Testing factorization of charmonium production
Theory Division, CERN, CH-1211 Geneva 23, Switzerland (e-mail: Gerhard.Schuler@cern.ch)
Received: 27 April 1998 / Published online: 22 March 1999
Within the NRQCD factorization approach the production of heavy quarkonia can be calculated in perturbative QCD in terms of a few production-process-independent NRQCD matrix elements. We test the universality of these long-distance matrix elements by comparing their values as determined from charmonium production at , , and colliders, and in , , and decays.