Baczyk, Pawel, Dobaczewski, Jacek orcid.org/0000-0002-4158-3770, Konieczka, Maciej et al. (3 more authors) (2018) Isospin-symmetry breaking in masses of N~Z nuclei. Physics Letters B : Particle Physics, Nuclear Physics and Cosmology. pp. 178-183. ISSN 0370-2693
Abstract
Effects of the isospin-symmetry breaking (ISB) beyond mean-field Coulomb terms are systematically studied in nuclear masses near the N=Z line. The Coulomb exchange contributions are calculated exactly. We use extended Skyrme energy density functionals (EDFs) with proton-neutron-mixed densities, to which we add new terms breaking the isospin symmetry. Two parameters associated with the new terms are determined by fitting mirror and triplet displacement energies (MDEs and TDEs) of isospin multiplets. The new EDFs reproduce MDEs for the T=1/2 doublets and T=1 triplets, and TDEs for the T=1 triplets. Relative strengths of the obtained isospin-symmetry-breaking terms are not consistent with the differences in the NN scattering lengths, ann, app, and anp. Based on low-energy experimental data, it seems thus impossible to delineate the strong-force ISB effects from beyond-mean-field Coulomb-energy corrections.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018, The Author(s). Letter 5 pages, 4 figures, Supplemental Material 4 pages, 6 figures; submitted to Physical Review Letters |
Keywords: | nucl-th |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Funding Information: | Funder Grant number SCIENCE AND TECHNOLOGY FACILITIES COUNCIL (STFC) ST/M006433/1 SCIENCE AND TECHNOLOGY FACILITIES COUNCIL (STFC) ST/P003885/1 |
Depositing User: | Pure (York) |
Date Deposited: | 30 Jan 2018 10:20 |
Last Modified: | 22 Feb 2025 00:04 |
Status: | Published |
Refereed: | Yes |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:111964 |
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