Five-loop fermion anomalous dimension for a general gauge group from four-loop massless propagators

Abstract

We extend the $\mathcal{O}({\alpha }_s^5)$ result of the analytic calculation of the quark mass anomalous dimension in pQCD [1] to the case of a generic gauge group. We present explicit formulas which express the relevant renormalization constants in terms of four-loop massless propagators. We also use our result to shed new light on the old puzzle of the absence of even zetas in results of perturbative calculations for a class of physical observables.

An important reference [47] is corrected

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