Nonzero θ13, CP-violation and neutrinoless double beta decay for neutrino mixing in the A4×Z2×Z3 flavor symmetry model

Abstract

In this paper, we study the modification of the Altarelli–Feruglio [Formula: see text] flavor symmetry model by adding three singlet flavons [Formula: see text], [Formula: see text] and [Formula: see text] and the model is augmented with extra [Formula: see text] symmetry to prevent the unwanted terms in our study. The addition of these three flavons leads to two higher order corrections in the form of two perturbation parameters [Formula: see text] and [Formula: see text]. These corrections yield the deviation from exact tri-bimaximal (TBM) neutrino mixing pattern by producing a nonzero [Formula: see text] and other neutrino oscillation parameters which are consistent with the latest experimental data. In both the corrections, the neutrino masses are generated via Weinberg operator. The analysis of the perturbation parameters [Formula: see text] and [Formula: see text], shows that normal hierarchy (NH) and inverted hierarchy (IH) for [Formula: see text] do not change much. However, as the values of [Formula: see text] increase, [Formula: see text] occupies the lower octant for NH case. We further investigate the neutrinoless double beta decay parameter [Formula: see text] using the parameter space of the model for both normal and inverted hierarchies of neutrino masses.