Comment on "e+ e- annhilation into J/psi J/psi"
Belle Collaboration, Ken Abe · arXiv (Cornell University) · 2003
Using a data sample of 101.8 fb collected by the Belle detector at the KEKB asymmetric energy e+ e- collider, we confirm our published observation of e+ e- -> J/psi eta_c and find no evidence for the process e+ e- -> J/psi J/psi. The latter process was suggested as means to explain the large discrepancy between the published Belle result and theoretical predictions.