Search for sterile neutrino mixing in the muon neutrino to tau neutrino appearance channel with the OPERA detector

14th International Conference on Topics in Astroparticle and Underground Physics

物理学;天文学

Di Crescenzo, A.^1

INFN Napoli, Napoli

1-80125, Italy^1

关键词: Charged current;    Decay topology;    Exposed to;    Mixing parameters;    Muon neutrino;    Neutrino sources;    Sterile neutrinos;    Tau neutrino appearance;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/718/6/062016/pdf
DOI  :  10.1088/1742-6596/718/6/062016

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

The OPERA experiment observed νμ→ ντoscillations in the atmospheric sector. To this purpose the hybrid OPERA detector was exposed to the CERN Neutrinos to Gran Sasso beam from 2008 to 2012, at a distance of 730 km from the neutrino source. Charged-current interactions of ντwere searched for through the identification of τ lepton decay topologies. The five observed ντinteractions are consistent with the expected number of events in the standard three neutrino framework. Based on this result, new limits on the mixing parameters of a massive sterile neutrino may be set. Preliminary results of the analysis performed in the 3+1 neutrino framework are here presented.