Speaker
Description
The KArlsruhe TRItium Neutrino (KATRIN) experiment is designed to determine the mass of the electron antineutrino by kinematic measurements of the tritium beta-decay with a target sensitivity of 0.2 eV$/c^2$ (90\% C.L.). In 2022, KATRIN reported the most stringent limit on the neutrino mass with $m_\nu < 0.8$ eV$/c^2$ (90$\%$ C.L) based on data acquired during the first two science runs of 2019. Along with the neutrino mass determination, the precise measurement of the beta-decay spectrum near the kinematic endpoint allows KATRIN to search for nonstandard or sterile neutrino with masses in the eV range.
In this talk we discuss the first results of the KATRIN searches for a sterile neutrino in the 3+1 model scenario, the analysis framework for the new datasets of the first five science runs and relevant systematic effects. The talk concludes with an outlook on KATRIN sensitivity to the eV-scale sterile neutrino from the new dataset in comparison to the results of other sterile neutrino searches.
| Collaboration / Activity | KATRIN collaboration |
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