arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0704.1647hep-ph
收藏

在强耦合夸克-胶子等离子体(sQGP)中,耗散效应产生了多少熵?

How much entropy is produced in strongly coupled Quark-Gluon Plasma (sQGP) by dissipative effects?

Michael Lublinsky, Edward Shuryak

摘要:

我们认为,估计耗散效应的基础上的一阶流体动力学剪切粘度是潜在的误导,因为高阶项的应力张量的耗散部分的梯度展开往往会减少它们。利用最近得到的热$\cal N$ =4超对称等离子体中的声音色散关系,计算了这些高阶项对RHIC/LHC碰撞中Bjorken展开的$resummed$效应.熵产生的减少被发现是实质性的,高达一个数量级。

英文摘要:

We argue that estimates of dissipative effects based on the first-order hydrodynamics with shear viscosity are potentially misleading because higher order terms in the gradient expansion of the dissipative part of the stress tensor tend to reduce them. Using recently obtained sound dispersion relation in thermal $\cal N$=4 supersymmetric plasma, we calculate the $resummed$ effect of these high order terms for Bjorken expansion appropriate to RHIC/LHC collisions. A reduction of entropy production is found to be substantial, up to an order of magnitude.

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。

↑