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Measurements by the Belle Collaboration of the cross section for inclusiveJ/psi production in e^+e^- annihilation have been a serious challenge tocurrent heavy-quarkonium theory. Especially, the measured cross sections forexclusive J/psi+eta_c and inclusive J/psi+cc-bar+X differ from nonrelativisticQCD predictions by an order of magnitude. In order to check if other availablealternative theory can resolve such a large discrepancy, we calculate the crosssection for inclusive J/psi+cc-bar+X based on the color-evaporation model. As aphenomenological model, the color-evaporation model is still employed topredict cross sections for inclusive quarkonium production in variousprocesses. Our results show that the color-evaporation-model prediction is evensmaller than the nonrelativistic QCD prediction by an order of magnitude. Theresultant color-evaporation-model prediction for J/psi+cc-bar+X fraction in theinclusive J/psi production cross section is 0.049, while the empirical valuemeasured by the Belle Collaboration is 0.82.Comment: 8 pages, 3 figures, text improved, version published in Physical  Review

physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology

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Color-evaporation-model calculation ofe+e−→J/ψ+cc¯+Xat