CP violations in a predictive A4 symmetry model

We will investigate numerically a seesaw model with A 4 flavor symmetry to find allowed regions satisfying the current experimental neutrino oscillation data, then use them to predict physical consequences. Namely, the lightest active neutrino mass is of the order of O(10(-2)) eV. The effective neutrino mass vertical bar < m >vertical bar associated with neutrinoless double beta decay is in the range [0.002 eV, 0.038 eV] and [0.048 eV, 0.058 eV], corresponding to the normal and the inverted hierarchy schemes, respectively. Other relations among relevant physical quantities are shown, so that they can be determined if some of them are confirmed experimentally. The recent data of the baryon asymmetry of the Universe (eta(B)) can be explained via leptogenesis caused by the effect of the renormalization group evolution on the Dirac Yukawa couplings, provided the righthanded neutrino mass scale M-0 ranges from O(10(8)) GeV to O(10(12)) GeV for tan beta = 3. This allowed M-0 range is different from the scale of O(10(13)) GeV for other effects that also generate a consistent eta(B) from leptogenesis. The branching ratio of the decay mu -> e gamma may reach future experimental sensitivity for very light values of M-0. Hence, it will be inconsistent with the M-0 range predicted from the eta(B) data whenever this decay is detected experimentally.