Hyperon production from proton-antiproton collisions ats=1.8TeV

The production properties of lambdas (${\Lambda }^0,{\overline{\Lambda }}^0$) and cascades (${\Xi }^{-},{\overline{\Xi }}^{-}$) in the central region in $\overline{p}p$ collisions at $\sqrt{s}=1.8\mathrm{}$ TeV at the Fermilab collider are reported. The transverse-momentum spectra of lambdas are measured as a function of multiplicity and the ratios of lambdas to protons ($p,\overline{p}$) and to all charged particles are studied as a function of transverse momentum and multiplicity. Moreover the average transverse momentum of cascades and the ratio of cascades to lambdas are presented.