Novel features of asymmetric nuclear matter from terrestrial experiments and astrophysical observations of neutron stars
The accurate measurement of neutron skin thickness of 208Pb by the PREX Collaboration suggests a large value of the nuclear symmetry energy slope parameter, L, whereas the smaller L is preferred to account for the small neutron-star radii from NICER observations. To resolve this discrepancy between...
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Frontiers Media S.A.
2025-02-01
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| Series: | Frontiers in Physics |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fphy.2024.1531475/full |
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| author | Tsuyoshi Miyatsu Myung-Ki Cheoun Kyungsik Kim Koichi Saito |
| author_facet | Tsuyoshi Miyatsu Myung-Ki Cheoun Kyungsik Kim Koichi Saito |
| author_sort | Tsuyoshi Miyatsu |
| collection | DOAJ |
| description | The accurate measurement of neutron skin thickness of 208Pb by the PREX Collaboration suggests a large value of the nuclear symmetry energy slope parameter, L, whereas the smaller L is preferred to account for the small neutron-star radii from NICER observations. To resolve this discrepancy between nuclear experiments and astrophysical observations, new effective interactions have been developed using relativistic mean-field models with the isoscalar- and isovector-meson mixing. We investigate the effects of δ-nucleon coupling and σ–δ mixing on the ground-state properties of finite nuclei, as well as the characteristics of isospin-asymmetric nuclear matter and neutron stars. Additionally, we explore the role of the quartic ρ-meson self-interaction in dense nuclear matter to mitigate the stiff equation of state for neutron stars resulting from the large δ-nucleon coupling. It is found that the nuclear symmetry energy undergoes a sudden softening at approximately twice the saturation density of nuclear matter, taking into account the PREX-2 result, the recent NICER observation of PSR J0437−4715, and the binary neutron star merger, GW170817. |
| format | Article |
| id | doaj-art-faf4dd88a9dc47cc9cd729674449cace |
| institution | Kabale University |
| issn | 2296-424X |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Physics |
| spelling | doaj-art-faf4dd88a9dc47cc9cd729674449cace2025-02-06T14:00:05ZengFrontiers Media S.A.Frontiers in Physics2296-424X2025-02-011210.3389/fphy.2024.15314751531475Novel features of asymmetric nuclear matter from terrestrial experiments and astrophysical observations of neutron starsTsuyoshi Miyatsu0Myung-Ki Cheoun1Kyungsik Kim2Koichi Saito3Department of Physics and Origin of Matter and Evolution of Galaxies Institute, Soongsil University, Seoul, Republic of KoreaDepartment of Physics and Origin of Matter and Evolution of Galaxies Institute, Soongsil University, Seoul, Republic of KoreaSchool of Liberal Arts and Sciences, Korea Aerospace University, Goyang, Republic of KoreaDepartment of Physics and Astronomy, Faculty of Science and Technology, Tokyo University of Science, Noda, JapanThe accurate measurement of neutron skin thickness of 208Pb by the PREX Collaboration suggests a large value of the nuclear symmetry energy slope parameter, L, whereas the smaller L is preferred to account for the small neutron-star radii from NICER observations. To resolve this discrepancy between nuclear experiments and astrophysical observations, new effective interactions have been developed using relativistic mean-field models with the isoscalar- and isovector-meson mixing. We investigate the effects of δ-nucleon coupling and σ–δ mixing on the ground-state properties of finite nuclei, as well as the characteristics of isospin-asymmetric nuclear matter and neutron stars. Additionally, we explore the role of the quartic ρ-meson self-interaction in dense nuclear matter to mitigate the stiff equation of state for neutron stars resulting from the large δ-nucleon coupling. It is found that the nuclear symmetry energy undergoes a sudden softening at approximately twice the saturation density of nuclear matter, taking into account the PREX-2 result, the recent NICER observation of PSR J0437−4715, and the binary neutron star merger, GW170817.https://www.frontiersin.org/articles/10.3389/fphy.2024.1531475/fullisospin-asymmetric nuclear matterneutron skin thicknessneutron starsNICERnuclear equation of statenuclear symmetry energy |
| spellingShingle | Tsuyoshi Miyatsu Myung-Ki Cheoun Kyungsik Kim Koichi Saito Novel features of asymmetric nuclear matter from terrestrial experiments and astrophysical observations of neutron stars Frontiers in Physics isospin-asymmetric nuclear matter neutron skin thickness neutron stars NICER nuclear equation of state nuclear symmetry energy |
| title | Novel features of asymmetric nuclear matter from terrestrial experiments and astrophysical observations of neutron stars |
| title_full | Novel features of asymmetric nuclear matter from terrestrial experiments and astrophysical observations of neutron stars |
| title_fullStr | Novel features of asymmetric nuclear matter from terrestrial experiments and astrophysical observations of neutron stars |
| title_full_unstemmed | Novel features of asymmetric nuclear matter from terrestrial experiments and astrophysical observations of neutron stars |
| title_short | Novel features of asymmetric nuclear matter from terrestrial experiments and astrophysical observations of neutron stars |
| title_sort | novel features of asymmetric nuclear matter from terrestrial experiments and astrophysical observations of neutron stars |
| topic | isospin-asymmetric nuclear matter neutron skin thickness neutron stars NICER nuclear equation of state nuclear symmetry energy |
| url | https://www.frontiersin.org/articles/10.3389/fphy.2024.1531475/full |
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