Testing J/Psi production mechanisms in B-->J/Psi + X

Abstract

Using the color evaporation model (CEM), we consider the decay rate of B --> J/psi + X and the polarization of J/psi therein, and we compare the results with the data and with the predictions by the,nonrelativistic quantum chromodynamics (NRQCD) approach. In the CEM, we use the input parameter determined from photo/hadro productions of J/psi, and we find that it is difficult to make the CEM predictions confront with the CLEO data on these observables.