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arXiv 1202.0758hep-phhep-thnucl-th
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涨落对QCD物质的影响

The Impact of Fluctuations on QCD Matter

Tina Katharina Herbst, Jan M. Pawlowski, Bernd-Jochen Schaefer

摘要:

在动力学Polyakov圈-扩展夸克-介子模型中,研究了有限温度和密度下量子涨落和热涨落对QCD相结构的影响以及QCD相结构的质量依赖性.胶动力学模拟的Polyakov回路的潜力,也包括回耦合的物质部门的胶动力学。在手征极限下,大化学势低温下的手征相变分裂为两个相变分支。对于非零π介子质量的手征跃迁在小化学势的变化从一个相变交叉。最后,我们讨论了一个系统的改进,目前的模型完全QCD。

英文摘要:

We study the effect of quantum and thermal fluctuations as well as the mass dependence of the phase structure of QCD at finite temperature and density within a dynamical Polyakov-loop--extended quark-meson model. The glue dynamics is simulated by the Polyakov-loop potential, also including the back-coupling of the matter sector to the glue dynamics. In the chiral limit, the chiral phase transition at large chemical potential and low temperature splits into two transition branches. For non-vanishing pion masses the chiral transition at small chemical potential changes from a phase transition to a crossover. We close with a discussion of a systematical improvement of the current model towards full QCD.

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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