Transition Form-Factors of Pseudoscalar Mesons in Time-Like Region, Obtained in the Approach of the Anomaly Sum Rules
The process ${{e}^{ + }}{{e}^{ - }} \to \gamma * \to {{\pi }^{0}}\gamma $ was considered using time-like pion transition form factor, obtained in the approach of the Anomaly Sum Rules(ASR). Total cross section and angular distribution of the process were calculated. As the result of comparison with the data it was shown that ASR approach provides their good description in a region far from the pole. Also there was proposed a method allowing to give reasonable description of data in the region of pole within ASR approach. The strong restrictions for the parameters of the modified ASR approach were obtained.