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hep-ph1999
Second Order QCD Corrections to the Top Decay Rate
K. G. Chetyrkin, R. Harlander, T. Seidensticker +1
We report on a recent calculation of the top decay rate up to order α_s^2. It is based on asymptotic expansions of the off-shell top propagator, followed by a Padé approximation in…
hep-ph1999
Automatic application of successive asymptotic expansions of Feynman diagrams
Th. Seidensticker
We discuss the program EXP used to automate the successive application of asymptotic expansions to Feynman diagrams. We focus on the generation of the relevant subgraphs and the de…