THE OFF-SHELL AXIAL ANOMALY VIA THE GAMMA-ASTERISK-PI(0)-]GAMMA TRANSITION

The gammapi(0) --> gamma form factor, including the extension off the pion mass-shell, is obtained from a generalized impulse approximation within a QCD-based model field theory known to provide an excellent d escription of the pion charge form factor, This approach implements dr essing of the vertices and propagators consistent: with dynamical chir al symmetry breaking, gauge invariance, quark confinement and perturba tive QCD. Nonperturbative behavior at the real photon vertex is found to generate a logarithmic correction to the large spacelike-q(2) behav ior.