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首页> 外文期刊>Physical review, C >Excluded-volume model for quarkyonic matter. II. Three-flavor shell-like distribution of baryons in phase space
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Excluded-volume model for quarkyonic matter. II. Three-flavor shell-like distribution of baryons in phase space

机译：Quarkyonic物质的排除卷模型。 II。 在相空间中的三芳旋钮的三种风格壳分布

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摘要

We extend the excluded-volume model of isospin symmetric two-flavor dense quarkyonic matter [Phys. Rev. C 101, 035201 (2020)] including strange particles and address its implications for neutron stars. The effective sizes of baryons are defined from the diverging hard-core potentials in the short interdistance regime. Around the hard-core density, the repulsive core between baryons at short distances leads to a saturation in the number density of baryons and generates perturbative quarks from the lower phase space, which leads to the shell-like distribution of baryons by the Pauli exclusion principle. The strange-quark Fermi sea always appears at high densities but the A hyperon shell only appears when the effective size of the A hyperon is smaller than the effective size of nucleons. We find that the pressure of strange quarkyonic matter can be large enough to support neutron stars with two times solar mass and can have a large sound speed, c(s)(2) similar or equal to 0.7. The fraction of the baryon number carried by perturbative quarks is about 30% at the inner core of most massive neutron stars.
机译：我们扩展了同位旋对称双味稠密夸克子物质[Phys.Rev.C 101，035201（2020）]的排除体积模型，包括奇异粒子，并讨论了它对中子星的影响。重子的有效尺寸由短间隔区内的发散硬核势定义。在硬核密度附近，短距离重子之间的排斥核导致重子数密度饱和，并从较低的相空间产生微扰夸克，从而根据泡利排斥原理导致重子的壳层状分布。奇怪的夸克费米海总是在高密度下出现，但只有当超子的有效尺寸小于核子的有效尺寸时，才会出现超子壳层。我们发现奇异夸克子物质的压力可以大到足以支撑两倍太阳质量的中子星，并且可以有一个大的声速，c（s）（2）类似或等于0.7。在大多数大质量中子星的内核中，微扰夸克携带的重子数的分数约为30%。

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