Efficient electroweak baryogenesis by black holes

Understand

A novel cosmological scenario, capable to generate the observed baryon number at the electroweak scale for very small CP violating angles, is presented.

• The proposed mechanism can be applied in conventional FRW cosmology, but becomes extremely efficient due to accretion in the context of early cosmic expansion with high energy modifications.
• Assuming that our universe is a Randall-Sundrum brane, baryon asymmetry can easily be produced by Hawking radiation of very small primordial black holes.
• The Hawking radiation reheats a spherical region around every black hole to a high temperature and the electroweak symmetry is restored there.