CREX- and PREX-II-motivated relativistic interactions and their implications for the bulk properties of nuclear matter and neutron stars

被引：16

作者：

Kumar, Mukul ^{[1
]}

Kumar, Sunil ^{[1
]}

Thakur, Virender ^{[1
]}

Kumar, Raj ^{[1
]}

Agrawal, B. K. ^{[2
]}

Dhiman, Shashi K. ^{[1
,3
]}

机构：

[1] Himachal Pradesh Univ, Dept Phys, Shimla 171005, India

[2] Saha Inst Nucl Phys, 1-AF Bidhannagar, Kolkata 700064, India

[3] Himachal Pradesh Tech Univ, Sch Appl Sci, Hamirpur 177001, India

来源：

PHYSICAL REVIEW C | 2023年 / 107卷 / 05期

关键词：

EQUATION-OF-STATE; GROUND-STATE; DENSITY; RADII;

D O I：

10.1103/PhysRevC.107.055801

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We investigate the implications of parity-violating electron scattering experiment on neutron skin thickness of 48Ca [calcium radius experiment (CREX)] and 208Pb [lead radius experiment (PREX-II)] data on the bulk properties of finite nuclei, nuclear matter, and neutron stars. The neutron skin thickness from the CREX and PREX-II data is employed to constrain the parameters of relativistic mean-field models which includes different nonlinear, self-and cross-couplings among isoscalar-scalar a, isoscalar-vector w, isovector-scalar 8, and isovector-vector p meson fields up to the quartic order. Three parametrizations of RMF model are proposed by fitting CREX, PREX-II, and both CREX as well as PREX-II data to assess their implications. A covariance analysis is performed to assess the theoretical uncertainties of model parameters and nuclear matter observables along with correlations among them. The RMF model parametrization obtained with the CREX data acquires much smaller value of symmetry energy (J = 28.97 +/- 0.99 MeV) and its slope parameter (L = 30.61 +/- 6.74 MeV) in comparison to those obtained with PREX-II data. The neutron star properties are studied by employing the equations of state composed of nucleons and leptons in equilibrium.

引用

页数：15

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