Quantum chromodynamics and the helicity structure ofψ→γ2++

The helicity structure of $\psi \to \gamma f$ disagrees with a QCD model prediction by $4\sigma$. An empirical rule that yields the data precisely is noted in the hope of elucidating the dynamics. The importance of $\psi \to \gamma \theta$ and $\Upsilon \to \gamma f$ helicity measurements is stressed.