Anomalous dimension of gluonic operator in polarized deep inelastic   scattering at O(1/N_f)
  We compute the O(1/N_f) correction to the predominantly gluonic flavour singlet twist-2 anomalous dimension used in polarized deep inelastic scattering. It is consistent with known two loop perturbation theory and we determine the three loop contribution at O(1/N_f). The treatment of the epsilon-tensor in the large N_f d-dimensional critical point formalism is also discussed. 
J.F. Bennett and J.A. Gracey