A study of the Okubo-Zweig-Iizuka rule violations in ${\eta }_c\to VV$

Abstract

We discuss the Okubo-Zweig-Iizuka (OZI) rule violation effects in ${\eta }_c\to VV$ in light of the new data from BES Collaboration. In particular, a possible non-vanishing branching ratio for ${\eta }_c\to \omega \varphi$ provides a hint of the degrees of OZI violations based on a recent factorization proposed for charmonium hadronic decays. The violation mechanism is studied via an intermediate meson exchange model. The results are consistent with the experimental observations.

arXiv comment6 pages, 1 figure; typos corrected; version to appear in Phys. Lett. B

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