Protecting the Baryon Asymmetry with Thermal Masses

Details Protecting the Baryon Asymmetry with Thermal Masses Protecting the Baryon Asymmetry with Thermal Masses

1994-05-03

arxiv.org/abs/hep-ph/9405215v1

Phys.Lett.B335:339-344,1994

Physics

High Energy Physics

High Energy Physics - Phenomenology

11pp., plain tex, UMN-TH-1248/94, CfPA-TH-94-19

Scientific paper

10.1016/0370-2693(94)90361-1

We consider the evolution of baryon number $B$ in the early universe under the influence of rapid sphaleron interactions and show that $B$ will remain nonzero at all times even in the case of $B-L = 0$. This result arises due to thermal Yukawa interactions that cause nonidentical dispersion relations (thermal masses) for different lepton families. We point out the relevance of our result to the Affleck-Dine type baryogenesis.

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