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

In R2-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 R2-term and three Majorana fermions added to the Stand...

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Veröffentlicht in:	Physics letters. B 2011-06, Vol.700 (3-4), p.157-162
Hauptverfasser:	Gorbunov, D.S., Panin, A.G.
Format:	Artikel
Sprache:	eng
Schlagworte:	Asymmetry Dark matter Gravitation Heating Inflation Leptogenesis Neutrinos Oscillations Reheating Scalaron Universe
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description	In R2-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 R2-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.
doi_str_mv	10.1016/j.physletb.2011.04.067
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subjects	Asymmetry Dark matter Gravitation Heating Inflation Leptogenesis Neutrinos Oscillations Reheating Scalaron Universe
title	Scalaron the mighty: Producing dark matter and baryon asymmetry at reheating
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