D. Kekez, D. Klabucar, M. D. Scadron
Published 2005-12-09Version 1
Many meson processes are related to the U_A(1) axial anomaly, present in the Feynman graphs where fermion loops connect axial vertices with vector vertices. However, the coupling of pseudoscalar mesons to quarks does not have to be formulated via axial vertices. The pseudoscalar coupling is also possible, and this approach is especially natural on the level of the quark substructure of hadrons. In this paper we point out the advantages of calculating these processes using (instead of the anomalous graphs) the Feynman graphs where axial vertices are replaced by pseudoscalar vertices. We elaborate especially the case of the processes related to the Abelian axial anomaly of QED, but we speculate that it seems possible that effects of the non-Abelian axial anomaly of QCD can be accounted for in an analogous way.
Comments: 12 pages, 4 figures, uses ws-ijmpa.cls, published in the proceedings of MRST 2005 conference, Utica, New York, 16-18 May 2005
Journal: Int.J.Mod.Phys.A20:6189-6199,2005
Circumventing the axial anomalies and the strong CP problem
Electromagnetic structure and weak decay of pseudoscalar mesons in a light-front QCD-inspired model
Charge form factors of pseudoscalar mesons
