标题： 屏蔽数和阻尼在夸克-胶子等离子体中的红外敏感性 显示英文标题

标题： The Infrared Sensitivity of Screening and Damping in a Quark-Gluon Plasma

摘要： 所有由于红外奇异性而对夸克-胶子等离子体准粒子色散关系具有敏感性的次领头阶贡献都是通过Braaten-Pisarski重求和方法计算的。 这些相对阶为$g\ln(g)$的修正在这里被显示通常会对等离子体频率以下频率的胶子场的动力学屏蔽以及传播的胶子和费米子准粒子的阻尼产生贡献。 在波矢趋于零的极限下，红外奇异性消失，但以一种可能使Braaten-Pisarski方案的更高阶项在波矢与磁质量尺度相当或更小时同样在次领头阶上做出贡献的方式。 这被认为尤其对于费米子的阻尼率是一个问题。 显示英文摘要

摘要： All the next-to-leading order contributions to the quasi-particle dispersion laws of a quark-gluon plasma which due to infrared singularities are sensitive to the magnetic-mass scale are calculated using Braaten-Pisarski resummation. These relative-order-$g\ln(g)$ corrections are shown here to generally contribute to the dynamical screening of gluonic fields with frequencies below the plasma frequency as well as to the damping of propagating gluonic and fermionic quasi-particles. In the limit of vanishing wave-vector the infrared singularities disappear, but in a way that raises the possibility for formally higher orders of the Braaten-Pisarski scheme to equally contribute at next-to-leading order when the wave-vector is of the order of or less than the magnetic-mass scale. This is argued to be a problem in particular for the fermionic damping rate.