Omega and Eta Production inπ+d→ppπ+π−π0at 3.65 BeV/c

Abstract

We have observed ∼3000 examples of the reaction ${\pi }^{+}d\to \mathrm{pp}{\pi }^{+}{\pi }^{-}{\pi }^0$ and report on ∼300 events in which the ${\pi }^{+}{\pi }^{-}{\pi }^0$ mass is in the ${\omega }^0$ mass region and ∼40 events in the ${\eta }^0$ mass region. Differential cross sections are presented. There is evidence for a backward peak in the overall channel. We give values for the ${\omega }^0$ density-matrix elements in the forward direction. Our value for $\mathrm{Re}{\rho }_{10}$ is negative, in disagreement with various theoretical models.