Asymmetric Dark Matter via Spontaneous Co-Genesis
High Energy Physics - Phenomenology
2015-05-28 v2 Cosmology and Nongalactic Astrophysics
Abstract
We investigate, in the context of asymmetric dark matter (DM), a new mechanism of spontaneous co-genesis of linked DM and baryon asymmetries, explaining the observed relation between the baryon and DM densities, Omega_DM/Omega_B ~ 5. The co-genesis mechanism requires a light scalar field, phi, with mass below 5 eV which couples derivatively to DM, much like a `dark axion'. The field phi can itself provide a final state into which the residual symmetric DM component can annihilate away.
Keywords
Cite
@article{arxiv.1106.4319,
title = {Asymmetric Dark Matter via Spontaneous Co-Genesis},
author = {John March-Russell and Matthew McCullough},
journal= {arXiv preprint arXiv:1106.4319},
year = {2015}
}
Comments
15 pages incl refs, 4 figures. v2 references updated and section on DM annihilation extended