Multiscalar B − L extension with A4 symmetry for fermion mass and mixing with co-bimaximal scheme

Abstract

We construct a multiscalar and nonrenormalizable B−L extension of the standard model with A4 group which successfully explains the recent observed neutrino oscillation pattern. The tiny neutrino masses and their orderings are reproduced via the type-I seesaw mechanism. The model predicts co-bimaximal neutrino mixing, i.e., θ23=π4, δCP=−π2 while θ13=8.57∘ for normal hierarchy and θ13=8.60∘ for inverted hierarchy. The effective neutrino masses are predicted to be 〈mee〉=10.0meV for NH and 〈mee〉=48.40meV for IH being in good agreement with the most recent experimental data. The obtained results are also in agreement with the recent experimental data on the SM quark masses, mixing angles and CP violation in the quark sector.

Keywords

• Quark and lepton masses and mixing
• Extensions of electroweak Higgs sector
• Non-standard-model neutrinos
• Right-handed neutrinos
• Discrete symmetry