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arXiv 0906.4450hep-phhep-lat
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关于热QCD的最小屏蔽质量

On the smallest screening masses in hot QCD

M. Laine, M. Vepsalainen

摘要:

对非淬灭晶格模拟的日益关注也重新引起了人们对胶子屏蔽质量的兴趣,胶子屏蔽质量的逆是热非阿贝尔等离子体中热涨落相关的最长尺度。我们填补了一个明显的空白,在文献中有关的理论结构之一的相关筛选质量(一个等于两倍的德拜质量在领先的顺序),通过显示,下一个领先的顺序修正,它是微扰和小。这个令人惊讶的结果似乎半定量地解释了为什么这个特殊的通道在几百MeV左右的温度下产生最小的胶子屏蔽质量(它耦合到能量密度和波利雅科夫环的实部),即使它不是在渐近高温下最小的屏蔽质量之一。

英文摘要:

The increasing focus on unquenched lattice simulations has revived interest also in gluonic screening masses, whose inverses characterise the longest length scales at which thermal fluctuations are correlated in a hot non-Abelian plasma. We fill an apparent gap in the literature concerning the theoretical structure of one of the relevant screening masses (the one which equals twice the Debye mass at leading order), by showing that the next-to-leading order correction to it is perturbative and small. This surprising result appears to explain semi-quantitatively why this particular channel yields the smallest gluonic screening mass at temperatures around a few hundred MeV (it couples to the energy density and to the real part of the Polyakov loop), even though it is not among the smallest screening masses at asymptotically high temperatures.

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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