中性双味夸克物质的中微子发射率和体粘滞系数
Neutrino emissivities and bulk viscosity in neutral two-flavor quark matter
摘要：
在NJL型手征夸克模型中研究了紧致星约束下双味超导夸克物质各向同性色自旋锁定（iso-CSL）相的热力学和输运性质.手征对称性破缺和向超导夸克物质的相变导致夸克质量、化学势和双夸克能隙的密度依赖性变化。这些物理量的自洽处理影响输运性质的微观计算。我们提出的iso-CSL直接URCA发射率和体粘滞度的结果，这满足来自冷却和旋转演化的紧凑型恒星的夸克物质的约束。我们比较我们的结果与现象学上的成功，但启发式2SC+X阶段。我们表明，微观成立的iso-CSL阶段可以取代纯粹的唯象2SC+X阶段在现代模拟的冷却演化的致密星与彩色超导夸克物质内部。
英文摘要：
We study thermodynamic and transport properties for the isotropic color-spin-locking (iso-CSL) phase of two-flavor superconducting quark matter under compact star constraints within a NJL-type chiral quark model. Chiral symmetry breaking and the phase transition to superconducting quark matter leads to a density dependent change of quark masses, chemical potentials and diquark gap. A self-consistent treatment of these physical quantities influences on the microscopic calculations of transport properties. We present results for the iso-CSL direct URCA emissivities and bulk viscosities, which fulfill the constraints on quark matter derived from cooling and rotational evolution of compact stars. We compare our results with the phenomenologically successful, but yet heuristic 2SC+X phase. We show that the microscopically founded iso-CSL phase can replace the purely phenomenological 2SC+X phase in modern simulations of the cooling evolution for compact stars with color superconducting quark matter interior.
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