NRQCD matrix elements in polarization of J-Psi produced from b-decay
  We present the non-relativistic QCD (NRQCD) prediction for the polarization of the J-Psi produced in b to J-Psi + X, as well as the helicity-summed production rate. We propose that these observables provide a means of measuring the three most important color-octet NRQCD matrix elements involved in J-Psi production. Anticipating the measurement of the polarization parameter alpha, we determine its expected range given current experimental bounds on the color-octet matrix elements. 
Sean Fleming (University of Wisconsin, Madison), Oscar F. Hernandez   (Universite de Montreal), Ivan Maksymyk (University of...