## Lepton masses and mixings in a $A_{4}$ multi-Higgs model with radiative seesaw    [PDF]

A. E. Carcamo Hernandez, Ivo de Medeiros Varzielas, S. G. Kovalenko, H. Päs, Ivan Schmidt
We propose a renormalizable multi-Higgs model with $A_{4}\otimes Z_{2}\otimes Z^{\prime}_{2}$ symmetry, accounting for the experimental deviation from the tribimaximal mixing pattern of the neutrino mixing matrix. In this framework we study the charged lepton and neutrino masses and mixing. The light neutrino masses are generated via a radiative seesaw mechanism, which involves a single heavy Majorana neutrino and neutral scalars running in the loops. The obtained neutrino mixing and mass squared splittings are in good agreement with the neutrino oscillation experimental data for both normal and inverted hierarchy. The model also features a suppression of CP violation in neutrino oscillations, a low scale for the heavy Majorana neutrino (few TeV) and, due to the unbroken $Z_2$ symmetry, a natural dark matter candidate.
View original: http://arxiv.org/abs/1307.6499