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Search: authors:"K. G. Chetyrkin"

3 papers found.
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Five-loop renormalisation of QCD in covariant gauges

We present the complete set of vertex, wave function and charge renormalisation constants in QCD in a general simple gauge group and with the complete dependence on the covariant gauge parameter ξ in the minimal subtraction scheme of conventional dimensional regularisation. Our results confirm all already known results, which were obtained in the Feynman gauge, and allow the...

Four-loop renormalization of QCD with a reducible fermion representation of the gauge group: anomalous dimensions and renormalization constants

We present analytical results at four-loop level for the renormalization constants and anomalous dimensions of an extended QCD model with one coupling constant and an arbitrary number of fermion representations. One example of such a model is the QCD plus gluinos sector of a supersymmetric theory where the gluinos are Majorana fermions in the adjoint representation of the gauge...

Quark mass and field anomalous dimensions to \( \mathcal{O}\left({\alpha}_s^5\right) \)

We present the results of the first complete analytic calculation of the quark mass and field anomalous dimensions to \( \mathcal{O}\left({\alpha}_s^5\right) \) in QCD.