Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-12-24
Phys.Rev.D81:074006,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages, 3 figures, 1 table. Title changed, references added, typos corrected and presentation improved. We have removed the c
Scientific paper
10.1103/PhysRevD.81.074006
In this work, we discuss the contribution of the mesonic loops to the decay rates of $\chi_{c1}\to \phi\phi,\,\omega\omega$ which are suppressed by the helicity selection rules and $\chi_{c1}\to \phi\omega$ which is a double-OZI forbidden process. We find that the mesonic loop effects naturally explain the clear signals of $\chi_{c1}\to \phi\phi,\,\omega\omega$ decay modes observed by the BES collaboration. Moreover, we investigate the effects of the $\omega-\phi$ mixing which may result in the order of magnitude of the branching ratio $BR(\chi_{c1} \to \omega \phi)$ being $10^{-7}$. Thus, we are waiting for the accurate measurements of the $BR(\chi_{c1} \to \omega \omega)$, $BR(\chi_{c1} \to \phi \phi)$ and $BR(\chi_{c1} \to \omega \phi)$, which may be very helpful for testing the long-distant contribution and the $\omega-\phi$ mixing in $\chi_{c1}\to\phi\phi,\,\omega\omega,\,\omega\phi$ decays.
Chen Dian-Yong
He Jun
Li Xue-Qian
Liu Xiang
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