Evidence for Exotic Meson Production in the Reaction ${\pi }^{-}p\to \eta {\pi }^{-}p$ at 18 GeV/c

The E852 Collaboration

The $\eta {\pi }^{-}$ system has been studied in the reaction ${\pi }^{-}p\to \eta {\pi }^{-}p$ at 18 GeV/c. A large asymmetry in the angular distribution is observed indicating interference between L…