Unified origin of baryons and dark matter
Kitano, Ryuichiro and Murayama, Hitoshi and Ratz, Michael
Keywords
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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.
