Spin and Parity Analysis ofKK¯πSystem in theDandEIotaRegions

Abstract

We have performed a high-statistics experiment on the reaction ${\pi }^{-}p\to K^{+}{\overline{K}}^0{\pi }^{-}n$ at 8.0 GeV/c. A Dalitz-plot analysis of the $K^{+}{\overline{K}}^0{\pi }^{-}$ system finds that the $D\left(1285\right)\mathrm{}$ is a $J^{\mathrm{PG}}=1^{++}$ state coupling predominantly to a $\delta \pi$ decay channel, while the $E\left(1420\right)\mathrm{}$ peak consists mostly of a $J^{\mathrm{PG}}=0^{-+}$ wave with a substantial $\delta \pi$ decay mode. There is little evidence of a $1^{++}$ resonance at the $E$ mass.