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

Based on a $J/psi$ data sample of $7.8 times 10^6$ events at BESI, the decay of $ J/psi to bar{K}^*(892)^0 K^+ pi^-$ is studied and a low mass enhancement, which is believed not coming from the phase space effect or background, is visible in the $K^+ pi^-$ invariant mass spectrum recoiling against $bar{K}^*(892)^0$. Partial wave analysis of this channel favors this low mass enhancement being a broad $0^{+}$ resonance with the mass and width of $771^{+164}_{-221}pm 55$ MeV/c$^2$ and $220^{+225}_{-169} pm 97$ MeV/c$^2$, respectively.