标题： 规范结构与硬热环的半经典方面 显示英文标题

标题： Gauge Structure and Semi-Classical Aspects of Hard Thermal Loops

摘要： 硬热环在夸克-胶子等离子体长波长激发的理论中起着核心作用。 我们在本文中展示了如何从Dyson-Schwinger方程最近推导出的生成泛函，揭示了它们的半经典性质和显著的规范结构。 特别是，我们表明我们的动力学方程可以表示为具有零曲率的辅助规范场。 值得注意的是，后一性质完全决定了硬热环运动学区域的动力学。 这特别解释了为什么生成泛函可以由Taylor和Wong通过规范不变性考虑得到。 它还阐明了Chern-Simons理论在此背景中的作用。 显示英文摘要

摘要： Hard thermal loops play a central role in the theory of long wavelength excitations of a quark-gluon plasma. We show in this paper how our recent derivation of their generating functional from the Dyson-Schwinger equations sheds light on their semi-classical nature and their remarkable gauge structure. In particular, we show that our kinetic equations can be written in terms of auxiliary gauge fields with zero curvature. Remarkably, the latter property determines entirely the dynamics in the kinematical regime of hard thermal loops. This explains in particular why the generating functional could have been obtained by Taylor and Wong from gauge invariance considerations. It also clarifies the role of Chern-Simons theory in this context.