Charged Lepton Flavour Violating Radiative Decays l(i) -> l(j) + gamma in See-Saw Models with A(4) Symmetry

The charged lepton flavour violating (LFV) radiative decays, μ → e + γ, τ → μ + γ and τ → e + γ are investigated in a class of supersymmetric A4 models with three heavy right-handed (RH) Majorana neutrinos, in which the lepton (neutrino) mixing is predicted to leading order (LO) to be tri-bimaximal. The light neutrino masses are generated via the type I see-saw mechanism. The analysis is done within the framework of the minimal supergravity (mSUGRA) scenario, which provides flavour universal boundary conditions at the scale of grand unification MX ≈ 2 × 10^{16} GeV. Detailed predictions for the rates of the three LFV decays are obtained in two explicit realisations of the A4 models due to Altarelli and Feruglio and Altarelli and Meloni, respectively.