Abstract
We re-evaluate the O( g 2) momentum-subtracted anomalous dimensions of QCD with massive quarks. The QCD equations of motion are used to relate operator matrix elements with different tensor structures. This procedure yields explicitly gauge-invariant anomalous dimensions. Our results differ slightly from those in the literature. The forward Compton amplitude for scattering of massive quarks and a scalar current is examined. The large Q 2 behavior of this amplitude is shown to be simply related to the momentum-subtracted, mass-dependent anomalous dimension.
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