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5 papers
Recent progress in computing four-loop massive correlators
K. G. Chetyrkin, J. H. Kühn, C. Sturm
We report about recent progress in computing four-loop massive correlators. The expansion of these correlators in the external momentum leads to vacuum integrals. The calculation o…
Strange Quark Mass from Tau Lepton Decays with O(alpha_s^3) Accuracy
P. A. Baikov, K. G. Chetyrkin, J. H. Kühn
The first complete calculation of the quadratic quark mass correction to the correlator of the two currents relevant for the strangeness-changing semihadronic tau-decay rate is pre…
Heavy-quark vacuum polarization: first two moments of the O(alphas^3 nf^2) contribution
K. G. Chetyrkin, J. H. Kuhn, P. Mastrolia +1
The vacuum polarization due to a virtual heavy quark pair and specifically the coefficients of its Taylor expansion in the external momentum are closely related to moments of the c…
Fermionic and Scalar Corrections for the Abelian Form Factor at Two Loops
B. Feucht, J. H. Kühn, S. Moch
Two-loop corrections for the form factor in a massive Abelian theory are evaluated, which result from the insertion of massless fermion or scalar loops into the massive gauge boson…
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…