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arXiv 0911.0296hep-ph
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QCD热力学:用格点量子色动力学对抗Polyakov夸克介子模型

QCD Thermodynamics: Confronting the Polyakov-Quark-Meson Model with Lattice QCD

Jochen Wambach, Bernd-Jochen Schaefer, Mathias Wagner

摘要:

NJL型有效模型代表了QCD的低能实现,并包含了相关的方面,如手征对称性及其自发破缺,重夸克极限下的中心对称性以及轴向异常。为了研究强相互作用物质的相结构,我们引入了一个这样的模型,即三种轻夸克味的Polyakov夸克介子模型。随着最近的高统计格点量子色动力学模拟的有限温度状态方程,与模型结果的详细比较变得容易。这样的比较允许估计体积和截断效应的数量,在晶格上获得,并提供可能的晶格外推程序有限的化学势,这是重要的,以定位在QCD相图中的关键端点。

英文摘要:

NJL-type effective models represent a low-energy realization of QCD and incorporate pertinent aspects such as chiral symmetry and its spontaneous breaking, the center symmetry in the heavy-quark limit as well as the axial anomaly. One such model, the Polyakov-quark-meson model for three light quark flavors, is introduced in order to study the phase structure of strongly-interacting matter. With recent high-statistics lattice QCD simulations of the finite-temperature equation of state, a detailed comparison with model results becomes accessible. Such comparisons allow to estimate volume and truncation effects of quantities, obtained on the lattice and provide possible lattice extrapolation procedures to finite chemical potential which are important to locate a critical endpoint in the QCD phase diagram.

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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