ReactionK−p→Λω: 1.2 to 1.8 BeV/c

Abstract

Both total and differential cross sections for the reaction $K^{-}\omega \to \Lambda \omega$ have been determined within the following region of $s$, the total c.m. energy squared, and $t$, the four-momentum-transfer squared: ${\left(1.88\mathrm{} \mathrm{BeV}\right)}^2<s<\mathrm{}{\left(2.09\mathrm{} \mathrm{BeV}\right)}^2$ and $-{\left(1.28\mathrm{} \mathrm{BeV}\right)}^2<t<-{\left(0.29\mathrm{} \mathrm{BeV}\right)}^2$. The decay angular correlations of the $\Lambda$ decay products ($p{\pi }^{-}$) and the $\omega$ decay products (${\pi }^{+}{\pi }^{-}{\pi }^0$) have been systematically determined. In three subregions of $s$ and $t$, the six production amplitudes that describe the reaction have been determined. It is shown that no simple exchange models explain the data and that no striking resonance formation in the direct channel is taking place.