Two higgs singlets A4 flavor symmetry with minimal breaking

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