Ab initio calculation of muon capture on 24Mg
Jokiniemi, L., Miyagi, T., Stroberg, S. R., Holt, J. D., Kotila, J., & Suhonen, J. (2023). Ab initio calculation of muon capture on 24Mg. Physical Review C, 107(1), Article 014327. https://doi.org/10.1103/PhysRevC.107.014327
Published inPhysical Review C
©2023 American Physical Society
In this work we study ordinary muon capture (OMC) on 24Mg from a first-principles perspective. Starting from a particular two- and three-nucleon interaction derived from chiral effective field theory, we use the valence-space in-medium similarity renormalization group (VS-IMSRG) framework to construct effective Hamiltonians and muon-capture operators, which nonperturbatively account for many-body physics outside the valence space. The obtained nuclear matrix elements are compared against those from the phenomenological shell model. The impact of including the correlations from the nuclear shell model (NSM) as well as including the induced two-body part is studied in detail. Furthermore, the effects of realistic bound-muon wave function on the operators is studied. Finally, predictions for capture rates to the lowest excited states in 24Na are given and compared with available data. It is found that the spectroscopic properties of 24Mg and its OMC daughter 24Na are fairly well described by both the NSM and VS-IMSRG, and that the effect of the hadronic two-body currents significantly reduces the OMC rates. Both models have some difficulties in matching the measured OMC rates, especially for the 2+ final states. This calls for further studies in other light nuclei with available OMC data. ...
PublisherAmerican Physical Society (APS)
ISSN Search the Publication Forum2469-9985
Publication in research information system
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Related funder(s)Academy of Finland
Funding program(s)Research costs of Academy Research Fellow, AoF; Academy Research Fellow, AoF; Academy Project, AoF
Additional information about fundingWe thank J. Menéndez and B. S. Hu for helpful discussions. This work was supported by the Finnish Cultural Foundation Grant No. 00210067, NSERC under Grants No. SAPIN-2018-00027 and No. RGPAS-2018-522453, the Arthur B. McDonald Canadian Astroparticle Physics Research Institute, the US Department of Energy (DOE) under Contracts No. DE-FG02-97ER41014 and No. DE-AC02-06CH11357, Academy of Finland (Grants No. 314733, No. 320062, No. 345869, and No. 318043), and the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – Project-ID 279384907 – SFB 1245. TRIUMF receives funding via a contribution through the National Research Council of Canada. Computations were performed with an allocation of computing resources on Cedar at WestGrid and Compute Canada, and on the Oak Cluster at TRIUMF managed by the University of British Columbia department of Advanced Research Computing (ARC). ...
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