Inclusive production of multistrange hyperons from 11-GeV/cK−p interactions

Large samples of inclusively produced ${\Xi }^{\mathrm{-}}$, ${\Omega }^{\mathrm{-}}$, and ${\Xi }^0$(1530) events are presented from a 1427 events/μb exposure of the large-aperture superconducting-solenoid spectrometer to an 11-GeV/c $K^{\mathrm{-}}$ beam. Production characteristics of these states are compared with other data and shown to be consistent with hyperon exchange. Polarization of ${\Xi }^{\mathrm{-}}$ shows an increase in magnitude with both Feynman x and transverse momentum. The ${\Xi }^{\mathrm{-}}$ decay parameters are measured to be ${\alpha }_{\Xi }$=-0.40±0.03 and ${\Phi }_{\Xi }$=(5±10)° . Results of searches for higher-mass hyperons are presented. The ${\Xi }^{\mathrm{-}}$(1820)→${\Xi }^0$(1530)${\pi }^{\mathrm{-}}$ decay is observed, while we fail to confirm the existence of the ${\Sigma }^{+}$(3170).