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Search: authors:"K. G. Chetyrkin"

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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.