arXiv:hep-ph/0103229·v2·High Energy Physics — Phenomenology
Leptogenesis in Smooth Hybrid Inflation
R. Jeannerot (SISSA, Trieste)🇮🇹 · S. Khalil (Sussex U. & Ain Shams U., Cairo)🇬🇧 · G. Lazarides (Aristotle U. of Thessaloniki)🇬🇷
Abstract
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.
Comments: 12 pages including 3 figures, version to appear in Phys. Lett. B