Non-zero θ < inf > 13 < /inf > and leptonic CP phase with A < inf > 4 < /inf > symmetry

Abstract

We consider a model based on A4 symmetry to explain the phenomenon of neutrino mixing. The spontaneous symmetry breaking of A4 symmetry leads to a co-bimaximal mixing matrix at leading order. We consider the effect of higher order corrections in neutrino sector and find that the mixing angles thus obtained, come well within the 3 σ ranges of their experimental values. We study the implications of this formalism on the other phenomenological observables, such as CP violating phase, Jarlskog invariant and the effective Majorana mass | Mee|. We also obtain the branching ratio of the lepton flavour violating decay μ→ eγ in the context of this model and find that it can be less than its present experimental upper bound.