论文标题
原始轴向电荷在宇宙时代的演变
Evolution of the Primordial Axial Charge across Cosmic Times
论文作者
论文摘要
我们研究了在温度10 MEV -100 GEV时电子 - 光子等离子体中轴向电荷的碰撞衰变。我们证明，轴向电荷的衰减速率在细节常数$γ_ {\ rm flip} \ proptoαm_{e}^{2}/t $中是一阶，因此比天真估计的数十年大。这种违反直觉结果是通过在高温下通过环境效应在高温正常的红外差异而产生的。轴向电荷的衰减在瘦肉发生和宇宙磁化的问题中起着重要作用。
We investigate collisional decay of the axial charge in an electron-photon plasma at temperatures 10 MeV - 100 GeV. We demonstrate that the decay rate of the axial charge is first order in the fine-structure constant $Γ_{\rm flip}\propto αm_{e}^{2}/T$ and thus orders of magnitude greater than the naive estimate which has been in use for decades. This counterintuitive result arises through infrared divergences regularized at high temperature by environmental effects. The decay of axial charge plays an important role in the problems of leptogenesis and cosmic magnetogenesis.
