Leptonic Charged Higgs Decays in the Zee Model

Abstract

We consider the version of the Zee model where both Higgs doublets couple to leptons. Within this framework we study charged Higgs decays. We focus on a model with minimal number of parameters consistent with experimental neutrino data. Using constraints from neutrino physics we (i) discuss the reconstruction of the parameter space of the model using the leptonic decay patterns of both of the two charged Higgses, $h_{1,2}^{+}\to {\ell }_j^{+}{\nu }_i$, and the decay of the heavier charged Higgs, $h_2^{+}\to h_1^{+}{h}^0$; (ii) show that the decay rate $\Gamma (h_1^{+}\to {\mu }^{+}{\nu }_i)$ in general is enhanced in comparision to the standard two Higgs doublet model while in some regions of parameter space $\Gamma (h_1^{+}\to {\mu }^{+}{\nu }_i)$ even dominates over $\Gamma (h_1^{+}\to {\tau }^{+}{\nu }_i)$.

25 pages, 9 figures

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