We investigate the chiral phase structure of quark matter with spheroidal momentum-space anisotropy specified by one anisotropy parameter in the 2+1 flavor quark-meson model. We find that the chiral phase diagram and the location of the critical endpoint (CEP) are significantly affected by the value of . With an increase in , the CEP is shifted to lower temperatures and higher quark chemical potentials. In addition, the temperature of the CEP is more sensitive to the anisotropy parameter than the corresponding quark chemical potential, which is the opposite to that from the finite system volume effect. The effects of the momentum anisotropy on the thermodynamic properties and scalar (pseudoscalar) meson masses are also studied at the vanishing quark chemical potential. The numerical results reveal that an increase in can hinder the restoration of chiral symmetry. We also find that shear viscosity and electrical conductivity decrease as increases. However, the bulk viscosity exhibits a significant non-trivial behavior with in the entire temperature domain of interest.

我们研究了具有球形动量空间各向异性的夸克物质的手性相结构，该结构由2+1 风味夸克介子模型中的一个各向异性参数指定。我们发现手性相图和关键端点 (CEP) 的位置受 值的显着影响。随着增加，CEP 转移到较低的温度和较高的夸克化学势。此外，CEP 的温度对各向异性参数的敏感性高于相应的夸克化学势，这与有限系统体积效应相反。在消失的夸克化学势下，也研究了动量各向异性对热力学性质和标量（伪标量）介子质量的影响。数值结果表明，增加会阻碍手性对称性的恢复。我们还发现剪切粘度和电导率随着增加而降低。然而，体积粘度在整个感兴趣的温度域中表现出显着的非平凡行为。