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arXiv 1508.06504hep-ph
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关于物质和胶动力学与重子数涨落的关联

On the relevance of matter and glue dynamics for baryon number fluctuations

Wei-jie Fu, Jan M. Pawlowski

摘要:

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和非平凡的色散,夸克和介子的动量尺度依赖。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,与通常的图象相反,在有约束胶背景的情况下,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。

英文摘要:

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 non-trivial 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 colourless baryonic one. Instead, the dominance of colourless hadronic states is obtained in a subtle interplay of quark and glue contributions to the canonical potential.

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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