2010/03/19 by Takeshi Fukuyama, Nobuchika Okada
Physics and Astronomy · #Asymmetry #Baryon #Baryon asymmetry #Cosmology and Gravitation Theories #Leptogenesis #Mass matrix #Mixing (physics) #Neutrino #Neutrino Physics Research #Particle physics theoretical and experimental studies #Universe #astro-ph.CO #hep-ph
paper · pdf · doi:10.1088/1475-7516/2010/09/024
published as JCAP 1009:024,2010 · 13 pages, 6 figures, typos corrected and new references added
arxiv created 2010/03/19 · openalex publication_date 2010/09/21 · arxiv updated 2015/03/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We discuss non-thermal leptogenesis in the scheme of 5D orbifold SO(10) GUT with the smooth hybrid inflation. With unambiguously determined Dirac Yukawa couplings and an assumption for the neutrino mixing matrix of the tri-bimaximal from, we analyze baryon asymmetry of the universe via non-thermal leptogenesis in two typical cases for the light neutrino mass spectrum, the normal and inverted hierarchical cases. The resultant baryon asymmetry is obtained as a function of the lightest mass eigenvalue of the light neutrinos, and we find that a suitable amount of baryon asymmetry of the universe can be produced in the normal hierarchical case, while in the inverted hierarchical case the baryon asymmetry is too small to be consistent with the observation.