2001/09/18 by Masaaki Fujii, K. Hamaguchi, Koichi Hamaguchi +1 · 1 citation
Physics and Astronomy · #Asymmetry #Baryogenesis #Baryon #Baryon asymmetry #Baryon number #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Electron #Gravitino #Leptogenesis #Lepton #Neutrino #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Supergravity #Supersymmetry #hep-ph
paper · pdf · doi:10.1103/physrevd.65.043511
published as Phys.Rev. D65 (2002) 043511 · 27 pages, LaTeX, 5 figures
arxiv created 2001/09/18 · openalex publication_date 2002/01/28 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study the supersymmetric leptogenesis via the LHu flat direction with a gauged U(1)_B\ensuremath-L symmetry. We find that the resultant baryon asymmetry is enhanced compared with the case without a gauged U(1)_B\ensuremath-L symmetry. The baryon asymmetry is proportional to the reheating temperature of inflation, but it is independent of the gravitino mass. If high reheating temperatures of inflation TR\ensuremath∼1010GeV are available, the mass of the lightest neutrino, m_\ensuremathν1\ensuremath∼10^\ensuremath-4eV, is small enough to explain the baryon asymmetry in the present universe. Furthermore, the gravitino mass independence of the produced baryon asymmetry allows us to explain the present baryon asymmetry even in low energy supersymmetry breaking scenarios such as gauge-mediation models. Our leptogenesis scenario is also very special in the sense that it is completely free from the serious Q-ball formation problem.