Decay of theψ(3770)to light hadrons

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Abstract

We describe a search for $\ensuremath{\psi}(3770)$ decay to two-body non-$D\overline{D}$ final states in ${e}^{+}{e}^{\ensuremath{-}}$ data produced by the CESR collider and analyzed with the CLEO-c detector. Vector-pseudoscalar production ${\ensuremath{\rho}}^{0}{\ensuremath{\pi}}^{0}$, ${\ensuremath{\rho}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$, $\ensuremath{\omega}{\ensuremath{\pi}}^{0}$, $\ensuremath{\phi}{\ensuremath{\pi}}^{0}$, $\ensuremath{\rho}\ensuremath{\eta}$, $\ensuremath{\omega}\ensuremath{\eta}$, $\ensuremath{\phi}\ensuremath{\eta}$, $\ensuremath{\rho}{\ensuremath{\eta}}^{\ensuremath{'}}$, $\ensuremath{\omega}{\ensuremath{\eta}}^{\ensuremath{'}}$, $\ensuremath{\phi}{\ensuremath{\eta}}^{\ensuremath{'}}$, ${K}^{*0}\overline{{K}^{0}}$, and ${K}^{*+}{K}^{\ensuremath{-}}$ is studied along with that of ${b}_{1}\ensuremath{\pi}$ (${b}_{1}^{0}{\ensuremath{\pi}}^{0}$ and ${b}_{1}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$) and ${\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$. The largest amount of disagreement between the expected rate for ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\gamma}}^{*}\ensuremath{\rightarrow}X$ and that for ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}X$ at $\sqrt{s}=3.773\text{ }\mathrm{GeV}$ is found for $X=\ensuremath{\phi}\ensuremath{\eta}$, at an excess cross section of $(2.4\ifmmode\pm\else\textpm\fi{}0.6)\text{ }\mathrm{pb}$ [${\ensuremath{\Gamma}}_{\ensuremath{\phi}\ensuremath{\eta}}^{\ensuremath{\psi}(3770)}=(7.4\ifmmode\pm\else\textpm\fi{}1.6)\text{ }\mathrm{keV}$], and a suggestive suppression is seen for ${\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$ and $\ensuremath{\rho}\ensuremath{\pi}$. We conclude with form factor determinations for $\ensuremath{\omega}{\ensuremath{\pi}}^{0}$, $\ensuremath{\rho}\ensuremath{\eta}$, and $\ensuremath{\rho}{\ensuremath{\eta}}^{\ensuremath{'}}$.

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