2005/03/31 by Takeshi Fukuyama, T. Kikuchi, Tatsuru Kikuchi +1
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:10.1088/1475-7516/2005/06/005
published as JCAP 0506 (2005) 005 · 9 pages, 2 figures; the version to appear in JCAP
arxiv created 2005/06/04 · openalex publication_date 2005/06/14 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
The gravitino problem gives a severe constraint on the thermal leptogenesis scenario. This problem leads us to consider some alternatives to it if we try to keep the gravitino mass around the weak scale m 3/2 ∼100 GeV. We consider, in this paper, the non-thermal leptogenesis scenario in the framework of a minimal supersymmetric SO (10) model. Even if we start with the same minimal SO (10) model, we have different predictions for low-energy phenomenologies dependent on the types of see-saw mechanism. This is the case for leptogenesis: it is shown that the type-I see-saw model gives a consistent scenario for the non-thermal leptogenesis but the type-II one does not. The predicted inflaton mass needed to produce the observed baryon asymmetry of the universe is found to be M I ∼5 × 10 11 GeV for the reheating temperature T R = 10 6 GeV.