Resonant Leptogenesis in the Minimal B−L Extended Standard Model at TeV

 dc.contributor.author Okada, Nobuchika dc.date.accessioned 2019-05-16T18:18:02Z dc.date.available 2019-05-16T18:18:02Z dc.date.issued 2011-05-19 en_US dc.identifier.uri http://ir.ua.edu/handle/123456789/5558 dc.description.abstract We investigate the resonant leptogenesis scenario in the minimal B−L extended standard model with the B−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. en_US dc.format.mimetype application/pdf en_US dc.language English en_US dc.subject Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.) en_US dc.subject Neutrino mass and mixing en_US dc.subject Other gauge bosons en_US dc.title Resonant Leptogenesis in the Minimal B−L Extended Standard Model at TeV en_US dc.type text en_US
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