论文标题
相对论的平均场模型中的不对称核物质，以及等轴和异摩 - 膜混合
Asymmetric nuclear matter in relativistic mean-field models with isoscalar- and isovector-meson mixing
论文作者
论文摘要
使用相对论的平均场模型与等轴和异卵形膜之间的非线性耦合，我们研究了同义 - 反对核物质的特性。 Not only the vector mixing, $ω_μω^μ\mathbfρ_ν\mathbfρ^ν$, but also the quartic interaction due to the scalar mesons, $σ^{2}\mathbfδ^{2}$, is taken into account to investigate the density dependence of nuclear symmetry energy, $E_{\rm sym}$, and the neutron-star properties.发现$δ$梅森在高密度下增加了$ e _ {\ rm sym} $，而$σ$ - $δ$混合使$ e _ {\ rm sym} $ soft y of饱和密度高于饱和密度。此外，$δ$介子及其混合对中子星的半径和潮汐变形性具有很大的影响。特别是，$σ$ - $δ$混合减少了中子星形半径，因此，目前的计算可以同时再现规范性的140万美元_ {\ odot} $中子的无限制潮汐变形，从binary Neutron Merger，GW1708170817和Compact comcact and and comcact and and and and coctact and and coctact and and coctact and coctact and coctact and coctact and and coctact。
Using the relativistic mean-field model with nonlinear couplings between the isoscalar and isovector mesons, we study the properties of isospin-asymmetric nuclear matter. Not only the vector mixing, $ω_μω^μ\mathbfρ_ν\mathbfρ^ν$, but also the quartic interaction due to the scalar mesons, $σ^{2}\mathbfδ^{2}$, is taken into account to investigate the density dependence of nuclear symmetry energy, $E_{\rm sym}$, and the neutron-star properties. It is found that the $δ$ meson increases $E_{\rm sym}$ at high densities, whereas the $σ$-$δ$ mixing makes $E_{\rm sym}$ soft above the saturation density. Furthermore, the $δ$ meson and its mixing have a large influence on the radius and tidal deformability of a neutron star. In particular, the $σ$-$δ$ mixing reduces the neutron-star radius, and, thus, the present calculation can simultaneously reproduce the dimensionless tidal deformabilities of a canonical $1.4M_{\odot}$ neutron star observed from the binary neutron star merger, GW170817, and from the compact binary coalescence, GW190814.
