Abstract
It is shown that up to an overall scale the lowest-order QCD corrections to and to are the same in the heavy-top-quark limit. Asymptotically, they are given by , resulting in a reduction in the decay rate by about 9%, rather than 6% reported previously in the literature. This is verified explicitly by an analytic calculation. The application of the equivalence theorem to this process is also discussed.
- Received 29 May 1992
DOI:https://doi.org/10.1103/PhysRevD.46.5196
©1992 American Physical Society