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We present analytical results at four-loop level for the renormalizationconstants and anomalous dimensions of an extended QCD model with one couplingconstant and an arbitrary number of fermion representations. One example ofsuch a model is the QCD plus gluinos sector of a supersymmetric theory wherethe gluinos are Majorana fermions in the adjoint representation of the gaugegroup.  The renormalization constants of the gauge boson, ghost and fermion fieldsare analytically computed as well as those for the ghost-gluon vertex, thefermion-gluon vertex and the fermion mass. All other renormalization constantscan be derived from these. Some of these results were already produced inFeynman gauge for the computation of the beta-function of this model, which wasrecently published. Here we present results for an arbitrary gauge parameter.

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