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Radiative Decays of Charmonium into Light Mesons |
| GAO Ying-Jia;ZHANG Yu-Jie;CHAO Kuang-Ta |
| Department of Physics, Peking University, Beijing 100871 |
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GAO Ying-Jia, ZHANG Yu-Jie, CHAO Kuang-Ta 2006 Chin. Phys. Lett. 23 2376-2378 |
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Abstract We apply perturbative QCD to the radiative decays of charmonia J/ψ and XcJ into light mesons. We perform a complete numerical calculation for the quark--gluon loop diagrams involved in these processes. The calculated J/ψ decay branching ratios into p-wave mesons f2(1270) and f1(1285) fit the data well, while that of f0(980) (if treated as an ss meson) is predicted to be 1.6×10-4, which implies that f0(1710) can not be the ss or (uu+dd)√2 meson. Decays of p-wave charmonia XcJ → ρ (ω,Ф) γ (J=0,1,2) are also studied, and the branching ratio of Xcl → ρ γ is predicted to be 1.4×10-5, which may be tested by CLEO-c ollaboration and BESIII collaboration with future experiments.
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| Keywords:
12.38.Bx
13.25.Hw
14.40.Gx
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Published: 01 September 2006
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