Unified origin of baryons and dark matter

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

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High Energy Physics - Phenomenology

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http://salesiana.dossiersoluciones.com/handle/123456789/201777

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0807.4313
 http://arxiv.org/abs/0807.4313
 Phys.Lett.B669:145-149,2008
 doi:10.1016/j.physletb.2008.09.049

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arXiv