Can the PREX-2 and CREX results be understood by relativistic mean-field models with the astrophysical constraints?
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866910744042274816 |
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| author | Miyatsu, Tsuyoshi Cheoun, Myung-Ki Kim, Kyungsik Saito, Koichi |
| author_facet | Miyatsu, Tsuyoshi Cheoun, Myung-Ki Kim, Kyungsik Saito, Koichi |
| contents | We construct new effective interactions using the relativistic mean-field models with the isoscalar- and isovector-meson mixing, $σ^{2}\bmδ^{2}$ and $ω_μω^μ\bmρ_ν\bmρ^ν$. Taking into account the particle flow data in heavy-ion collisions, the observed mass of PSR J0740$+$6620, and the tidal deformability of a neutron star from binary merger events, GW170817 and GW190814, we study the ground-state properties of finite, closed-shell nuclei, and try to explain the recent results from the PREX-2 and CREX experiments. It is found that the $σ$--$δ$ mixing is very powerful to understand the terrestrial experiments and astrophysical observations of neutron stars self-consistently. We can predict the large neutron skin thickness of $^{208}$Pb, $R_{\rm skin}^{208}=0.243$~fm, using the slope parameter of nuclear symmetry energy, $L=70$~MeV, which is consistent with the PREX-2 result. However, to explain the CREX data, it is preferable to adopt the small value of $L=20$~MeV. It is very difficult to understand the PREX-2 and CREX results simultaneously within relativistic mean-field models. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2303_14763 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Can the PREX-2 and CREX results be understood by relativistic mean-field models with the astrophysical constraints? Miyatsu, Tsuyoshi Cheoun, Myung-Ki Kim, Kyungsik Saito, Koichi Nuclear Theory We construct new effective interactions using the relativistic mean-field models with the isoscalar- and isovector-meson mixing, $σ^{2}\bmδ^{2}$ and $ω_μω^μ\bmρ_ν\bmρ^ν$. Taking into account the particle flow data in heavy-ion collisions, the observed mass of PSR J0740$+$6620, and the tidal deformability of a neutron star from binary merger events, GW170817 and GW190814, we study the ground-state properties of finite, closed-shell nuclei, and try to explain the recent results from the PREX-2 and CREX experiments. It is found that the $σ$--$δ$ mixing is very powerful to understand the terrestrial experiments and astrophysical observations of neutron stars self-consistently. We can predict the large neutron skin thickness of $^{208}$Pb, $R_{\rm skin}^{208}=0.243$~fm, using the slope parameter of nuclear symmetry energy, $L=70$~MeV, which is consistent with the PREX-2 result. However, to explain the CREX data, it is preferable to adopt the small value of $L=20$~MeV. It is very difficult to understand the PREX-2 and CREX results simultaneously within relativistic mean-field models. |
| title | Can the PREX-2 and CREX results be understood by relativistic mean-field models with the astrophysical constraints? |
| topic | Nuclear Theory |
| url | https://arxiv.org/abs/2303.14763 |