Unified origin of baryons and dark matter
High Energy Physics - Phenomenology
2008-11-26 v2
Abstract
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.
Cite
@article{arxiv.0807.4313,
title = {Unified origin of baryons and dark matter},
author = {Ryuichiro Kitano and Hitoshi Murayama and Michael Ratz},
journal= {arXiv preprint arXiv:0807.4313},
year = {2008}
}
Comments
12 pages, one figure; v2: matches version published in PLB