论文标题
密度功能方法以限制和颜色超导为夸克物质
Density functional approach to quark matter with confinement and color superconductivity
论文作者
论文摘要
我们提出了一种新型的相对论密度功能方法，以模拟夸张的机制来建模夸克物质。 Quarks的准粒子处理可提供抑制，这是由于已经在平均场水平上的夸克自身自身自养生而抑制。我们证明我们的方法等同于具有中等依赖耦合的手性夸克模型。通过构建密度功能来确保手性对称性的动力恢复。补充了矢量排斥和diquark配对，该模型用于构建冷紧凑型明星物质的混合夸克 - 戴隆EOS。我们研究了这种混合EOS与出色的质量 - 拉迪乌斯关系和潮汐变形性的联系。将模型结果与各种观察性约束进行比较，包括PSR J0740+6620的较好半径测量以及GW170817的潮汐变形性约束。该模型被证明与约束是一致的，仍然可以通过调整向量排斥和diquark配对耦合来进一步改进。
We present a novel relativistic density-functional approach to modeling quark matter with a mechanism to mimic confinement. The quasiparticle treatment of quarks provides their suppression due to a large quark selfenergy already at the mean-field level. We demonstrate that our approach is equivalent to a chiral quark model with medium-dependent couplings. The dynamical restoration of the chiral symmetry is ensured by construction of the density functional. Supplemented with the vector repulsion and diquark pairing the model is applied to construct a hybrid quark-hadron EoS of cold compact-star matter. We study the connection of such a hybrid EoS with the stellar mass-radius relation and tidal deformability. The model results are compared to various observational constraints including the NICER radius measurement of PSR J0740+6620 and the tidal deformability constraint from GW170817. The model is shown to be consistent with the constraints, still allowing for further improvement by adjusting the vector repulsion and diquark pairing couplings.
