Naslov
Bypassing the axial anomalies

Autori
Kekez, Dalibor ; Klabučar, Dubravko ; Scadron, M.D.

Izvornik
International Journal of Moder Physics A. (0217-751X) 20 (2005), 27; 6189-6199

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
axial anomaly; quark loops; radiative and hadronic decays of mesons

Sažetak
Many meson processes are related to the UA(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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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