Neutrino mass models with and without θ 13 in predicting leptogenesis

Abstract

We estimate the baryon asymmetry, mass of inflaton and reheating temperature in different neutrino mass models with and without θ13 by considering the three diagonal form of Dirac neutrino mass matrices. The predictions of any models with θ13 are consistent in all the three stages of leptogenesis calculations and the results are also better than the predictions of the models without θ 13 and are consistent in a piecemeal manner with the observational data. Further, we observe that for neutrino mass models with vanishing θ 13, contribution of muon predominates over electron and tau contributions and full flavour regime M1 ≤ 109 GeV is more favourable, whereas for neutrino mass models with non-vanishing θ 13, contribution of tau predominates over electron and muon contributions and two flavours regime (109 ≤ M1 ≤ 1012) GeV is also possible besides three flavours regime. The predicted inflaton mass required to produce the observed baryon asymmetry and the corresponding reheating temperatures apply to recent discovery of Higgs boson of mass ~125 GeV.