Speaker
Description
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. on the effective electron-neutrino mass; the latest step in an on-going 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, sterile neutrinos and 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. This poster will give an overview of the GNI framework and analysis, and present further GNI studies.