Nuclear ab initio calculations of .sup.6./sup.He β-decay for beyond the Standard Model studies

0561291 - ÚJF 2023 RIV NL eng J - Journal Article
Glick-Magid, A. - Forssen, C. - Gazda, Daniel - Gazit, D. - Gysbers, P. - Navratil, P.
Nuclear ab initio calculations of ⁶He β-decay for beyond the Standard Model studies.
Physics Letters. B. Roč. 832, SEP (2022), č. článku 137259. ISSN 0370-2693. E-ISSN 1873-2445
R&D Projects: GA ČR GA19-19640S; GA ČR GA22-14497S
Research Infrastructure: e-INFRA CZ - 90140
Institutional support: RVO:61389005
Keywords : ab initio * beta-decay * Standard Model studies
OECD category: Nuclear physics
Impact factor: 4.3, year: 2022
Method of publishing: Open access
https://doi.org/10.1016/j.physletb.2022.137259

Precision measurements of beta-decay observables offer the possibility to search for deviations from the Standard Model. A possible discovery of such deviations requires accompanying first-principles calculations. Here we compute the nuclear structure corrections for the beta-decay of He-6 which is of central interest in several experimental efforts. We employ the impulse approximation together with wave functions calculated using the ab initio no-core shell model with potentials based on chiral effective field theory. We use these state-of-the-art calculations to give a novel and comprehensive analysis of theoretical uncertainties. We find that nuclear corrections, which we compute within the sensitivity of future experiments, create significant deviation from the naive Gamow-Teller predictions, making their accurate assessment essential in searches for physics beyond the Standard Model.
Permanent Link: https://hdl.handle.net/11104/0333981