Evidence of $\kappa$ particle in $J/\psi \to {\bar{K}}^{\ast }(892{)}^0{K}^{+}{\pi }^{-}$

J. Z. Bai, H. Q. Zheng, T. N. Ruan

Based on a $J/\psi$ data sample of $7.8\times 10^6$ events at BESI, the decay of $J/\psi \to {\bar{K}}^{\ast }(892{)}^0{K}^{+}{\pi }^{-}$ is studied and a low mass enhancement, which is believed not comin…