Updated measurements of the M1 transition $\psi (3686)\to \gamma {\eta }_c(2S)$ with ${\eta }_c(2S)\to K\bar{K}\pi$

BESIII Collaboration, M. Ablikim, M. N. Achasov +620

Based on a data sample of $(27.08\pm 0.14)\times 10^8\psi (3686)$ events collected with the BESIII detector at the BEPCII collider, the M1 transition $\psi (3686)\to \gamma {\eta }_c(2S)$ with…