Observation of psi(3770)--> pi pi J/psi and Measurement of Gamma_{ee}[psi(2S)]

N. E. Adam, CLEO Collaboration

We observe signals for the decays psi(3770)--> X J/psi from data acquired with the CLEO detector operating at the CESR e^+e^- collider with sqrt{s}=3773 MeV. We measure the followi…