论文标题
领先日志的热QCD剪切粘度
Hot and Dense QCD Shear Viscosity at Leading Log
论文作者
论文摘要
QCD的前阶弱耦合剪切粘度大约在20年前计算出来，近代领先顺序的扩展为4年。 但是，尽管中间能力重离子碰撞和合并中子星可以在巴里昂化学势很大的制度中探索夸克 - 胶状等离子体，但这些结果从未在有限的重子化学势$ $ $上应用于有限的重度化学势$μ$。 在这里，我们将领先的剪切粘度计算扩展到有限的$μ$，我们认为弱耦合膨胀的收敛性虽然可疑的等离子体值应比$μ> t $ bed $μ= 0 $更好。
The leading-order weak-coupling shear viscosity of QCD was computed almost 20 years ago, and the extension to next-to-leading order is 4 years old. But these results have never been applied at finite baryon chemical potential $μ$, despite the fact that intermediate-energy heavy ion collisions and merging neutron stars may explore the Quark-Gluon Plasma in a regime where baryon chemical potentials are large. Here we extend the leading-log shear viscosity calculation to finite $μ$, and we argue that the convergence of the weak-coupling expansion, while questionable for achievable plasmas, should be better at $μ> T$ than at $μ=0$.
