$Σ^-$ Photoproduction on the Neutron: Results from CLAS

Abstract

As part of a broader study of kaon photoproduction on deuterium, the $γn \to K^{+} Σ^{-} $ 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 $γn \to K^{+} Σ^{-}$ channel was identified by detecting the positive kaon in coincidence with both decay products of the $Σ^-$ hyperon, $π^-$ 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.