Leptogenesis in Smooth Hybrid Inflation

Details Leptogenesis in Smooth Hybrid Inflation Leptogenesis in Smooth Hybrid Inflation

2001-03-21

arxiv.org/abs/hep-ph/0103229v2

Phys.Lett.B506:344-350,2001

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages including 3 figures, version to appear in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(01)00429-4

We present a concrete supersymmetric grand unified model based on the Pati-Salam gauge group SU(4)_c x SU(2)_L x SU(2)_R and leading naturally to smooth hybrid inflation, which avoids the cosmological disaster encountered in the standard hybrid inflationary scenario from the overproduction of monopoles at the end of inflation. Successful `reheating' which satisfies the gravitino constraint takes place after the termination of inflation. Also, adequate baryogenesis via a primordial leptogenesis occurs consistently with the solar and atmospheric neutrino oscillation data as well as the SU(4)_c symmetry.

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