Dark Matter and Baryon Asymmetry of the Universe in Large-Cutoff Supergravity

Details Dark Matter and Baryon Asymmetry of the Universe in Large-Cutoff Supergravity Dark Matter and Baryon Asymmetry of the Universe in Large-Cutoff Supergravity

2005-02-08

arxiv.org/abs/hep-ph/0502074v1

Phys.Lett. B620 (2005) 9-16

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 2 figures

Scientific paper

10.1016/j.physletb.2005.05.062

We propose a consistent scenario of the evolution of the universe based on the large cutoff supergravity (LCSUGRA) hypothesis of supersymmetry breaking, where the gravitino and sfermion become as heavy a $\sim O(1-10 {\rm TeV})$. With such a heavy gravitino, baryon asymmetry of the universe can be generated by the non-thermal leptogenesis via an inflaton decay without conflicting the serious gravitino problem. We also see that, in the LCSUGRA scenario, relic density of the lightest superparticle becomes consistent with the WMAP value of the dark matter density in the parameter region required for the successful non-thermal leptogenesis.

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