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T: Fachverband Teilchenphysik

T 8: Neutrinophysik V

T 8.6: Vortrag

Montag, 19. März 2018, 17:25–17:40, Z6 - HS 0.001

Search for keV-scale sterile Neutrinos with the first Light of KATRIN — •Anton Huber¹, Guido Drexlin¹, Susanne Mertens^2,4, and Thierry Lasserrre³ for the KATRIN collaboration — ¹Karlsruhe Institut für Technology (KIT), ETP, Postfach 3640, 76021 Karlsruhe — ²Max-Planck-Institut für Physik, München — ³Technische Universität München — ⁴Centre CEA de Saclay, Paris

Sterile neutrinos in the keV-mass regime are a viable dark matter candidate. A sterile neutrino with a mass up to 18.6 keV would be visible in the beta-decay spectrum of tritium as a minuscule kink-like signature and distortion. The KATRIN experiment is designed to determine the absolute neutrinos mass by measuring the beta-decay spectrum of gaseous tritium close to its endpoint. Beyond that, it's unprecedented tritium source luminosity and spectroscopic quality could be used to measure the entire beta-spectrum to search for a kink-like signature of a sterile neutrino. The idea discussed in this talk is a so-called Phase-0 measurement, where the first light data of KATRIN would be used to scan the entire tritium beta-decay spectrum to search for sterile neutrinos. A measurement of only one week with KATRIN has the potential to improve the current laboratory limits for keV-scale sterile neutrinos. This work presents the expected sensitivity, important systematic effects and the experimental realization of this experiment. This work was supported by GRK1694, BMBF (05A17VK2), KSETA, the HGF and the Friedrich-Ebert-Stiftung.