2010/11/30 by Satoshi Iso, Nobuchika Okada, Yuta Orikasa · 1 citation
Physics and Astronomy · #Algorithm #Computer science #Dark Matter and Cosmic Phenomena #Database #Leptogenesis #Nuclear physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.83.093011
25 pages, 15 figures, version to be published in Phys. Rev. D
arxiv created 2011/05/06 · openalex publication_date 2011/05/19 · arxiv updated 2013/05/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We investigate the resonant leptogenesis scenario in the minimal B\ensuremath-L extended standard model with the B\ensuremath-L symmetry breaking at the TeV scale. Through detailed analysis of the Boltzmann equations, we show how much the resultant baryon asymmetry via leptogenesis is enhanced or suppressed, depending on the model parameters, in particular, the neutrino Dirac-Yukawa couplings and the TeV scale Majorana masses of heavy degenerate neutrinos. In order to consider a realistic case, we impose a simple ansatz for the model parameters and analyze the neutrino oscillation parameters and the baryon asymmetry via leptogenesis as a function of only a single CP phase. We find that for a fixed CP phase all neutrino oscillation data and the observed baryon asymmetry of the present Universe can be simultaneously reproduced.