Ab initio calculation of muon capture on 24Mg
Year of publication
2023
Authors
Jokiniemi, L.; Miyagi, T.; Stroberg, S. R.; Holt, J. D.; Kotila, J.; Suhonen, J.
Abstract
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.
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Publication type
Publication format
Article
Parent publication type
Journal
Article type
Original article
Audience
ScientificPeer-reviewed
Peer-ReviewedMINEDU's publication type classification code
A1 Journal article (refereed), original researchPublication channel information
Journal
Publisher
Volume
107
Issue
1
Article number
014327
ISSN
Publication forum
Publication forum level
2
Open access
Open access in the publisher’s service
No
Self-archived
Yes
Other information
Fields of science
Physical sciences
Keywords
[object Object]
Publication country
United States
Internationality of the publisher
International
Language
English
International co-publication
Yes
Co-publication with a company
No
DOI
10.1103/PhysRevC.107.014327
The publication is included in the Ministry of Education and Culture’s Publication data collection
Yes