Abstract
In models with large extra dimensions and TeV scale quantum gravity, small (Dirac) neutrino masses can be obtained naturally if the right-handed neutrino propagates in the extra dimensions. In this scenario, with 2 Higgs doublets, we show that the decay of charged Higgs into left-handed charged lepton (say τ) and right-handed neutrino can be significantly enhanced, with O(1) branching ratio, due to the large number of Kaluza–Klein states of the right-handed neutrino. Since τ's from the standard decay of charged Higgs are right-handed, the above novel charged Higgs decay can provide a distinctive signature of these models at hadron/lepton colliders. Similarly, top quark decays to bμ + ν, bτ + ν through virtual charged Higgs can be enhanced.
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