论文标题
由于电子血浆中有限电子质量而导致的手性不对称平衡
Equilibration of the chiral asymmetry due to finite electron mass in electron-positron plasma
论文作者
论文摘要
我们计算超层次电子脉络体等离子体（也称为手性翻转速率）中轴向电荷的碰撞衰减速率。我们发现与现有估计值相反，手性翻转率已经以一阶在精细结构常数$α$中出现，因此比以前认为的数量级要大。快速放松轴向电荷的主要通道是弱阻尼光子和康普顿散射的共线发射。后者有助于$ \ MATHCAL {O}（α）$结果，因为其横截面的红外发散是由于热校正而在软尺度$ \ sim et $上正规化的。我们的结果对于描述早期宇宙过程（例如瘦生成或磁化）的描述很重要，这些过程影响了标准模型的左侧和右手式费物，如伴侣字母中的更多详细信息所讨论的。
We calculate the rate of collisional decay of the axial charge in an ultrarelativistic electron-positron plasma, also known as the chirality flipping rate. We find that contrary to the existing estimates, the chirality flipping rate appears already in the first order in the fine-structure constant $α$ and is therefore orders of magnitude greater than previously believed. The main channels for the rapid relaxation of the axial charge are the collinear emission of a weakly damped photon and the Compton scattering. The latter contributes to the $\mathcal{O}(α)$ result because of the infrared divergence in its cross section, which is regularized on the soft scale $\sim eT$ due to the thermal corrections. Our results are important for the description of the early Universe processes (such as leptogenesis or magnetogenesis) that affect differently left- and right-chiral fermions of the Standard Model, as discussed in more details in the companion Letter.
