Parameters of charmonium states from KEDR

Abstract

We report results of experiments performed with the KEDR detector at the VEPP-4M $e^{+}{e}^{-}$ collider. They include final results for the mass and other parameters of the $J/\psi$, $\psi (2S)$ and $\psi (3770)$ and $J/\psi \to \gamma {\eta }_c$ branching fraction determination.

5 pages, 6 figures, PhiPsi 2013, International Workshop on e+e- collisions from Phi to Psi. September 9-12, 2013, Rome, Italy