Spin Correlations and Velocity-Scaling in NRQCD Matrix Elements
  We compute spin-dependent matrix elements for decays of S-wave quarkonia in lattice NRQCD. They appear to be in approximate agreement with the velocity-scaling rules of NRQCD. 
Geoffrey T. Bodwin (Argonne), Jungil Lee (Korea U), D. K. Sinclair   (Argonne)