Puzzles in charmonium decays

Details Puzzles in charmonium decays Puzzles in charmonium decays

2010-12-13

arxiv.org/abs/1012.2887v1

Nucl. Phys. B (Proc. Suppl.) 207-208, 347 (2010)

Physics

High Energy Physics

High Energy Physics - Phenomenology

Invited talk on the 15th International Conference in QCD, June 28- July 3, 2010, Montpellier, France

Scientific paper

The open charm effects via intermediate hadron loop transitions seem to play a crucial role in the understanding of several existing "puzzles" in charmonium exclusive decays, such as the $\psi(3770)$ non-$D\bar{D}$ decays, and "$\rho\pi$ puzzle" etc. In the charmonium energy region, non-perturbative mechanisms could be still sizeable, and as a consequence the intermediate hadron loop transitions also provide a mechanism for the helicity-selection-rule (HSR) violation. We report our recent progress on those existing puzzles.

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