Partial-wave analysis of $J/\psi \to {K}^{+}{K}^{-}{\pi }^{0}$

A partial-wave analysis of the decay $J/\psi \to {K}^{+}{K}^{-}{\pi }^{0}$ has been made using $\left(223.7±1.4\right)×{10}^{6}\text{}\text{}J/\psi $ events collected with the BESIII detector in 2009. The analysis, which is performed within the isobar-model approach, reveals contributions from ${K}_{2}^{*}\left(1430{\right)}^{±}$, ${K}_{2}^{*}\left(1980{\right)}^{±}$ and ${K}_{4}^{*}\left(2045{\right)}^{±}$ decaying to ${K}^{±}{\pi }^{0}$. The two latter states are observed in $J/\psi $ decays for the first time. Two resonance signals decaying to ${K}^{+}{K}^{-}$ are also observed. These contributions cannot be reliably identified and their possible interpretations are discussed. The measured branching fraction $B\left(J/\psi \to {K}^{+}{K}^{-}{\pi }^{0}\right)$ of $\left(2.88±0.01±0.12\right)×{10}^{-3}$ is more precise than previous results. Branching fractions for the reported contributions are presented as well. The results of the partial-wave analysis differ significantly from those previously obtained by BESII and BABAR.