PROMPT CHARMONIUM PRODUCTION IN Z-DECAY

The color-evaporation model quantitatively describes all data on photo production and hadroproduction of charmonium. Although the model is in part nonperturbative, the associated parameters can for instance be d etermined from the charmonium photoproduction data. At this point its predictions for the prompt production of psi's at the Z pole are made with no free parameters. We show here that this approach successfully describes all available data on the production of prompt psi's in Z de cays We also comment on the prompt Z decays into other charmonium stat es.