Albert del Moral Villanova (València):
Predicting
Neutrinoless Double Beta Decay in the A_{4}
Family Symmetry Model
Abstract:
We give predictions for the neutrinoless double beta decay rate in a
simple variant of the A_{4} family symmetry model. We show that there is a
lower bound for the neutrinoless double beta decay amplitude even in the
case of normal hierarchical neutrino masses, corresponding to an
effective mass parameter larger than or equal to 0.17 the atmospheric
neutrino mass scale. This result holds both for the CP conserving and CP
violating cases. In the latter case we show explicitly that the lower
bound on the effective mass parameter is sensitive to the value of the
Majorana phase. We conclude therefore that in our scheme, neutrinoless
double beta decay may be accessible to the next generation of high
sensitivity experiments.
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