$\Sigma^-$ Photoproduction on the Neutron: Results from CLAS

Abstract

As part of a broader study of kaon photoproduction on deuterium, the $\gamma n \to K^{+} \Sigma^{-} $ channel was investigated. The data were acquired at Jefferson Lab using the CLAS detector and the Photon-Tagging Facility installed in Hall B. The photon energy range covered was from 0.50 to 2.95 GeV. For the present analysis, the $\gamma n \to K^{+} \Sigma^{-}$ channel was identified by detecting the positive kaon in coincidence with both decay products of the $\Sigma^-$ hyperon, $\pi^-$ and $n$. Preliminary differential cross--sections are shown as a function of the invariant energy W and the kaon polar angle in the center of mass system.