Further study of double charmonium production in e+ e- annihilation at Belle

Details Further study of double charmonium production in e+ e- annihilation at Belle Further study of double charmonium production in e+ e- annihilation at Belle

2004-12-14

arxiv.org/abs/hep-ex/0412041v1

Physics

High Energy Physics

High Energy Physics - Experiment

Contributed to 32nd International Conference on High-Energy Physics (ICHEP 04), Beijing, China, 16-22 Aug 2004

Scientific paper

We report a new analysis of double charmonium production in e+ e- annihilation using a data sample collected by the Belle experiment. We confirm our previous observation of the processes e+ e- -> J/psi eta_c (chi_c0, eta_c(2S)) and perform an angular analysis for these processes. Processes of the type e+ e- -> psi(2S) (c cbar)_resonant are observed for the first time. We also observe a new charmonium state - X(3940), produced in the process e+ e- -> J/psi X(3940).

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