Stimulated by the recent BESIII observation of a new resonance in $e^{+}{e}^{-}\to \omega {\chi }_{c0}$ which is consistent with our predicted $\psi (4S)$, we estimate the meson loop contribution to $\psi (4S)\to \omega {\chi }_{c0}$ in this work. The evaluation indicates that our theoretical estimate can overlap with the experimental data in a reasonable parameter range. This fact shows that introduction of the missing higher charmonium $\psi (4S)$ provides a possible explanation to the recent BESIII observation. The upper limit of a branching ratio of $\psi (4S)\to \eta J/\psi$ is also predicted to be $1.9\times {10}^{-3}$, which can be further tested by BESIII, Belle, and forthcoming BelleII.

• Received 21 November 2014

DOI:https://doi.org/10.1103/PhysRevD.91.094023