Relevance of matter and glue dynamics for baryon number fluctuations
Relevance of matter and glue dynamics for baryon number fluctuations
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DOI：
10.1103/physrevd.92.116006
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发表时间：
2015-08
影响因子：
5
通讯作者：
Wei-jie Fu;J. Pawlowski
中科院分区：
文献类型：
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作者：
Wei-jie Fu;J. Pawlowski
我们研究了物质和胶动力学对重子数涨落和重子数分布峰度的影响。这是在QCD改进的低能有效模型的框架内完成的。特别是，我们包括夸克介子散射的动量尺度依赖性和夸克和介子的非平凡色散。在胶子方面，我们考虑了物质部门对胶水动力学的反作用。结果表明，上述涨落导致了重子数涨落的更快变化，以及与手征交叉的峰度。我们还研究了低能QCD中夸克禁闭的特征。结果表明，与通常的情况相反，在有束缚胶背景的情况下，有效热分布并不趋向于无色重子分布。相反，无色强子态的主导地位是在夸克和胶对正则势的贡献的微妙相互作用中获得的。
We investigate the impact of the matter and glue dynamics on baryon number fluctuations and the kurtosis of baryon number distribution. This is done within the framework of QCD-improved low-energy effective models. In particular, we include the momentum scale dependence of the quark-meson scattering and the nontrivial dispersions of both quarks and mesons. On the gluonic side, we take into account the backreaction of the matter sector on the glue dynamics. It is shown that the above fluctuations lead to a more rapid change of the baryon number fluctuations as well as the kurtosis of with the chiral crossover. We also study the signatures of quark confinement in low-energy QCD. It is shown that, contrary to the common picture, the effective thermal distribution in the presence of confining glue backgrounds does not tend towards the colorless baryonic one. Instead, the dominance of colorless hadronic states is obtained in a subtle interplay of quark and glue contributions to the canonical potential.