Three-gluon decays of radially excited quarkonia $\ddot{I}ˆ(2S)$ and $\hat{I}\yen (2S)$ with both relativistic and QCD radiative corrections

Chao-Jie Fan, Jun-Kang He

For the radially excited heavy quarkonia $V=\ddot{I}ˆ(2S)$ and $\hat{I}\yen (2S)$, the nodal structure of the wave function renders the three-gluon decay $V\to ggg$ acutely sensitive to relativisti…