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T: Fachverband Teilchenphysik

T 45: Neutrino Physics III

T 45.3: Talk

Wednesday, March 18, 2026, 16:45–17:00, AudiMax

Sterile-neutrino search based on 259 days of KATRIN data — •Xaver Stribl and Susanne Mertens for the KATRIN collaboration — Max-Planck-Institut für Kernphysik, Heidelberg, Deutschland

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 result of the light sterile neutrino analysis of the first five KATRIN measurement campaigns. To handle the computational challenge, a neural network is used. The obtained result is compared to results from other experiments and anomalies in the field of light sterile neutrinos.

Keywords: Sterile neutrinos; Neutrinos; KATRIN; Neural network