Can the PREX-2 and CREX results be understood by relativistic mean-field models with the astrophysical constraints?open access
- Authors
- Miyatsu, Tsuyoshi; Cheoun, Myung-Ki; Kim, Kyungsik; Saito, Koichi
- Issue Date
- Aug-2023
- Publisher
- ELSEVIER
- Keywords
- Relativistic mean-field models; PREX-2 and CREX experiments; Isospin-asymmetric nuclear matter; Neutron stars
- Citation
- PHYSICS LETTERS B, v.843
- Journal Title
- PHYSICS LETTERS B
- Volume
- 843
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/44149
- DOI
- 10.1016/j.physletb.2023.138013
- ISSN
- 0370-2693
- Abstract
- We construct new effective interactions using the relativistic mean-field models with the isoscalar-and isovector-meson mixing, & sigma;252 and & omega;& mu;& omega;& mu;p & nu;p & nu;. 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 the binary merger event, GW170817, 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 & sigma;-& delta; 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 208Pb, R208 skin = 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.& COPY; 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons .org /licenses /by /4 .0/). Funded by SCOAP3.
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