Observation of $\ddot{I}ˆ(3686)\to \hat{I}{ž}^{-}{K}_S^0\bar{\hat{I}}{\text{c◯}}^{+}$+c.c

BESIII Collaboration, M. Ablikim, M. N. Achasov +678

Using a sample of $(2.712\pm 0.014)\times 10^9$ $\ddot{I}ˆ(3686)$ events collected with the BESIII detector at the electron positron collider BEPCII, the decay $ψ(3686) \to Ξ^- K^0_S…