arXiv 2204.050832022-04hep-phhep-latnucl-th

手征自旋对称性与QCD phase diagram

Chiral spin symmetry and the QCD phase diagram

Leonid Ya. Glozman, Owe Philipsen, Robert D. Pisarski

备注：: 12 pages, 6 figures, published version
DOI：: 10.1140/epja/s10050-022-00895-4

摘要：

用手征对称夸克的格点量子色动力学模拟最近建立了在高于手征交叉$T_\mathrm{ch}$的温度范围内量子有效作用量的近似$SU(2)_{CS}$和$SU(2N_F)$对称性，其中夸克之间的色电相互作用主导动力学。我们发现，这样的中间温度范围之间的手性断裂和等离子体制度是完全一致的公布的筛选质谱，这表明在部分子和手性自旋对称制度之间的交叉在$T_s\sim (2-3)T_\mathrm{ch}$的热微扰理论的故障。从已知的屏蔽质量与重子化学势的行为，我们定性地推导出如何手征自旋对称带扩展到QCD相图。在冷稠密区，我们提出宇称加倍重子作为手征自旋对称物质的可能候选者。这代表了一个特殊的情况下，夸克物质的限制和恢复手征对称性，并可以顺利地转化为夸克物质在足够高的密度。最后，我们讨论了双轻子谱的潜力，以确定这样的物质形式。

英文摘要：

Lattice QCD simulations with chirally symmetric quarks have recently established approximate $SU(2)_{CS}$ and $SU(2N_F)$ symmetries of the quantum effective action in a temperature range above the chiral crossover $T_\mathrm{ch}$, in which color-electric interactions between quarks dominate the dynamics. We show that such an intermediate temperature range between the chirally broken and plasma regimes is fully consistent with published screening mass spectra, which demonstrate the breakdown of thermal perturbation theory at the crossover between the partonic and the chiral spin symmetric regime at $T_s\sim (2-3)T_\mathrm{ch}$. From the known behavior of screening masses with baryon chemical potential, we deduce qualitatively how this chiral spin symmetric band extends into the QCD phase diagram. In the cold and dense region, we propose parity doubled baryons as possible candidates for chiral spin symmetric matter. This represents a special case of quarkyonic matter with confinement and restored chiral symmetry, and can smoothly transform to quark matter at sufficiently high densities. Finally, we discuss the potential of dilepton spectra to identify such matter forms.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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