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arXiv 0706.3549hep-lathep-ph
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有限密度格点量子色动力学临界点的存在性

On the existence of the critical point in finite density lattice QCD

Shinji Ejiri

摘要:

提出了一种基于有效势随平均元格变化的研究方法,来研究有限温度和密度下格点量子色动力学的相变性质。我们分析了用p4改进的交错夸克和裸夸克质量$m/T = 0.4$模拟双味QCD的数据,发现在高密度区$μ_q/T \simge 2.5$出现了一级相变线.我们还讨论了夸克化学势和同位旋化学势为非零时QCD相结构的差异。

英文摘要:

We propose a method to probe the nature of phase transitions in lattice QCD at finite temperature and density, which is based on the investigation of an effective potential as a function of the average plaquette. We analyze data obtained in a simulation of two-flavor QCD using p4-improved staggered quarks with bare quark mass $m/T = 0.4$, and find that a first order phase transition line appears in the high density regime for $μ_q/T \simge 2.5$. We also discuss the difference between the phase structures of QCD with non-zero quark chemical potential and non-zero isospin chemical potential.

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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