| Jefferson Lab kaon experiments E91016/E93018 produced data on both strangeness and vector meson electroproduction. The latter part of the experiments was focused on the electroproduction of the ω meson for momentum transfer Q2 near 0.5 (GeV/c)2. This reaction was selected from the inelastic ep channel. 1H(e, e ′p)X, by performing involved signal background separation. Tagging the ω meson production only on electron and proton not only introduced appreciable statistical error but also a sizeable systematic uncertainty due to the background removal. Nevertheless, the analysis yielded angular distributions of the differential cross section in the threshold regime extracted with an unprecedented granularity and relatively small errors. |
