Search for ψ(2S)→ηcπ+π-π0
Search for ψ(2S)→ηcπ+π-π0
Using $5.63\text{ }\text{ }{\mathrm{pb}}^{\ensuremath{-}1}$ of data accumulated at the $\ensuremath{\psi}(2S)$ resonance with the CLEO III and CLEO-c detectors corresponding to $3.08\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $\ensuremath{\psi}(2S)$ decays, a search is performed for the decay $\ensuremath{\psi}(2S)\ensuremath{\rightarrow}{\ensuremath{\eta}}_{c}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$ to test a theoretical prediction based upon the assumption that the $c\overline{c}$ pair in the $\ensuremath{\psi}(2S)$ does not annihilate …