Leptogenesis in A4 flavor symmetry model

As a result, the flavored leptogenesis is successfully realized. We also investigate how the effective light neutrino mass |hmeei| associated with neutrinoless double beta decay can be predicted by imposing the experimental data on the low energy observables. We find a link between the leptogenesis and the neutrinoless double beta decay characterized by |hmeei| through a high energy CP phase φ, which is correlated with the low energy Majorana CP phases.

11p thuyliebe 09-10-2018 21 0   Download

We study the seesaw realization of a A4 model with two Higgs singlets. In this model, the mixing angle θ13 and leptogenesis are zero if the components of right handed neutrino mass matrix resulting from the two Higgs singlets are exact degenerate. We then study the minimal breaking of the model by a tiny shift between aforementioned components. This minimal breaking results in deviations of lepton mixing angles from their tri-bimaximal mixing values in which the current experimental value of θ13 can be achieved.

11p thuyliebe 09-10-2018 20 1   Download