Enhancement of strange and multi-strange hyperons and anti-hyperons in S-S and S-W interactions at 200 Gev/c

摘要

Strange and multistrange hyperon production is expected to be enhanced in heavy ion interactions if a phase transition from hadronic matter to a quark-gluon plasma takes place. The production yiedls of #LAMBDA#s,#LABDAs#-bars,#XI#s, and #XI#-bar~+s relative to the production of negative particles are presented for p-W, p-S, S-W, and S-S interactions at 200 GeV/c per nucleon and compared to those from p-Pb and Pb-Pb interactions at 158 GeV/c per nucleon. In particular, enhancements of strange and multistrange hyperons will be presented where hyperon yields are normalized to the yields of negative particles.