Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 16: Neutrino Physics I

T 16.5: Vortrag

Montag, 31. März 2025, 17:45–18:00, VG 3.103

Studies on general neutrino interactions with the KATRIN experiment — •Hanna Henke and Caroline Fengler for the KATRIN collaboration — Institute for Astroparticle Physics, Karlsruhe Institute of Technology, Karlsruhe, Germany

The KATRIN Experiment aims to determine the neutrino mass using precision spectroscopy of electrons from tritium β-decay. Recently, KATRIN published an improved upper bound of 0.45 eV at 90% C.L. [1] on the effective electron-neutrino mass; the latest step in an ongoing effort to reach a target sensitivity of below 0.3 eV. Supplementary to the neutrino mass measurement the high-precision spectroscopy allows to probe beyond standard model physics, for instance general neutrino interactions (GNI), which can be examined through shape deformations in the integral β-energy spectrum. For the GNI a model-independent approach combines each theoretically allowed interaction term into one effective field theory to describe the impact of energy-dependent spectrum contributions as an indicator for novel weak processes. Recently, first constraints on general neutrino interactions based on KATRIN data were released [2]. This talk will give an overview of the GNI framework and analysis, and present further GNI studies.

This work is supported by the Helmholtz Association, through the Helmholtz Initiative and Networking Fund (grant no. W2/W3-118), and by BMBF (grant no. 05A23PMA, 05A23PX2, 05A23VK2 and 05A23WO6)

[1] arXiv:2406.13516, [2] arXiv:2410.13895

Keywords: KATRIN; Neutrino; BSM