An A5 inverse seesaw model with perturbed golden ratio mixing

Abstract

We propose a theory based on the A5 discrete group which successfully accounts for lepton masses and mixings. In the proposed model, the neutrino masses arise from an inverse seesaw mechanism. The leptonic mixing consists in a perturbed golden ratio mixing pattern with a strong correlation arising between the leptonic mixing observables, which can be expressed as θ13 predicting the other mixing angles and the Dirac CP phase.