Photoproduction of the cascade resonances has been investigated in the reactions $\\gamma p \\to K^+ K^+ (X)$ and $\\gamma p \\to K^+ K^+ \\pi^- (X)$. The mass split of the $\\Xi$ doublet is measured to be $5.4\\pm 1.8$ MeV/c$^2$, consistent with existing measurements. The differential (total) cross sections for the $\\Xi^{-}$ have been determined for photon beam energies from 2.75 to 3.85 (4.75) GeV, and are consistent with a possible production mechanism of $Y^*\\to K^+\\Xi^-$ through a $t$-channel process. The reaction $\\gamma p \\to K^+ K^+ \\pi^-[\\Xi^0]$ has also been investigated in search of excited cascade resonances. No significant signal of excited cascade states other than the $\\Xi^-(1530)$ is observed. The cross section results of the $\\Xi^-(1530)$ have also been obtained for photon beam energies from 3.35 to 4.75 GeV. |
