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Evolution of the primordial axial charge across cosmic times | | A. Boyarsky
; V. Cheianov
; O. Ruchayskiy
; O. Sobol
; | | Date: |
27 Jul 2020 | | Abstract: | 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 $Gamma_{
m
flip}propto alpha m_{e}^{2}/T$ and thus orders of magnitude greater than the
naive estimate which has been in use for decades. This counter-intuitive 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. | | Source: | arXiv, 2007.13691 | | Services: | Forum | Review | PDF | Favorites | |
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