2 citations · 2 across the 1 of their papers we have counts for
6 papers
A closed analytical formula for two-loop massive tadpoles with arbitrary tensor numerators
K. G. Chetyrkin
Using the integration by parts method we derive a closed analytical expression for the result of the integration of an arbitrary dimensionally regulated tadpole diagram composed of…
Three-loop Three-Linear Vertices and Four-Loop MOM beta functions in massless QCD
K. G. Chetyrkin, A. Retey
In this paper we present a full set of 2- and 3-point functions for massless QCD at three-loop order in the MSbar scheme. The vertex functions are evaluated at the asymmetric point…
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…
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…
Top Quark Production to
K. G. Chetyrkin, A. H. Hoang, J. H. Kuehn +2
The cross-section for the production of pairs in -annihilation via a virtual photon is determined up to order . For the cm-energies of interest the effect…
Perturbative QCD Corrections to the Boson Width and the Higgs Decay Rate
K. G. Chetyrkin, J. H. Kühn, A. Kwiatkowski
Radiative QCD corrections significantly influence the theoretical predictions for the decay rates of the and the Higgs boson. The status of the QCD calculations to the hadronic…