How effective massless fermions modify the anomalous decays of the Goldstone bosons

We consider the consequences of the anomalous Ward identities when both Goldstone bosons and massless fermions appear as low-energy degrees of freedom in confining theories. A general procedure for evaluating the anomalous vertices of the Goldstone bosons is given. We show that these vertices can be described in a compact way. The emerging structures have an intrinsic geometrical meaning. Some particular features occurring when the massless fermions are superpartners of the Goldstone bosons are illustrated on the example of supersymmetric QCD.