Experimental studies of the ${\pi }^{+}{\pi }^{-}{\pi }^{+}{\pi }^{-}{\pi }^0$, $K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}{\pi }^0$ and $p\bar{p}{\pi }^{+}{\pi }^{-}{\pi }^0$ final states produced in $e^{+}{e}^{-}$ annihilation at $\sqrt{s}=$ 3.773 and 3.650 GeV

Abstract

We report measurements of the observed cross sections for $e^{+}{e}^{-}\to \omega {\pi }^{+}{\pi }^{-}$, $\omega K^{+}{K}^{-}$, $\omega p\bar{p}$, $K^{+}{K}^{-}{\rho }^0{\pi }^0$, $K^{+}{K}^{-}{\rho }^{+}{\pi }^{-}+c.c.$, $K^{\ast 0}{K}^{-}{\pi }^{+}{\pi }^0+c.c.$, $K^{\ast +}{K}^{-}{\pi }^{+}{\pi }^{-}+c.c.$, $\varphi {\pi }^{+}{\pi }^{-}{\pi }^0$ and $\Lambda \bar{\Lambda }{\pi }^0$ at $\sqrt{s}=$ 3.773 and 3.650 GeV. Upper limits (90% C.L.) are given for observed cross sections and for $\psi (3770)$ decay branching fractions for production of these final states. These measurements are made by analyzing the data sets of 17.3 pb${}^{-1}$ collected at $\sqrt{s}=3.773$ GeV and 6.5 pb${}^{-1}$ collected at $\sqrt{s}=3.650$ GeV with the BES-II detector at the BEPC collider.

7 pages,5 figures