论文标题
核物质参数的限制和相关性来自密度依赖性范德华模型
Constraints and correlations of nuclear matter parameters from a density-dependent van der Waals model
论文作者
论文摘要
在对称和不对称的核物质约束下，分析了一个最近提出的密度依赖性范德华模型，该模型仅针对固定结合能，饱和密度，对称能量和不可压缩性，该模型仅针对固定结合能，饱和密度，对称能量和不可压缩性。在上一篇论文中，结果表明，该模型与与二进制中子星合并事件相关的约束完全一致，并由Ligo和Pirgo协作报告。在这里，我们表明它还令人满意地描述了对称核物质的低密度和高密度区域，并满足了所有主要约束。我们还发现，在饱和密度下，不可压缩性和偏度参数之间存在线性相关性，并显示了与密度不可压缩性中呈现的交叉点的关系。 In the asymmetric matter regime, other linear correlations are found, namely, the one between the symmetry energy ($J$) and its slope ($L_0$), and other one establishing the symmetry energy curvature as a function of the combination given by $3J-L_0$.
A recently proposed density-dependent van der Waals model, with only $4$ free parameters adjusted to fix binding energy, saturation density, symmetry energy, and incompressibility, is analyzed under symmetric and asymmetric nuclear matter constraints. In a previous paper, it was shown that this model is fully consistent with the constraints related to the binary neutron star merger event named GW170817 and reported by the LIGO and Virgo collaboration. Here, we show that it also describes satisfactorily the low and high-density regions of symmetric nuclear matter, with all the main constraints satisfied. We also found a linear correlation between the incompressibility and the skewness parameter, both at the saturation density and show how it relates to the crossing point presented in the incompressibility as a function of the density. In the asymmetric matter regime, other linear correlations are found, namely, the one between the symmetry energy ($J$) and its slope ($L_0$), and other one establishing the symmetry energy curvature as a function of the combination given by $3J-L_0$.
