Axial anomaly and vector meson dominance model
Ya. Klopot+, A. Oganesian+*, O. Teryaev+
+Bogoliubov Laboratory of Theoretical Physics,
Joint Institute for Nuclear Research, 141980 Dubna, Russia
*Alikhanov Institute of Theoretical and Experimental Physics, 117218 Moscow, Russia
A connection between the axial anomaly and the vector meson dominance model
is revealed for the processes of pseudoscalar meson-photon transitions.
The analytical continuation of the anomaly sum rules, which are exact QCD
relations following follow from the dispersive representation of the axial
anomaly, to the time-like region is performed. Using these sum rules, the
transition form factors of π0, η, and η' mesons in this
region are calculated.
A good agreement with the available experimental data is found.