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T: Fachverband Teilchenphysik

T 108: Neutrinophysik 9 (sterile Neutrinos)

T 108.9: Vortrag

Donnerstag, 30. März 2017, 18:55–19:10, VSH 118

Background conditions of the first run period of the sterile neutrino search with STEREO — •Felix Kandzia — Institut Laue Langevin, Grenoble, France

Light sterile neutrinos are currently a topic of high interest in neutrino physics. One indication of their possible contribution to neutrino oscillations is the Reactor Antineutrino Anomaly, which unveiled a deficit of about 6% between predicted and observed neutrino fluxes in short baseline reactor experiments. The corresponding new oscillation parameters, obtained from global fits to reactor and beam experiments, result for electron antineutrinos from reactors (1 to 10 MeV) in oscillation lengths of a few meters. As a consequence several very short baseline oscillation experiments at reactors are currently in preparation or have already started.

The STEREO collaboration has commissioned a detector at about 10 m distance from the compact fuel element of the research reactor of the Institut Laue Langevin, Grenoble, France, in November 2016 and is continuously taking data since then. The STEREO detector is installed on ground level in the experimental hall of the reactor building. Nearby neutron beam experiments and cosmic radiation result in challenging background conditions which were compensated by passive and active shielding. In this talk the background situation of the first run period of STEREO will be presented as well as methods employed for background reduction in the data analysis.