Mass corrections in $J/\psi \to B\bar B$ decay and the role of   distribution amplitudes
  We consider mass correction effects on the polar angular distribution of a baryon--antibaryon pair created in the chain decay process $e^-e^+ \to J/\psi \to B\bar B$, generalizing a previous analysis of Carimalo. We show the relevance of the features of the baryon distribution amplitudes and estimate the electromagnetic corrections to the QCD results. 
Francesco Murgia and Maurizio Melis