Measurements of J/ψdecays into ωK \bar{K} πand ϕK \bar{K} π

Abstract

The decays of $J/\ddot{I}ˆ\to \ddot{I}‰K\bar{K}\ddot{I}€$ and $J/\ddot{I}ˆ\to \ddot{I}•K\bar{K}\ddot{I}€$ are studied using $5.8\times 10^7$ $J/\ddot{I}ˆ$ events collected with the Beijing Spectrometer (BESII) at the Beijing Electron-Positron Collider (BEPC). The $K_S^0{K}^{\pm }\ddot{I}{€}^{\mp }$ and $K^{+}{K}^{-}\ddot{I}{€}^0$ systems, produced in $J/\ddot{I}ˆ\to \ddot{I}‰K\bar{K}\ddot{I}€$, have enhancements in the invariant mass distributions at around 1.44 GeV/$c^2$. However, there is no evidence for mass enhancements in the $K\bar{K}\ddot{I}€$ system in $J/\ddot{I}ˆ\to \ddot{I}•K\bar{K}\ddot{I}€$. The branching fractions of $J/\ddot{I}ˆ\to \ddot{I}‰K_S^0{K}^{\pm }\ddot{I}{€}^{\mp }$, $\ddot{I}•K_S^0{K}^{\pm }\ddot{I}{€}^{\mp }$, $\ddot{I}‰K^{\ast }\bar{K}+c.c.$, and $\ddot{I}•K^{\ast }\bar{K}+c.c.$ are obtained, and the $J/\ddot{I}ˆ\to \hat{I}\cdot K_S^0{K}^{\pm }\ddot{I}{€}^{\mp }$ branching fraction is measured for the first time.

18 pages, 10 figures