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hep-ph1999
Top production above threshold: Electroweak and QCD corrections combined
J. Kuehn, T. Hahn, R. Harlander
Top quark production in electron-positron annihilation is one of the benchmark reactions at a future linear collider. Both electroweak and QCD corrections are large, amounting to 1…
hep-ph1999
Quark mass effects to σ(e^+e^- -> hadrons) at O(α_s^3)
K. G. Chetyrkin, R. Harlander, J. H. Kuehn
The calculation of the quartic mass terms at order α_s^3 to the hadronic R ratio is described. It is based on the operator product expansion for the quark current correlator, combi…
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…