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QCD corrections to the charged Higgs boson decay of a heavy quark

1993; American Physical Society; Volume: 48; Issue: 9 Linguagem: Inglês

10.1103/physrevd.48.4183

1538-4500

Andrzej Czarnecki, Sacha Davidson,

Black Holes and Theoretical Physics

We present an analytic formula for the $O({\ensuremath{\alpha}}_{s})$ corrections to the decay $t\ensuremath{\rightarrow}{H}^{+}b$ for nonzero ${m}_{H}$ and ${m}_{b}$. The equivalence theorem is used to relate these corrections to those for the process $t\ensuremath{\rightarrow}{W}^{+}b$. Contrary to previously published results we find that the effect of the $b$ quark mass is negligible for a wide range of ${m}_{t}$, ${m}_{H}$, and $tan\ensuremath{\beta}$.