Leptogenesis in A₄ flavor symmetry model by renormalization group evolution

We study how leptogenesis can be implemented in the seesaw models with A₄ flavor symmetry, which lead to the tri-bimaximal neutrino mixing matrix. By considering renormalization group evolution from a high energy scale of flavor symmetry breaking (the GUT scale is assumed) to the low energy scale of relevant phenomena, the off-diagonal terms in a combination of Dirac Yukawa - coupling matrix can be generated. As a result, the flavored leptogenesis is successfully realized. We also investigate how the effective light neutrino mass ee> associated with neutrinoless double beta decay can be predicted by imposing the experimental data on the low energy observables. We find a link between the leptogenesis and the neutrinoless double beta decay characterized by ee> through a high energy CP phase φ, which is correlated with the low energy Majorana CP phase. It is shown that the predictions of ee> for some fixed parameters of the high energy physics can be constrained by the current observation of baryon asymmetry. (author)