Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-06-12
Phys.Lett. B489 (2000) 367-376
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTeX, 14 pages, 2 ps figures. In the revised version, we have taken into account the SN1987a constraint on the size of the ex
Scientific paper
10.1016/S0370-2693(00)00941-2
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 {\em left-handed} charged lepton (say \tau) 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 \tau's from the standard decay of charged Higgs are {\em 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 b \mu^+ \nu, b \tau^+ \nu through virtual charged Higgs can be enhanced.
Agashe Kaustubh
Deshpande Nilendra G.
Wu Guo-Hong
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