Evidence for New 0− S Resonances in the π+π−π− Systems

Abstract

Partial-wave analysis has been performed on 120 000 ${\pi }^{-}{\pi }^{-}{\pi }^{+}$ events coherently produced on nuclear targets in a ${\pi }^{-}$ beam of 40 GeV/c. Evidence has been found for a $0^{-}$ $S$ resonance at 1.24 GeV with a width $\Gamma \approx 0.36$ GeV. The data also suggest the presence of another $0^{-}$ $S$ resonance of similar width near 1.8 GeV. These observations can be interpreted as radial excitations of the $\pi$ meson.