Observation of ${\eta }_c$ decay into ${\Sigma }^{+}{\bar{\Sigma }}^{-}$ and ${\Xi }^{-}{\bar{\Xi }}^{+}$ final states

The BESIII Collaboration, M. Ablikim, M. N. Achasov +349

Using a data sample of $2.25\times 10^8$ $J/\psi$ events collected with the BESIII detector, we present the first observation of the decays of ${\eta }_c$ mesons to ${\Sigma }^{+}{\bar{\Sigma }}^{-}$ and…