Baryon Asymmetry, Dark Matter and Local Baryon Number

Understand

We propose a new mechanism to understand the relation between the baryon and dark matter asymmetries in the universe in theories where the baryon number is a local symmetry.

• In these scenarios the B-L asymmetry generated through a mechanism such as leptogenesis is transferred to the dark matter and baryonic sectors through sphalerons processes which conserve total baryon number.
• We show that it is possible to have a consistent relation between the dark matter relic density and the baryon asymmetry in the universe even if the baryon number is broken at the low scale through the Higgs mechanism.
• We also discuss the case where one uses the Stueckelberg mechanism to understand the conservation of baryon number in nature.