Scalaron the mighty: producing dark matter and baryon asymmetry at reheating

Details Scalaron the mighty: producing dark matter and baryon asymmetry at reheating Scalaron the mighty: producing dark matter and baryon asymmetry at reheating

2010-09-13

arxiv.org/abs/1009.2448v3

Phys.Lett.B700:157-162,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages; v2: minor corrections; v3: 14 pages, journal version

Scientific paper

10.1016/j.physletb.2011.04.067

In R^2-inflation scalaron slow roll is responsible for the inflationary stage, while its oscillations reheat the Universe. We find that the same scalaron decays induced by gravity can also provide the dark matter production and leptogenesis. With R^2-term and three Majorana fermions added to the Standard Model, we arrive at the phenomenologically complete theory capable of simultaneously explaining neutrino oscillations, inflation, reheating, dark matter and baryon asymmetry of the Universe. Besides the seesaw mechanism in neutrino sector, we use only gravity, which solves all the problems by exploiting scalaron.

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