Off-diagonal kinetic theory in ultrasoft momentum region at high temperature
Off-diagonal kinetic theory in ultrasoft momentum region at high temperature
复制标题
高温超软动量区非对角动力学理论
DOI：
10.1103/physrevd.85.116009
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发表时间：
2012
影响因子：
5
通讯作者：
Y. Hidaka
中科院分区：
文献类型：
--
作者：
D. Satow;Y. Hidaka
本文从Yukawa模型中的Kadanoff-Baym方程和量子电动力学（QED）出发，导出了极高时具有超软动量的费米子激发的线性化动力学方程，其中耦合常数为。我们证明了该方程与用于分析首阶超软动量费米子谱的微扰理论中的自洽方程是等价的。此外，我们还导出了在QED中确定一对具有超软动量的费米子和（）玻色子的点函数的方程。
We derive a linearized kinetic equation for fermionic excitations with an ultrasoft momentum,, from the Kadanoff-Baym equation in a Yukawa model and quantum electrodynamics (QED) at extremely high, whereis the coupling constant. We show that this equation is equivalent to the self-consistent equation in the resummed perturbation theory used in the analysis of the fermion spectrum with the ultrasoft momentum at the leading order. Furthermore, we derive the equation that determines the-point function with external lines for a pair of fermions and () bosons with ultrasoft momenta in QED.