Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-05-18
Nucl.Phys. B727 (2005) 301-317
Physics
High Energy Physics
High Energy Physics - Phenomenology
18pages,2figures;final version to appear in Nucl.Phys. B
Scientific paper
10.1016/j.nuclphysb.2005.08.013
It is interesting to investigate the OZI-forbidden radiative orthoquarkonium decays $J/\psi\to \gamma\pi^0, \gamma\eta$ and $\gamma\eta'$ in perturbative QCD. In this work without the approximations adopted in literature we carry out a full one-loop calculation which involves integrations of 4-point and 5-point loop functions. Our numerical results are in agreement with the present data. We also briefly discuss the decays of $J/\psi\to \gamma+\rho^0$, as well as $\Upsilon\to \pi^0\gamma, \eta\gamma, \eta'\gamma$.
Li Gaojun
Li Tong
Li Xue-Qian
Ma Wen-Gan
Zhao Shu-Min
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