Phenomenology of Higgs bosons in the Zee model - art. no. 053007

To generate small neutrino masses radiatively, the Zee model introduces two Higgs doublets and one weak-singlet charged Higgs boson to its Higgs secto r. From analyzing the renormalization group equations, we determine the pos sible range of the lightest CP-even Higgs boson (h) mass and the Higgs boso n 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 guarantee d. Using the results obtained from the above analysis, we find that the sin glet charged Higgs boson can significantly modify the partial decay width o f h --> gamma gamma via radiative corrections, and its collider phenomenolo gy can also be drastically different from that of the charged Higgs bosons in the usual two-Higgs-doublet models.