Hj. Rothe et N. Sadooghi, A NEW LOOK AT THE AXIAL ANOMALY IN LATTICE QED WITH WILSON FERMIONS -ART. NO. 074502, Physical review. D. Particles and fields, 5807(7), 1998, pp. 4502
By carrying out a systematic expansion of Feynman integrals in the lat
tice spacing, we show that the axial anomaly in the U(1) lattice gauge
theory with Wilson fermions, as determined in one-loop order from an
irrelevant lattice operator in the Ward identity, must necessarily be
identical to that computed from the dimensionally regulated continuum
Feynman integrals for the triangle diagrams. [S0556-2821(98)03917-4].