论文标题
在热QCD中的电场上：扰动理论
On electric fields in hot QCD: perturbation theory
论文作者
论文摘要
我们通过领先的扰动理论研究了夸克热气对外部电场的响应。特别是，我们讨论如何在电场的存在下保持平衡并计算电敏感性，从而为任意夸克质量提供了高温膨胀。此外，我们指出，使用Schwinger的精确传播器获得的有效作用的弱场直接确定在零场的易感性和有效作用的弱场扩张之间存在不匹配。我们讨论了这种不匹配的起源，并详细介绍了我们对电场中完整QCD的概括。
We investigate the response of a hot gas of quarks to external electric fields via leading-order perturbation theory. In particular, we discuss how equilibrium is maintained in the presence of the electric field and calculate the electric susceptibility, providing its high-temperature expansion for arbitrary quark mass. Furthermore, we point out that there is a mismatch between this, direct determination of the susceptibility at zero field and the weak-field expansion of the effective action at nonzero electric fields, as obtained using Schwinger's exact propagator. We discuss the origin of this mismatch and elaborate on the generalization of our results to full QCD in electric fields.
