论文标题
手性对称恢复和中子星中的$δ$物质形成
Chiral symmetry restoration and the $Δ$ matter formation in neutron stars
论文作者
论文摘要
我们分析了手性对称性恢复在辐射物质中的影响，包括基于奇偶元模型的最低的lane子谐振$δ$。我们研究了$δ$及其手性伴侣在$β$平衡和电荷中立的中子星（NS）条件下的密集物质状态（EOS）方程中的作用。我们发现，由于手性对称性的部分恢复，$δ$事物的早期发作驱动的EOS的软化允许在质量，半径和潮汐变形性上适应现代的多通电剂天体物理约束。饱和密度上方的软化伴随着在高密度下的随后僵硬。我们还发现，随着$δ$ baryons在辐射物质中排斥相互作用的变化，NS核中的物质组成可能有所不同。
We analyze the effects of chiral symmetry restoration in hadronic matter, including the lowest-lying baryonic resonance $Δ$ based on the parity doublet model. We study the role of $Δ$ and its chiral partner on the equation of state (EoS) of dense matter under neutron star (NS) conditions of $β$-equilibrium and charge neutrality. We find that the softening of the EoS driven by the early onset of $Δ$ matter due to partial restoration of chiral symmetry allows accommodating the modern multi-messenger astrophysical constraints on the mass, radius, and tidal deformability. The softening above the saturation density is accompanied by subsequent stiffening at high densities. We also find that the matter composition in the NS cores may be different upon variations of the repulsive interactions of $Δ$ baryons in hadronic matter.
