Evolution of the Primordial Axial Charge across Cosmic Times
Publikation: Bidrag til tidsskrift › Letter › Forskning › fagfællebedømt
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Evolution of the Primordial Axial Charge across Cosmic Times. / Boyarsky, A.; Cheianov, V. V.; Ruchayskiy, O.; Sobol, O.
I: Physical Review Letters, Bind 126, Nr. 2, 021801, 11.01.2021.Publikation: Bidrag til tidsskrift › Letter › Forskning › fagfællebedømt
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TY - JOUR
T1 - Evolution of the Primordial Axial Charge across Cosmic Times
AU - Boyarsky, A.
AU - Cheianov, V. V.
AU - Ruchayskiy, O.
AU - Sobol, O.
PY - 2021/1/11
Y1 - 2021/1/11
N2 - 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(flip) proportional to am(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.
AB - 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(flip) proportional to am(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.
KW - MAGNETIC-FIELDS
KW - QUASI-PARTICLES
KW - EQUILIBRIUM
U2 - 10.1103/PhysRevLett.126.021801
DO - 10.1103/PhysRevLett.126.021801
M3 - Letter
C2 - 33512189
VL - 126
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 2
M1 - 021801
ER -
ID: 260406984