Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-06-19
Phys.Rev.D74:074003,2006
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, 3 figures, 1 table. Some descriptions changed, more references added and typos corrected. Published version in PRD
Scientific paper
10.1103/PhysRevD.74.074003
In this work, we evaluate the contributions of the hadronic loops to the amplitudes of $J/\psi\to PV$ where $P$ and $V$ denote light pseudoscalar and vector mesons respectively. By fitting data of two well measured channels of $J/\psi\to PV$, we obtain the contribution from the pure OZI process to the amplitude which is expressed by a phenomenological quantity $|\mathcal{G}^{PV}_{S}|$, and a parameter $\alpha$ existing in the calculations of the contribution of hadronic loops. In terms of $\alpha$ and $|\mathcal{G}^{PV}_{S}|$, we calculate the branching ratios of other channels and get results which are reasonably consistent with data. Our results show that the contributions from the hadronic loops are of the same order of magnitude as that from the OZI processes and the interference between the two contributions are destructive. The picture can be applied to study other channels such as PP or VV of decays of $J/\psi$.
Li Xue-Qian
Liu Xiang
Zeng Xiao-Qiang
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