Search for Exclusive Multibody Non-$D\overline{D}$ Decays at the $\psi (3770)$ Resonance

Using data collected at the $\psi (3770)$ resonance with the CLEO-c detector at the Cornell $e^{+}{e}^{-}$ storage ring, we present searches for 25 charmless decay modes of the $\psi (3770)$, mostly multibody final states. No evidence for charmless decays is found.

Figure 1

Distributions for the modes $2({\pi }^{+}{\pi }^{-}){\pi }^0$ [(a) and (b)], $K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$ [(c) and (d)]. The pairs of arrows indicate the signal regions. (a), (c) The scaled total energy. (b) The ${\pi }^{+}{\pi }^{-}{\pi }^0$ invariant mass in $2({\pi }^{+}{\pi }^{-}){\pi }^0$. (d) The $K^{+}{K}^{-}$ invariant mass in $K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$. Filled circle with error bar: $\psi (3770)$ data, solid line: $\psi (3770)\to$ $2({\pi }^{+}{\pi }^{-}){\pi }^0$ or $K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$ Monte Carlo, dashed line: $\psi (3770)\to D\overline{D}\to 2({\pi }^{+}{\pi }^{-}){\pi }^0$ or $K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$ Monte Carlo, shaded histogram: $e^{+}{e}^{-}\to {\gamma }^{*}\to 2({\pi }^{+}{\pi }^{-}){\pi }^0$ or $K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$ from continuum data.