Exotic Meson Decay to $\omega\pi^{0}\pi^{-}$

TL;DR

This study performs a partial-wave analysis of meson decay processes, revealing decay modes of exotic and known meson states, including new signals for certain isovector states.

Contribution

It provides new insights into the decay channels of exotic mesons and identifies previously unobserved signals for specific meson states.

Findings

Evidence of $b_{1}\pi$ decay in exotic states $\pi_{1}(1600)$ and $\pi_{1}(2000)$

Observation of three isovector $2^{-+}$ states in $\omega ho^{-}$ decay channel

Detection of signals for $\pi_{2}(1880)$ and $\pi_{2}(1970)$

Abstract

A partial-wave analysis of the mesons from the reaction $\pi^{-}% p\to\pi^{+}\pi^{-}\pi^{-}\pi^{0}\pi^{0}p$ has been performed. The data show $b_{1}\pi$ decay of the spin-exotic states $\pi_{1}(1600)$ and \ $\pi_{1}(2000)$. Three isovector $2^{-+}$ states were seen in the $\omega\rho^{-}$ decay channel. In addition to the well known $\pi_{2}(1670)$, signals were also observed for $\pi_{2}(1880)$ and $\pi_{2}(1970)$.