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We study the two-body decay of mesons using the covariant helicity formalism.We find that to explain the ratio of partials wave amplitudes (PWAs) of thedecay, the Lagrangian must include derivative interactions in addition tocontact interactions. We estimate the ratios of the coupling constants for thevector decays of the axial-vector, pseudovector and pseudotensor meson, and thetensor decays of the pseudotensor mesons by fitting the ratios of the PWAs tothe available data and predict the ratios to some new decays.

Ratios of Partial Wave Amplitudes in the Decays of $J=1$ and $J=2$ Mesons