The minimal supersymmetric leptogenesis

1999/08/16 by Takeo Moroi, Hitoshi Murayama · 4 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies #astro-ph #hep-ph

paper · pdf · doi:10.1088/1126-6708/2000/07/009

published as JHEP 0007:009,2000 · 14 pages, references added, typos corrected

arxiv created 1999/08/16 · openalex publication_date 2000/07/06 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

We reanalyze the supersymmetric leptogenesis model by one of the authors (HM) and Yanagida based on L = H_u flat direction in detail. We point out that the appropriate amount of baryon asymmetry can be generated in this model with the neutrino mass matrix consistent with the atmospheric neutrino oscillation and solutions to the solar neutrino problem, preferably the small angle MSW solution. The reheating temperature can be low enough to avoid the cosmological gravitino problem. This model is the minimal one because it does not rely on any new physics beyond supersymmetry and Majorana neutrino masses.

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