Heavy charged Higgs boson decaying into top quark in the MSSM
arXiv:hep-ph/9711472 · doi:10.1016/S0370-2693(98)00255-X
Abstract
Observing a heavy charged Higgs boson produced in the near future at the Tevatron or at the LHC would be instant evidence of physics beyond the Standard Model. Whether such a Higgs boson would be supersymmetric or not it could only be decided after accurate prediction of its properties. Here we compute the decay width of the dominant decay of such a boson, namely H^+ -> t \bar{b}, including the leading electroweak corrections originating from large Yukawa couplings within the MSSM. These electroweak effects turn out to be of comparable size to the O(alpha_s) QCD corrections in relevant portions of the MSSM parameter space. Our analysis incorporates the stringent low-energy constraints imposed by radiative B-meson decays.
10 pages, LaTeX, 5 figs included as a separate file, full postscript version available at ftp://ftp.ifae.es/preprint/ft/uabft433.ps
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