Abstract
Precision measurements of β-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 β-decay of 6He 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.
| Original language | American English |
|---|---|
| Article number | 137259 |
| Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
| Volume | 832 |
| DOIs | |
| State | Published - 10 Sep 2022 |
Bibliographical note
Funding Information:This work was initiated as a result of the stimulating environment at the ECT* workshop “Precise beta decay calculations for searches for new physics” in Trento. We wish to acknowledge the support of the ISF grant no. 1446/16 (DGazit and AGM), the Swedish Research Council, Grant Nos. 2017-04234 (CF and DGazda) and 2021-04507 (CF), the Czech Science Foundation GAČR grants Nos. 19-19640S and 22-14497S (DGazda), and the NSERC Grants No. SAPIN-2016-00033 (PG and PN) and PGSD3-535536-2019 (PG). AGM's research was partially supported by a scholarship sponsored by the Ministry of Science & Technology, Israel. TRIUMF receives federal funding via a contribution agreement with the National Research Council of Canada. Computing support came from an INCITE Award on the Summit supercomputer of the Oak Ridge Leadership Computing Facility (OLCF) at ORNL, and from Westgrid and Compute Canada. Parts of the computations and data handling were enabled by resources provided by the Swedish National Infrastructure for Computing (SNIC) at Chalmers Centre for Computational Science and Engineering (C3SE), the National Supercomputer Centre (NSC) partially funded by the Swedish Research Council through grant agreement no. 2018-05973. Additional computational resources were supplied by the project “e-Infrastruktura CZ” (e-INFRA CZ LM2018140) supported by the Ministry of Education, Youth and Sports of the Czech Republic and IT4Innovations at Czech National Supercomputing Center under project number OPEN-24-21 1892.
Funding Information:
This work was initiated as a result of the stimulating environment at the ECT* workshop “Precise beta decay calculations for searches for new physics” in Trento. We wish to acknowledge the support of the ISF grant no. 1446/16 (DGazit and AGM), the Swedish Research Council , Grant Nos. 2017-04234 (CF and DGazda) and 2021-04507 (CF), the Czech Science Foundation GAČR grants Nos. 19-19640S and 22-14497S (DGazda), and the NSERC Grants No. SAPIN-2016-00033 (PG and PN) and PGSD3-535536-2019 (PG). AGM's research was partially supported by a scholarship sponsored by the Ministry of Science & Technology, Israel. TRIUMF receives federal funding via a contribution agreement with the National Research Council of Canada. Computing support came from an INCITE Award on the Summit supercomputer of the Oak Ridge Leadership Computing Facility (OLCF) at ORNL, and from Westgrid and Compute Canada. Parts of the computations and data handling were enabled by resources provided by the Swedish National Infrastructure for Computing (SNIC) at Chalmers Centre for Computational Science and Engineering (C3SE), the National Supercomputer Centre (NSC) partially funded by the Swedish Research Council through grant agreement no. 2018-05973 . Additional computational resources were supplied by the project “e-Infrastruktura CZ” (e-INFRA CZ LM2018140) supported by the Ministry of Education, Youth and Sports of the Czech Republic and IT4Innovations at Czech National Supercomputing Center under project number OPEN-24-21 1892 .
Publisher Copyright:
© 2022 The Author(s)