The QCD beta-function at O(1/Nf)
Abstract
The leading order coefficients of the beta-function of QCD are computed in a large Nf expansion. They are in agreement with the three loop MSbar calculation. The method involves computing the anomalous dimension of the operator (G2mu nu)2 at the d-dimensional fixed point in the non-abelian Thirring model to which QCD is equaivalent in this limit. The effect the O(1/Nf) corrections have on the location of the infrared stable fixed point for a range of Nf is also examined.
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