Catalyzed baryogenesis

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.

Automated summary

This paper proposes a novel mechanism, catalyzed baryogenesis, to explain the observed baryon asymmetry in our universe by utilizing a ball-like catalyst's motion and its interactions with Standard Model particles. The use of the electroweak-symmetric ball model is demonstrated as an example, where electroweak sphalerons inside the ball convert baryons into leptons. The model also considers the constraints on relic balls and suggests a scenario where the balls evaporate, leading to testable levels of dark radiation.