Partial-Wave Analysis of theK+K¯0π−System

We have performed a partial-wave analysis of the $K^{+}{K}_S^0{\pi }^{-}$ system produced in the reaction ${\pi }^{-}p\to K^{+}{\overline{K}}^0{\pi }^{-}n$ at 8 GeV/c. We present the results of the analysis of 30740 events in the mass range 1.24-1.60 GeV/${\mathit{c}}^2$, with $0.0\le -t\le 1.0$ ${\mathrm{GeV}}^2$/${\mathit{c}}^2$. In the 1.28-GeV/${\mathit{c}}^2$ mass region, we see evidence for a $J^{\mathrm{PG}}=0^{-+}$ resonance in addition to the resonant $1^{++}$ wave. We observe a $0^{-+}$ resonance and possibly a small $1^{++}$ resonance in the 1.42-GeV/${\mathit{c}}^2$ region. We also observe a $1^{++}$ state near 1.5 GeV/${\mathit{c}}^2$.