Effective Vertex for pi-gamma-gamma
arXiv:hep-ph/0210074
Abstract
The π^0γγvertex is used as an explicit example of the subtleties connected with the application of equation of motion within Chiral Perturbation Theory at the order O(p^6).
7 pages, 2 figures; presented at Int. Conf. Renormalization Group 2002, Slovakia, March 2002