Journal
PHYSICS LETTERS B
Volume 612, Issue 3-4, Pages 215-222Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2005.03.021
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It is argued that difficulties in reconciling the values of the cross-section a (e(+)e(-) -> J/psi + eta(c)) measured at Belle and calculated within non-relativistic QCD (NRQCD) are caused not by some misinterpretation of the data or other exotic explanations, but by poor applicability of NRQCD to such processes. We use general theory of hard exclusive processes in QCD together with more realistic models of charmonium wave functions, and show that the Belle result can be naturally explained. (c) 2005 Elsevier B.V. All rights reserved.
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