A_4 symmetry and prediction of U_{e3} in a modified Altarelli-Feruglio model

Details A_4 symmetry and prediction of U_{e3} in a modified Altarelli-Feruglio model A_4 symmetry and prediction of U_{e3} in a modified Altarelli-Feruglio model

2006-03-08

arxiv.org/abs/hep-ph/0603059v2

Phys.Lett.B638:345-349,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 Pages, 1 figure, reference added, few changes in text

Scientific paper

10.1016/j.physletb.2006.05.051

We show that a modification of a recently proposed model by Altarelli and Feruglio with softly broken $A_4$ symmetry leads naturally to nonvanishing $U_{e3}$ with $\theta_{13}\simeq 2^o - 4^o$. The observed mass squared differences for solar and atmospheric neutrinos have been fitted without fine tuning among model parameters. The predicted solar neutrino mixing angle is brought down from the tri-bimaximal prediction to be in concordance with the latest global analysis including experimental data from KamLAND and SNO.

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