Probing neutrino and Higgs sectors in SU(2)₁ × SU(2)₂ × U(1)ᵧ model with lepton-flavor non-universality

Abstract

The neutrino and Higgs sectors in the SU(2)₁ × SU(2)₂ × U(1)ᵧ model with lepton-flavor non-universality are discussed. We show that active neutrinos can get Majorana masses from radiative corrections, after adding only new singly charged Higgs bosons. The mechanism for generation ofneutrino masses is the same as in the Zee models. This also gives a hint to solving the dark matter problem based on similar ways discussed recently in many radiative neutrino mass models with dark matter. Except the active neutrinos, the appearance of singly charged Higgs bosons and dark matter does not affect significantly the physical spectrum of a ll particles in the original model. We indicate this point by investigating the Higgs sector in bot h cases before and after singly charged scalars are added into it. Many interesting properties of physical Higgs bosons, which were not shown previously, are explored. In particular, the mass matrices of charged and CP-odd Higgs fields are proportional to the coefficient of triple Higgs coupling μ. The mass eigenstates and eigenvalues in the CP-even Higgs sector are also presented. All couplings of the SM-like Higgs boson to normal fermions and gauge bosons are different from the SM predictions by a factor ch, which must satisfy the recent global fit of experimental data, namely 0.995.