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arXiv 1301.2873hep-phhep-latnucl-th
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手征交叉跃迁附近的净夸克数几率分布

Net quark number probability distribution near the chiral crossover transition

Kenji Morita, Bengt Friman, Krzysztof Redlich, Vladimir Skokov

摘要:

研究了夸克-介子模型中手征交叉跃迁附近净夸克数的概率分布性质。的计算进行内的功能重整化群的方法,以及在平均场近似。我们发现,有一个基本的手征相变的概率分布的属性上的重大影响。特别是,对于物理π介子质量,包含介子涨落效应的分布与平均场分布和汤姆逊分布都有很大的不同。后者被认为是非关键行为的参考。净夸克数概率分布的一个特征是,在O(4)普适类中的手征交叉跃迁附近,它比相应的平均场和Reynlam函数窄。我们研究的概率分布的体积依赖性,以及由此产生的累积量,并讨论其近似的标度性质。

英文摘要:

We investigate properties of the probability distribution of the net quark number near the chiral crossover transition in the quark-meson model. The calculations are performed within the functional renormalization group approach, as well as in the mean-field approximation. We find, that there is a substantial influence of the underlying chiral phase transition on the properties of the probability distribution. In particular, for a physical pion mass, the distribution which includes the effect of mesonic fluctuations, differs considerably from both, the mean-field and Skellam distributions. The latter is considered as a reference for a non-critical behavior. A characteristic feature of the net quark number probability distribution is that, in the vicinity of the chiral crossover transition in the O(4) universality class, it is narrower than the corresponding mean-field and Skellam function. We study the volume dependence of the probability distribution, as well as the resulting cumulants, and discuss their approximate scaling properties.

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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