V. Helaine (LPSC-Grenoble)
7 decembre 2016, 11:00, salle de réunion du Bat 108
Search for a light sterile neutrino is currently a hot topic of neutrino physics, arising from the so-called gallium and reactor anomalies, in which a deficit of neutrinos was observed with respect to expectations. Such anomalies could be explained by short distance oscillations towards a sterile state, with ∆m 2 ∼1 eV2. The STEREO detector has been designed to track the electron anti-neutrino energy spectrum distortion from 3 to 8MeV due to such a new L/E oscillation, and should therefore confirm or reject the light sterile neutrino hypothesis. Electron anti-neutrinos produced by the compact reactor core of the Institut Laue-Langevin (ILL) will be detected in a 6-cells segmented volume of Gd-loaded liquid scintillator through the inverse β-decay process.
The STEREO detector has been set-up and commissioned in November 2016. The design of the detector and the status of the experiment will be presented, as well as its expected sensitivity.