# Protecting the Baryon Asymmetry with Thermal Masses

Source: [Protecting the Baryon Asymmetry with Thermal Masses](<https://www.sota2.com/research/paper/68fa23ca2c2a37601939c3ab>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T07:43:55.090Z

Authors: S. Davidson, K. Kainulainen, K.A. Olive

Published: 1994-05-03T17:44:44.000Z

## Abstract

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.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/hep-ph/9405215>)

[PDF](<https://arxiv.org/pdf/hep-ph/9405215.pdf>)