Fermion and Anti-Fermion Effective Masses in High Temperature Gauge Theories in $CP$-Asymmetric Background

Abstract

We calculate the splitting between fermion and anti-fermion effective masses in high temperature gauge theories in the presence of a non-vanishing chemical potential due to the $CP$-asymmetric fermionic background. In particular we consider the case of left-handed leptons in the $SU(2)\otimes U(1)$ theory when the temperature is above $250$ GeV and the gauge symmetry is restored.

13 pages, TIPAC-930010

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