SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 37: Neutrinos, Dark Matter IV

T 37.2: Vortrag

Dienstag, 21. März 2023, 17:15–17:30, POT/0251

Search for Light Sterile Neutrinos with the KATRIN Experiment — •Xaver Stribl for the KATRIN collaboration — Chair for Dark Matter E47, Technical University of Munich

Light sterile neutrinos with a mass on the eV-scale could explain several anomalies observed in short-baseline oscillation experiments. The Karlsruhe Tritium Neutrino (KATRIN) experiment is designed to directly determine the effective electron anti-neutrino mass by measuring the tritium beta decay spectrum. The measured spectrum can also be investigated for the signature of light sterile neutrinos.
In this talk we present the status of the light sterile neutrino analysis of the KATRIN experiment. To handle the increasing computational challenge, a neural network is adapted for the analysis and its applicability is validated. This neural network is then used on Monte Carlo data sets to study the sensitivity of the first five measurement campaigns as well as the impact of individual systematic uncertainties. The obtained sensitivity is compared to current results and anomalies in the field of light sterile neutrinos.