Measurement of $J/\psi \to \gamma {\eta }_{\mathrm{c}}$ decay rate and ${\eta }_{\mathrm{c}}$ parameters at KEDR

V. V. Anashin, V. M. Aulchenko, E. M. Baldin +78

Using the inclusive photon spectrum based on a data sample collected at the $J/\psi$ peak with the KEDR detector at the VEPP-4M $e^{+}{e}^{-}$ collider, we measured the rate of the radiativ…