Is the BELLE result for the cross section e+e- -> J/Psi+eta_c a real difficulty for QCD ?

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  • 22 December 2004
Abstract
It is shown that difficulties in reconciling the values of the cross section e+e- -> J/Psi+eta_c measured by BELLE and calculated within the non-relativistic QCD (NRQCD) are caused not by some misinterpretation of the data or other exotic explanations, but by a poor applicability of NRQCD to such processes. We use the general theory of hard exclusive processes in QCD together with more realistic models of relativistic wave functions of charmonium, and show that the BELLE result can be explained naturally.

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