BLM scale for the pion transition form factor
  We review the determination of the NLO Brodsky-Lepage-Mackenzie (BLM) renormalization scale for the pion transition form factor. We argue that the prediction for the pion transition form factor is independent of the factorization scale at every order in the strong coupling constant. 
Blazenka Melic, Bene Nizic, Kornelija Passek