Catalyzed Baryogenesis
Abstract
A novel mechanism, "catalyzed baryogenesis," is proposed to explain the observed baryon asymmetry in our universe. In this mechanism, the motion of a ball-like catalyst provides the necessary out-of-equilibrium condition, its outer wall has CP-violating interactions with the Standard Model particles, and its interior has baryon number violating interactions. We use the electroweak-symmetric ball model as an example of such a catalyst. In this model, electroweak sphalerons inside the ball are active and convert baryons into leptons. The observed baryon number asymmetry can be produced for a light ball mass and a large ball radius. Due to direct detection constraints on relic balls, we consider a scenario in which the balls evaporate, leading to dark radiation at testable levels.
Keywords
Cite
@article{arxiv.2106.12589,
title = {Catalyzed Baryogenesis},
author = {Yang Bai and Joshua Berger and Mrunal Korwar and Nicholas Orlofsky},
journal= {arXiv preprint arXiv:2106.12589},
year = {2021}
}
Comments
15 pages, 3 figures