HYPERON PRODUCTION IN 28 GEV C PROTON-PROTON INTERACTIONS/

A study of hyperon production in fully reconstructed proton-proton int eractions at 28 GeV/c (root s=7.3 GeV) is presented. Features of the d ata are presented with the aid of a phenomenological model, the LPM, t hat was developed to study Lambda production reactions. We note the si milarities between Lambda reactions and other families of reactions, a nd show that this surprisingly simple model can be easily adapted to X i(-) production reactions, The only significant difference between the Lambda and Xi(-) data is the observation that Lambda hyperons are pro duced as leading particles, whereas Xi(-) hyperons are not. Production cross sections for eight high-multiplicity hyperon reactions are pres ented.