Study of resonant structure around 1.8 GeV/$c^2$ and $\eta (1405)$ in $J/\psi \to \omega \eta {\pi }^{+}{\pi }^{-}$

BESIII Collaboration

We present results of a study of the decay $J/\psi \to \omega \eta {\pi }^{+}{\pi }^{-}$ using a sample of $(225.2\pm 2.8)\times 10^6$ $J/\psi$ events collected by the BESIII detector, and report the observ…