Chiral symmetry of QCD can be exploited to build an effective field theory, the Chiral Perturbation Theory ($\chi PT$), which allows to describe the interactions of light mesons at low energies, where the standard perturbative expansion in the strong coupling constant is no longer possible.

Verification of the predictions of $\chi PT$ and other low-energy phenomenological models in processes such as the \rgammatpi, \rpigammapieta, \rkgammakpi, which are driven by the chiral anomaly, is important for understanding the low-energy interactions of hadrons.

This work focuses on the experimental verification of the strengths of so-called anomalous couplings, specifically the coupling of the \rgammatpi\ process, denoted as \ftpi, as well as other possible measurements aimed at testing the predictions of the chiral anomaly.