arXiv:hep-ph/9608413·v1·High Energy Physics — Phenomenology
NRQCD matrix elements in polarization of J-Psi produced from b-decay
Sean Fleming (University of Wisconsin, Madison)🇺🇸 · Oscar F. Hernandez (Universite de Montreal)🇨🇦 · Ivan Maksymyk (University of Texas, Austin)🇺🇸 · Helene Nadeau (McGill University, Montreal)🇨🇦
Abstract
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.
Comments: 9 pages, Revtex, 2 figures