Anomalous dimension of non-singlet quark currents at O(1/Nf2) in QCD
D. B. Ali, J. A. Gracey
Abstract
We compute the O(1/Nf2) corrections to the flavour non-singlet quark bilinear currents in QCD in arbitrary spacetime dimensions. Hence, the anomalous dimension of the QED current ψ σμν ψ is deduced at four loops in the MSbar scheme up to one unknown parameter.
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