7 papers
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…
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…
Expansion Techniques in Massive Quark Production: Results and Applications
J. H. Kuehn
Recent progress in the calculation of multi-loop, multi-scale diagrams is reviewed. Expansion techniques combined with new developments in Computer algebra allow to evaluate the R…
Theoretical Aspects of Decays
J. H. Kuehn, E. Mirkes, J. Willibald
Predictions based on the chirally normalized vector meson dominance model for decay rates and distributions of decays into final states are discussed. Disagreements wi…
CP Violation from Charged Higgs Exchange in Hadronic Tau Decays with Unpolarized Beams
J. H. Kuehn, E. Mirkes
CP violating signals in semileptonic decays induced by an exotic scalar exchange are studied in a completely model-independent way. These can be observed in decays of unpolariz…
Heavy Flavor Production and Decay
J. H. Kuehn
Recent theoretical results on heavy flavor production and decay in the framework of perturbative QCD are reviewed. This includes calculations for top production at hadron colliders…