标题： 相对论布吕克纳-哈特里-福克模型中核物质的性质与高精度电荷依赖势 显示英文标题

标题： Properties of nuclear matter in relativistic Brueckner-Hartree-Fock model with high-precision charge-dependent potentials

摘要： 核物质的性质在相对论Brueckner-Hartree-Fock模型框架下进行研究，使用最新的高精度电荷依赖的Bonn（pvCD-Bonn）势，其中介子和核子之间的耦合采用赝矢量形式。 这些真实的pvCD-Bonn势被重整化为有效的核子-核子（$NN$）相互作用， $G$矩阵。 它们是通过在核介质中求解Blankenbecler-Sugar（BbS）方程得到的。 然后，利用pvCD-Bonn A、B、C势计算对称核物质的饱和性质。 核子的结合能大约在饱和密度下为$-10.72$ MeV 到$-16.83$ MeV，分别对应这三个势的范围是$0.139$ fm$^{-3}$到$0.192$ fm$^{-3}$。这明显表明，与赝标耦合相比，介子和核子之间的赝矢量耦合可以产生合理的饱和性质。 此外，这些饱和性质与$NN$势的张量分量有很强的相关性，即氘核的$D$态概率，$P_D$用于形成相对论性的Coester带。 此外，从这些高精度电荷依赖势的部分波贡献中还讨论了核物质中的电荷对称性破缺（CSB）和电荷独立性破缺（CIB）效应。 一般来说，从$nn$和$pp$势能之间的差异得到的CSB幅度约为$0.05$兆电子伏特，而从$np$和$pp$势能之间的差异得到的CIB幅度约为$0.35$兆电子伏特。最后，也使用不同的不对称参数计算了不对称核物质的状态方程。发现，在富含中子的物质中，有效中子质量大于质子质量。 显示英文摘要

摘要： Properties of nuclear matter are investigated in the framework of relativistic Brueckner-Hartree-Fock model with the latest high-precision charge-dependent Bonn (pvCD-Bonn) potentials, where the coupling between pion and nucleon is adopted as pseudovector form. These realistic pvCD-Bonn potentials are renormalized to effective nucleon-nucleon ($NN$) interactions, $G$ matrices. They are obtained by solving the Blankenbecler-Sugar (BbS) equation in nuclear medium. Then, the saturation properties of symmetric nuclear matter are calculated with pvCD-Bonn A, B, C potentials. The energies per nucleon are around $-10.72$ MeV to $-16.83$ MeV at saturation densities, $0.139$ fm$^{-3}$ to $0.192$ fm$^{-3}$ with these three potentials, respectively. It clearly demonstrates that the pseudovector coupling between pion and nucleon can generate reasonable saturation properties comparing with pseudoscalar coupling. Furthermore, these saturation properties have strong correlations with the tensor components of $NN$ potentials, i.e., the $D$-state probabilities of deuteron, $P_D$ to form a relativistic Coester band. In addition, the charge symmetry breaking (CSB) and charge independence breaking (CIB) effects are also discussed in nuclear matter from the partial wave contributions with these high-precision charge-dependent potentials. In general, the magnitudes of CSB from the differences between $nn$ and $pp$ potentials are about $0.05$ MeV, while those of CIB are around $0.35$ MeV from the differences between $np$ and $pp$ potentials. Finally, the equations of state of asymmetric nuclear matter are also calculated with different asymmetry parameters. It is found that the effective neutron mass is larger than the proton one in neutron-rich matter.