Analysis of the angular distribution of the baryons produced in $e^+e^-\to J/\psi,\psi(2S) \to \Xi^-\bar\Xi^+$ and $\Sigma^{*\mp}\bar\Sigma^{*\pm}$. Gives information about the decay and is useful for testing correlations in hadron decays. Beam energy must be specified as analysis option "ENERGY" when rivet-merging samples.