SMuK 2021 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 26: Invited Talks - V

HK 26.3: Hauptvortrag

Freitag, 3. September 2021, 12:00–12:30, H1

BSM physics in hadronic and nuclear beta decays: challenges and opportunities — •Chien Yeah Seng — Helmholtz-Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics, Universität Bonn, 53115 Bonn, Germany

In the past years, several significant anomalies have been observed in the beta decay of mesons, nucleon and nuclei, which make them promising avenues for the search of the physics beyond the Standard Model (BSM). However, the current significant level of the observed anomalies is not yet sufficient to declare a discovery, and the major limiting factor is the precision level of the Standard Model (SM) theory inputs instead of experiments. In this talk, I will describe the major theory improvements needed to increase the significance level of the existing beta decay anomalies to 5 standard deviations, assuming that BSM physics is the underlying reason. They include high-precision studies of radiative corrections, isospin-breaking corrections and nuclear structure corrections to various beta decay processes.