Observation of the $X(2370)$ in $J/\psi \to \gamma K_S^0{K}_S^0{\pi }^0$ and $J/\psi \to \gamma {\pi }^0{\pi }^0\eta$

BESIII Collaboration, M. Ablikim, M. N. Achasov +769

Based on $(10087\pm 44)\times 10^6$ $J/\psi$ events collected with the BESIII detector, the $J/\psi \to \gamma K_S^0{K}_S^0{\pi }^0$ and $J/\psi \to \gamma {\pi }^0{\pi }^0\eta$ processes are stu…