====== 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** | | {{preprints:1999:ttp99-41.pdf|PDF}} {{preprints:1999:ttp99-41.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/9910339|arXiv]] | | |