Observation of ${\eta }_c(1S)\to {\Sigma }^0{\bar{\Sigma }}^0$ and search for $h_c(1P)\to {\Sigma }^0{\bar{\Sigma }}^0$ via $\psi (3686)$ transitions

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

Using $(2712.4\pm 14.3)\times 10^6\psi (3686)$ events collected by the BESIII detector operating at the BEPCII collider, the hadronic decay ${\eta }_c\to {\Sigma }^0\overline{{\Sigma }^0}$ is observed fo…