Enhancing β-decay experimental searches for exotic weak interactions with accurate nuclear calculations*

An increasing body of evidence suggests that the Standard Model (SM) of particle physics is incomplete. Recent experiments showing deviations from the SM in high-precision measurements highlight the importance of the nuclear precision frontier in beyond the SM searches.

The talk will focus on the search for exotic weak interactions using β-decays precision measurements. It will describe the theory's challenge of nuclear calculations and present a general framework for assessing β-decay precision experiments. It will demonstrate how this formalism opens the door to new measurements, such as those of forbidden β-decays, as well as to highly accurate and controlled calculations of β-decay observables relevant to ongoing experiments. Using this formalism in conjunction with ab-initio nuclear calculations for 6He and 23NE decays and comparing them with newly available measurements, I will present some recent boundaries for tensor exotic weak interactions.