Observation and branching fraction measurements of $J/\ddot{I}ˆ\to p\bar{p}{K}_S^0{K}_S^0$ and $\ddot{I}ˆ(3686)\to p\bar{p}{K}_S^0{K}_S^0$

BESIII Collaboration, M. Ablikim, M. N. Achasov +765

Using $(10.087\pm 0.044)\times 10^9$ $J/\ddot{I}ˆ$ events and $(2.712\pm 0.014)\times 10^9$ $\ddot{I}ˆ(3686)$ events collected by the BESIII detector operating at the BEPCII collider, we report the…