$Ξ$ spectroscopy in photoproduction on a proton target at Jefferson Lab

L. Guo, D. P. Weygand, for the CLAS Collaboration

Published 2006-01-05Version 1

The CLAS Collaboration at Jefferson Lab conducted a photoproduction experiment on a proton target using a tagged photon beam with an energy range of 1.5-3.8 GeV during May-July 2004. With an integrated luminosity of about 75 $pb^{-1}$, this experiment provides the largest data set for photon-proton reactions ever collected. The reaction $\gamma p \to K^+K^+\Xi^{-}(1320)$ has been investigated and the preliminary results of the cross section measurement of $\Xi^-(1320)$ for the photon energy range of 2.7-3.8 GeV have been obtained. In a search for excited cascade states, the reaction of $\gamma p \to K^+K^+\pi^-(\Xi^0(1320))$ has also been explored.