Unified origin of baryons and dark matter
- Author(s): Kitano, R
- Murayama, H
- Ratz, M
- et al.
Published Web Locationhttps://doi.org/10.1016/j.physletb.2008.09.049
We investigate the possibility that both the baryon asymmetry of the universe and the observed cold dark matter density are generated by decays of a heavy scalar field which dominates the universe before nucleosynthesis. Since baryons and cold dark matter have common origin, this mechanism yields a natural explanation of the similarity of the corresponding energy densities. The cosmological moduli and gravitino problems are avoided. © 2008 Elsevier B.V. All rights reserved.