Generalized Friedberg-Lee model for neutrino masses and leptonic CP violation from mu-tau symmetry breaking

Details Generalized Friedberg-Lee model for neutrino masses and leptonic CP violation from mu-tau symmetry breaking Generalized Friedberg-Lee model for neutrino masses and leptonic CP violation from mu-tau symmetry breaking

2007-12-17

arxiv.org/abs/0712.2611v1

Int.J.Mod.Phys.A23:3384-3387,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages. Talk given by He Zhang at the 4th International Conference on Flavor Physics, 24-28 September 2007, Beijing (to appea

Scientific paper

10.1142/S0217751X0804216X

Assuming the Majorana nature of massive neutrinos, we generalize the Friedberg-Lee neutrino mass model to include CP violation in the neutrino mass matrix M_\nu. The most general case with all the free parameters of M_\nu being complex is discussed. We show that a favorable neutrino mixing pattern (with \theta_12 \approx 35.3^\circ, \theta_23=45^\circ, \theta_13 \neq 0^\circ and \delta=90^\circ) can naturally be derived from M_\nu, if it has an approximate or softly-broken \mu-\tau symmetry. We also point out a different way to obtain the nearly tri-bimaximal neutrino mixing pattern with \delta=0^\circ and non-vanishing Majorana phases.

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