Observation of $e^{+}{e}^{-}\to \gamma X(3872)$ at BESIII

BESIII collaboration, M. Ablikim, M. N. Achasov +372

With data samples collected with the BESIII detector operating at the BEPCII storage ring at center-of-mass energies from 4.009 to 4.420 GeV, the process $e^{+}{e}^{-}\to \gamma X(3872)$…