TTP99-41 Second Order QCD Corrections to the Top Decay Rate
TTP99-41 Second Order QCD Corrections to the Top Decay Rate
TTP99-41 Second Order QCD Corrections to the Top Decay Rate
We report on a recent calculation of the top decay rate up to
order \alpha_s^2. It is based on asymptotic expansions of
the off-shell top propagator, followed by a Pad\'e approximation in
order to reach the physically relevant point q^2=Mt^2.
K.G. Chetyrkin, R. Harlander, T. Seidensticker, and M. Steinhauser