论文标题
全息QCD手性相变的分析研究
Analytic Study on Chiral Phase Transition in Holographic QCD
论文作者
论文摘要
手性对称性破坏（$χ_{sb} $）是QCD中最根本的问题之一。在本文中，我们在Einstein-Maxwell-Dilaton（EMD）系统的双重偶动QCD模型中分析夸克凝结系统，该系统耦合到一个探针标量场。我们发现，EMD系统中的黑洞相变严重影响$χ_{SB} $。在微小的化学潜力下，$χ_{SB} $表现为跨界。对于大型化学势$μ>μ_c$，$χ_{sb} $变为第一阶，其过渡温度与旁路机制的黑洞相变完全相同。我们获得的相图在质量上与晶格QCD模拟和NJL模型的最新结果一致。
The chiral symmetry breaking ($χ_{SB}$) is one of the most fundamental problems in QCD. In this paper, we calculate quark condensation analytically in a holographic QCD model dual to the Einstein-Maxwell-Dilaton (EMD) system coupled to a probe scalar field. We find that the black hole phase transition in the EMD system seriously affects $χ_{SB}$. At small chemical potential, $χ_{SB}$ behaves as a crossover. For large chemical potential $μ>μ_c$, $χ_{SB}$ becomes first order with exactly the same transition temperature as the black hole phase transition by a bypass mechanism. The phase diagram we obtained is qualitatively consistent with the recent results from lattice QCD simulations and NJL models.
