Observation of $\hat{I}{\cdot }_c(1S)\to \hat{I}{\pounds }^0\bar{\hat{I}}{\pounds }^0$ and search for $h_c(1P)\to \hat{I}{\pounds }^0\bar{\hat{I}}{\pounds }^0$ via $\ddot{I}ˆ(3686)$ transitions

BESIII Collaboration, M. Ablikim, M. N. Achasov +776

Using $(2712.4\pm 14.3)\times 10^6\ddot{I}ˆ(3686)$ events collected by the BESIII detector operating at the BEPCII collider, the hadronic decay $\hat{I}{\cdot }_c\to \hat{I}{\pounds }^0\overline{\hat{I}{\pounds }^0}$ is observe…