Precise beta decay calculations for searches for new physics
Worldwide, several experiments are searching for physics beyond the Standard Model (BSM) by performing precision measurements of nuclear beta decay. These experiments aim at 0.1% precision, and will have comparable control over systematic uncertainties. Next generation experiments will surpass LHC constraints on models of BSM physics. In order to achieve the full potential of such experiments we need a Standard-Model prediction of the pertinent beta-decay observables of comparable accuracy. This involves consideration of corrections that have not previously been thoroughly investigated, e.g., the effect of the nuclear finite size on Coulomb interactions, radiative corrections to beta decay, recoil corrections, etc. For many of these an accurate result requires forefront nuclear-structure calculations. There is presently no coherent theoretical effort directed towards this goal. This workshop will be a first step in that direction.
Setting a plan for calculations aiming to interpret on going precision measurements of nuclear beta decays, searching for physics beyond the standard model (BSM), including:
- Current status of and future prospects for these experiments;
- Computing radiative corrections to nuclear beta decay;
- Connecting BSM physics to nuclear-structure calculations;
- Ab initio methods for beta decay, including quantification of theory uncertainties;
- How to calculate higher-order effects in the beta-decay matrix element, e.g., recoil effects.