2003/12/31 by T. Dent, Thomas Dent, G. Lazarides +2 · 3 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1103/physrevd.69.075012
published as Phys.Rev. D69 (2004) 075012 · 11 pages including 3 figures, uses Revtex, minor corrections, references added
arxiv created 2004/01/14 · openalex publication_date 2004/04/29 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present a scenario of nonthermal leptogenesis following supersymmetric hybrid inflation, in the case where inflaton decay to both heavy right-handed neutrino and SU(2)L triplet superfields is kinematically disallowed. Lepton asymmetry is generated through the decay of the inflaton into light particles by the interference of one-loop diagrams with right-handed neutrino and SU(2)L triplet exchange, respectively. We require superpotential couplings explicitly violating a U(1) R symmetry and R parity. However, the broken R parity need not have currently observable low-energy signatures. Also, the lightest sparticle can be stable. Some R-parity-violating slepton decays may, though, be detectable in future colliders. We take into account the constraints from neutrino masses and mixing and the preservation of the primordial lepton asymmetry.