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arXiv 1802.07908hep-ph
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涨落超高能重离子碰撞中粲夸克平衡的检验

Testing Charm Quark Equilibration in Ultra-High Energy Heavy Ion Collisions with Fluctuations

Thorben Graf, Jan Steinheimer, Christoph Herold, Marcus Bleicher

摘要:

最近格点量子色动力学研究为探索早期夸克-胶子等离子体(QGP)相的Charm夸克平衡提供了机会。在这里,我们建议使用的晶格数据的第二和第四阶净的Charm磁化率来推断的Charm夸克的平衡温度和相应的体积,在早期QGP阶段,通过实验测量的多重性波动的组合分析。此外,给出了二阶和四阶Charm夸克态率及其比值的第一微扰结果。

英文摘要:

Recent lattice QCD data on higher order susceptibilities of Charm quarks provide the opportunity to explore Charm quark equilibration in the early quark gluon plasma (QGP) phase. Here, we propose to use the lattice data on second and fourth order net Charm susceptibilities to infer the Charm quark equilibration temperature and the corresponding volume, in the early QGP stage, via a combined analysis of experimentally measured multiplicity fluctuations. Furthermore, the first perturbative results for the second and fourth order Charm quark susceptibilities and their ratio are presented.

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