论文标题
恢复颜色超导夸克物质的共形限制在狭窄的密度功能方法中
Recovering the conformal limit of color superconducting quark matter within a confining density functional approach
论文作者
论文摘要
我们将最近提出的限制相对论密度功能的方法概括为密度依赖性矢量和diquark耦合的情况。这些耦合的特殊行为是由密集夸克物质中的非扰动gluon交换的动机，并在渐近高密度下提供了共形极限。我们证明，夸克物质EOS的这一特征与中子恒星内部典型的密度范围的显着刚度一致。为了对这些天体物理对象进行建模，我们构建了一个冷恒星物质的混合夸克 - 哈德隆家族。我们还以对中子恒星及其潮汐变形的质量关系的观察性约束来面对我们的方法，并争论以低于$ 1.0〜 {\ rm m} _ \ odot $的夸克物质发作。
We generalize a recently proposed confining relativistic density-functional approach to the case of density dependent vector and diquark couplings. The particular behavior of these couplings is motivated by the non-perturbative gluon exchange in dense quark matter and provides the conformal limit at asymptotically high densities. We demonstrate that this feature of the quark matter EoS is consistent with a significant stiffness in the density range typical for the interiors of neutron stars. In order to model these astrophysical objects we construct a family of hybrid quark-hadron EoSs of cold stellar matter. We also confront our approach with the observational constraints on the mass-radius relation of neutron stars and their tidal deformabilities and argue in favor of a quark matter onset at masses below $1.0~{\rm M}_\odot$
