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arXiv 1108.3231hep-ph
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有效手征模型中的非微扰动力学和电荷涨落

Non-perturbative dynamics and charge fluctuations in effective chiral models

V. Skokov, B. Friman, K. Redlich

摘要:

本文讨论了在有限温度和净重子密度为零的有效手征模型中手征交叉跃迁附近电荷涨落的性质。计算包括非微扰动力学内实现的功能重整化群的方法。我们研究了线性西格玛模型中电荷极化率的温度依赖性,并探讨了量子统计的作用。在Polyakov圈扩展的夸克-介子模型中,我们研究了夸克与介子以及夸克与有效胶子场的耦合对电荷涨落的影响。我们在电荷的涨落中发现了一个明显的手性交叉跃迁信号。因此,我们强调的作用,高阶累积量的探针的关键性有关的恢复手征对称性和解除禁闭。

英文摘要:

We discuss the properties of fluctuations of the electric charge in the vicinity of the chiral crossover transition within effective chiral models at finite temperature and vanishing net baryon density. The calculation includes non-perturbative dynamics implemented within the functional renormalization group approach. We study the temperature dependence of the electric charge susceptibilities in the linear sigma model and explore the role of quantum statistics. Within the Polyakov loop extended quark-meson model, we study the influence of the coupling of quarks to mesons and to an effective gluon field on charge fluctuations. We find a clear signal for the chiral crossover transition in the fluctuations of the electric charge. Accordingly, we stress the role of higher order cumulants as probes of criticality related to the restoration of chiral symmetry and deconfinement.

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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