The Covariant Approach for the Radiative Decay of the \({J/}\Psi\) Meson and Relation to Amplitudes Extracted in the Helicity Basis

We have developed the covariant approach for the partial wave analysis of the radiative decay of the vector meson into two pseudoscalar mesons based on the orbital momentum- intrinsic spin decomposition. This allowed us to include the data on the radiative \(J/\Psi\) decay into a large data base for analysis of the meson production reactions. The correspondence between partial wave amplitudes extracted in our approach and those extracted in the helicity basis is determined.