Pseuduscalar Heavy Quarkonium Decays With Both Relativistic and QCD Radiative Corrections

Kuang-Ta Chao, Han-Wen Huang, Jing-Hua Liu +1

We estimate the decay rates of ${\eta }_c\to 2\gamma$, ${\eta }_c^{\prime }\to 2\gamma$, and $J/\psi \to e^{+}{e}^{-}$, ${\psi }^{\prime }\to e^{+}{e}^{-}$, by taking into account both relativistic and Q…