Measurement of ${\Gamma }_{ee}\times {\mathcal{B}}_{\mu \mu }$ for $\psi (2S)$ meson

V. V. Anashin, O. V. Anchugov, V. M. Aulchenko +86

The product of the electronic width of the $\psi (2S)$ meson and the branching fraction of its decay to the muon pair was measured in the $e^{+}{e}^{-}\to \psi (2S)\to {\mu }^{+}{\mu }^{-}$ process…