QCD corrections to the decay $H^+ \to t \bar{b}$ in the Minimal Supersymmetric Standard Model

Details QCD corrections to the decay $H^+ \to t \bar{b}$ in the Minimal Supersymmetric Standard Model QCD corrections to the decay $H^+ \to t \bar{b}$ in the Minimal Supersymmetric Standard Model

1995-11-21

arxiv.org/abs/hep-ph/9511385v2

Phys.Lett.B378:167-174,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages latex, 5 uuencoded figures, LateX file of text and PS-files of the text and the figures are also available via anonym

Scientific paper

10.1016/0370-2693(96)00388-7

We present a complete calculation of the QCD corrections (of the order $\alpha_s$) to the width of the decay $H^+ \to t \bar{b}$ within the Minimal Supersymmetric Standard Model. We find that the QCD corrections are quite important, and that the supersymmetric QCD corrections (due to gluino, stop and sbottom exchange) can be comparable to or even larger than the standard QCD corrections in a large region of the supersymmetric parameter space. This is mainly due to the effect of large left-right mixings of stop and sbottom. This could significantly affect the phenomenology of the $H^+$ search.

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