First measurements of the branching fractions of $J/\psi$ and $\psi (3686)\to {\Sigma }^0{\bar{\Sigma }}^0\eta$

BESIII Collaboration, M. Ablikim, M. N. Achasov +771

Based on $(10087\pm 44)\times 10^6$ $J/\psi$ and $(2712\pm 14)\times 10^6$ $\psi (3686)$ events collected with the BESIII detector at the BEPCII collider, the hadronic decays $J/ψ\to…