Unified origin of baryons and dark matter

Details Unified origin of baryons and dark matter Unified origin of baryons and dark matter

2008-07-27

arxiv.org/abs/0807.4313v2

Phys.Lett.B669:145-149,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, one figure; v2: matches version published in PLB

Scientific paper

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.

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