Lambda Polarization inK−n→Λπ−at 4.5 GeV/c

An analysis is given of 236 events (102 ± 15 μb) of the reaction $K^{-}n\to \Lambda {\pi }^{-}$ at an incident momentum of 4.5 GeV/c. The lambda polarization is large and positive up to a squared four-momentum transfer of -2.0 ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^2$. The differential cross section has a dip near $-t=0.4\mathrm{}$ ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^2$. The differential cross section for 87 events of the reaction $K^{-}n\to {\Sigma }^0{\pi }^{-}$ is also shown corresponding to a total cross section of 39 ± 10 μb.