁcation of the τ-lepton created in its charged current interaction. The hybrid apparatus consists of a large mass emulsion ﬁlm/lead target complemented by electronic detectors. Placed in the LNGS, it is exposed to the high-energy long-baseline CERN Neutrino beam to Gran Sasso (CNGS) 730 km away from the neutrino source. The observation of a ﬁrst ντ candidate event was reported in 2010. In this paper, we discuss the result of the analysis of the data taken during the ﬁrst two years of operation (2008–2009) underlining the major improvements brought to the analysis chain and to the Monte Carlo simulations. The statistical signiﬁcance of the one event observed so far is then evaluated to 95%.
|Titolo:||Search for nu-mu - nu-tau oscillation with the OPERA experiment in the CNGS beam|
|Autori interni:||BOZZA, Cristiano|
STELLACCI, SIMONA MARIA
|Data di pubblicazione:||2012|
|Rivista:||NEW JOURNAL OF PHYSICS|
|Appare nelle tipologie:||1.1.2 Articolo su rivista con ISSN|