Highly predictive and testable $A_{4}$ flavor model within type-I and II seesaw framework and associated phenomenology

Abstract

We investigate neutrino mass model based on $A_4$ discrete flavor symmetry in type-I+II seesaw framework. The model has imperative predictions for neutrino masses, mixing and $CP$ violation testable in the current and upcoming neutrino oscillation experiments. The important predictions of the model are: normal hierarchy for neutrino masses, a higher octant for atmospheric angle ($\theta_{23}>45^{o}$) and near-maximal Dirac-type $CP$ phase ($\delta\approx\pi/2$ or $3\pi/2$) at $3\sigma$ C. L.. These predictions are in consonance with the latest global-fit and results from Super-Kamiokande(SK), NO$\nu$A and T2K. Also, one of the important feature of the model is the existence of a lower bound on effective Majorana mass, $|M_{ee}|\geq 0.047$eV(at 3$\sigma$) which corresponds to the lower part of the degenerate spectrum and is within the sensitivity reach of the neutrinoless double beta decay(0$\nu\beta\beta$) experiments.