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Abstract. We study how leptogenesis can be implemented in the seesaw models withA4 flavor symmetry, which lead to the tri-bimaximal neutrino mixing matrix. By considering renormalzation 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 |〈mee〉| 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 |〈mee〉| through a high energy CP phase φ, which is correlated with the low energy Majorana CP phases. It is shown that the predictions of |〈mee〉| for some fixed parameters of the high energy physics can be constrained by the current observation of baryon asymmetry.

Leptogenesis in \(A_4\) Flavor Symmetry Model by Renormalization Group Evolution