Study of $\ddot{I}{‡}_{cJ}\to \hat{I}\cdot \hat{I}\cdot \hat{I}{\cdot }^{\prime }$ via intermediate charmed meson loop mechanisms and its implications for non-observation of $\hat{I}{\cdot }_1(1855)$ in $\ddot{I}{‡}_{cJ}$ decays

Xin-Ru Wang, Shu-Qi Wang, Shi-Dong Liu +3

Recently, the BESIII Collaboration reported the first observation of the decays $\ddot{I}{‡}_{cJ}\to \hat{I}\cdot \hat{I}\cdot \hat{I}{\cdot }^{\prime }$ in order to search for the $1^{-+}$ exotic state $\hat{I}{\cdot }_1(1855)$. A partial…