2003/09/30 by V. N. Şenoğuz, V. N. Senoguz, Qaisar Shafi +1 · 5 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #astro-ph #hep-ph
paper · pdf · doi:10.1016/j.physletb.2003.12.020
published as Phys.Lett.B582:6-14,2004 · 1+18 pages, 8 figures. v.2: Abridged and revised, comments and references added, now 1+16 pages, 7 figures, to appear in PLB
arxiv created 2003/12/09 · openalex publication_date 2004/01/13 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
Leptogenesis scenarios in supersymmetric hybrid inflation models are considered. Sufficient lepton asymmetry leading to successfull baryogenesis can be obtained if the reheat temperature Tr≳106 GeV and the superpotential coupling parameter κ is in the range 10−6≲κ≲10−2. For this range of κ the scalar spectral index ns≃0.99±0.01. Constraints from neutrino mixing further restrict the range of κ that is allowed. We analyze in detail the case where the inflaton predominantly decays into the next-to-lightest right-handed Majorana neutrino taking into account especially the constraints from atmospheric neutrino oscillations.