RESULTS ON THE PRODUCTION OF BARYONS WITH VERTICAL-BAR-S-VERTICAL-BAR=1, 2, 3 AND STRANGE MESONS IN S-W COLLISIONS AT 200 GEV/C PER NUCLEON

We report results on the production of strange baryons/antibaryons with 1, 2, and 3 units of strangeness (Lambda, Xi and Omega) and mesons (K-s(0), K+ and K-) in WA85 experiment at the CERN SPS. This experiment was designed to study the production of strange particles in central SW collisions at 200 GeV/c per nucleon, in the central rapidity region with medium to high p(t). We have measured the inverse slopes of the m(t) distributions of such particles and the production ratios /Lambda, (+)/Xi(-), Xi(-)/Lambda, (+)/, K-s(0)/Lambda, K-s(0)/ (Omega(-) + (+))/(Xi(-) + (+)) and K+/K-. Preliminary results on the production ratios Xi(-)/Lambda and (+)/ in pW collisions at 200 GeV/c are also presented

PRODUCTION OF STRANGE AND MULTISTRANGE HYPERONS AND ANTIHYPERONS IN S-W INTERACTIONS AT 200 GEV/C PER NUCLEON

Strange and multistrange baryon and antibaryon production is a useful probe into the dynamics of the hot hadronic matter created in central heavy ion interactions. Relative production yields and transverse mass spectra are presented for Lambda, ,- Xi(-) and (+) hyperons produced in central sulphur-tungsten interactions at 200 GeV/c per nucleon

CHARGED KAON PRODUCTION IN S-W COLLISIONS AT 200 GEV/C PER NUCLEON

Results on central production of charged kaons in sulphur-tungsten interactions have been obtained by the WA85 Collaboration. The procedure used to select K+ and K- particles, identified through their decay to three charged pions, is described. The m(T) spectra for K+ and K- and the ratio K+/K-, calculated in the kinematic region p(T) greater than or equal to 0.9 GeV/c and 2.3 less than or equal to gamma(LAB) less than or equal to 3.0, are presented

MEASUREMENT OF THE OMEGA/XI-PRODUCTION RATIO IN CENTRAL S-W INTERACTIONS AT 200-A-GEV/C

Strange baryon and in particular multi-strange baryon production is suggested to be a useful probe in the search for quark gluon plasma formation in heavy ion collisions. We have measured the (Omega(-) + ($) over bar Omega(+))/(Xi(-) + ($) over bar Xi(+)) production ratio to be 0.8 +/- 0.4 at central rapidity and p(T) > 1.6 GeV/c

MEASUREMENT OF THE OMEGA/XI-PRODUCTION RATIO IN CENTRAL S-W INTERACTIONS AT 200-A-GEV/C

Strange baryon and in particular multi-strange baryon production is suggested to be a useful probe in the search for quark gluon plasma formation in heavy ion collisions. We have measured the (Omega(-) + ($) over bar Omega(+))/(Xi(-) + ($) over bar Xi(+)) production ratio to be 0.8 +/- 0.4 at central rapidity and p(T) > 1.6 GeV/c

Hyperon production in proton-tungsten interactions at 200 GeV/c

The relative production yields and transverse mass spectra for Lambda,<(Lambda)over bar>,E(-) and (E) over bar(+) hyperons in proton-tungsten interactions are presented and compared with the WA85 results from central sulphur-tungsten interactions. A study of the negative particle yield has also bean undertaken and the ratio of Lambda hyperons to negative particles has been calculated

CHARGED KAON PRODUCTION IN S-W COLLISIONS AT 200 GEV/C PER NUCLEON

Results on central production of charged kaons in sulphur-tungsten interactions have been obtained by the WA85 Collaboration. The procedure used to select K+ and K- particles, identified through their decay to three charged pions, is described. The m(T) spectra for K+ and K- and the ratio K+/K-, calculated in the kinematic region p(T) greater than or equal to 0.9 GeV/c and 2.3 less than or equal to gamma(LAB) less than or equal to 3.0, are presented

Study of K-s(0), Lambda and (Lambda)over-bar production in S-W collisions at 200 GeV/c per nucleon

Results on K-s(0) production at central rapidity in sulphur-tungsten interactions are presented. The selection procedure used to identify K-s(0) particles through their decay to two charged pions is described. The m(T) spectra for K-s(0), Lambda and and the relative production rates K-s(0)/Lambda and K-s(0)/ calculated in the kinematic region p(T) > 1 GeV/c and 2.5 less than or equal to gamma(LAB) less than or equal to 3.0, are discussed

Hyperon production in proton-tungsten interactions at 200 GeV/c

The relative production yields and transverse mass spectra for Lambda,,E(-) and (E) over bar(+) hyperons in proton-tungsten interactions are presented and compared with the WA85 results from central sulphur-tungsten interactions. A study of the negative particle yield has also bean undertaken and the ratio of Lambda hyperons to negative particles has been calculated