论文标题
中子星的状态状态夸克跨界方程：在平等双重模型中限制手性不变质量
Quark-hadron crossover equations of state for neutron stars: constraining the chiral invariant mass in a parity doublet model
论文作者
论文摘要
我们通过在低密度下插值HADRONIC EOS插值，并在高密度下构建中子星的状态方程（EOS）。基于奇偶校验结构的HADRONIC模型用于HADRONIC物质，而Nambu-Jona-Lasinio类型的夸克模型用于夸克物质。我们假设在颜色味的锁定阶段，在辐射物质和夸克物质之间进行了交叉。平等双重模型的核子质量具有与手性对称性断裂相关的质量，并且对手性冷凝物不敏感的手性不变质量$ m_0 $。 $ M_0 $的值在低密度下影响核EOSS，并且与中子星的半径有很强的相关性。使用对Ligo-Virgo和Nicer获得的半径的约束，我们发现$ M_0 $被限制为$ 600 \，\ Mathrm {Mev} \ Lessim M_0 \ Lessim M_0 \ Lessim 900 \，\ Mathrm {Mev} $。
We construct an equation of state (EOS) for neutron stars by interpolating hadronic EOS at low density and quark EOS at high density. A hadronic model based on the parity doublet structure is used for hadronic matter and a quark model of Nambu--Jona-Lasinio type is for quark matter. We assume crossover between hadronic matter and quark matter in the the color-flavor locked phase. The nucleon mass of the parity doublet model has a mass associated with the chiral symmetry breaking, and a chiral invariant mass $m_0$ which is insensitive to the chiral condensate. The value of $m_0$ affects the nuclear EOSs at low density, and has strong correlations with the radii of neutron stars. Using the constraint to the radius obtained by LIGO-Virgo and NICER, we find that $m_0$ is restricted as $600\,\mathrm{MeV}\lesssim m_0 \lesssim 900\,\mathrm{MeV}$.
