International Journal of Modern Physics A 30, 1550102 (2015)

ISSN: 0217-751X, SCI

Neutrino mixing with nonzero θ 13 and CP violation in the 3-3-1 model based on S 4 flavor symmetry

Vo Van Vien, Hoang Ngoc Long, Dinh Phan Khoi

The 3-3-1 model proposed in 2011 based on discrete symmetry S4 responsible for the neutrino and quark masses is updated, in which the nonzero 13 is focused. Neutrino masses and mixings are consistent with the most recent data on neutrino oscillations without perturbation. The new feature is adding a new SU(3)L anti-sextet lying in doublet under S4 which can result the nonzero 13 without perturbation, and consequently, the number of Higgs multiplets required is less than those of other models based on non-Abelian discrete symmetries and the 3-3-1 models. The exact tribimaximal form obtained with the breaking S4 → Z3 in charged lepton sector and S4 → K in neutrino sector. If both breakings S4 → K and K → Z2 are taken place in neutrino sector, the realistic neutrino spectrum is obtained without perturbation. The upper bound on neutrino mass and the effective mass governing neutrinoless double beta decay at the tree level are presented. The model predicts the Dirac CP violation phase  = 292.45◦ in the normal spectrum (with 23 6=  4 ) and  = 303.14◦ in the inverted spectrum.

DOI: DOI: 10.1142/S0217751X1550102X

Tải xuống: