Chiral magnetic effect amplified baryogenesis at first-order phase transitions

TL;DR

This paper demonstrates that the chiral magnetic effect, in the presence of primordial magnetic fields, can greatly enhance baryogenesis during the electroweak phase transition, potentially explaining the universe's matter-antimatter asymmetry.

Contribution

It reveals how the chiral magnetic effect amplifies baryon asymmetry during first-order phase transitions, surpassing previous limitations from electron dipole moment constraints.

Findings

Chiral magnetic effect significantly amplifies baryon asymmetry.

Primordial magnetic fields enhance CP violation effects.

Potential to explain universe's matter-antimatter asymmetry.

Abstract

In this study, we show that, in the background of the primordial magnetic field, the chiral magnetic effect effect can significantly amplify the chiral chemical potential sourced by the CP violation near the bubble walls during the first-order electroweak phase transition. This effect can lift the generated baryon asymmetry by several orders, and make it possible to explain the baryon asymmetry of the Universe with a CPV in the fermion sector far beyond the limitation of the electron dipole moment.