Phenomenology of Higgs bosons in the Zee model

Abstract

To generate small neutrino masses radiatively, the Zee model introduces two Higgs doublets and one weak-singlet charged Higgs boson to its Higgs sector. From analyzing the renormalization group equations, we determine the possible range of the lightest CP-even Higgs boson (h) mass and the Higgs boson self-couplings as a function of the cutoff scale beyond which either some of the coupling constants are strong enough to invalidate the perturbative analysis or the stability of the electroweak vacuum is no longer guaranteed. Using the results obtained from the above analysis, we find that the singlet charged Higgs boson can significantly modify the partial decay width of h --> gamma gamma via radiative corrections, and its collider phenomenology can also be drastically different from that of the charged Higgs bosons in the usual two-Higgs-doublet models.