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1999-10-14
Second Order QCD Corrections to the Top Decay Rate
K. G. ChetyrkinR. HarlanderT. SeidenstickerM. Steinhauser
文献摘要
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.
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