Probing lepton flavor violation with nonzero $U_{e3}$ and leptogenesis through $A_4$ symmetry breaking

Abstract

We study how lepton flavor violation (LFV) is related to the reactor angle $θ_{13}$, LHC/dark matter (DM) signal with a successful leptogenesis in a radiative seesaw model through $A_4$ flavor symmetry breaking, in the light of the deviation of tri-bimaximal mixing (TBM) angles and the recent precision oscillation data. To do this, we consider the normal mass spectrum of light neutrino giving a successful leptogenesis at electroweak (EW) scale or more with a relatively large $\sinθ_{13}\simeq{\cal O}(0.1)$, where a successful leptogenesis requires LHC/DM signal $m_{-}\lesssim$ a few keV in our scenario, and we show that the measurement of $τ\rightarrowμγ$ is strongly dependent on $m_{-}$ and the leptogenesis scale. Especially, we show that $μ\rightarrow eγ$ and $μ-e$ conversion are proportional to the value of $θ_{13}$, and the measurements of both $μ\rightarrow eγ$ (and/or $μ-e$ conversion) and $θ_{13}$ can give a prediction of $τ\rightarrowμγ$ with a successful leptogenesis.