Dresden 2000 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 15: Postersitzung / Elektromagnetische und hadronische Proben

HK 15.18: Poster

Donnerstag, 23. März 2000, 10:15–12:45, B 69

Hyperon production by Σ⁻, π⁻ and neutrons in WA89 — •Josef Pochodzalla — Max-Planck Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg

We present results on strange particle production obtained by the WA89 CERN hyperon beam experiment. The inclusive production cross sections for Σ^* and Ξ^* resonances have been measured. Strong leading effects are observed for all negative Σ hyperons. The differential cross sections of Λ and K particles show strong non-gaussian and non-thermal enhancements at large transverse momenta. A systematics of the slope parameter for strange and charm particles will be presented. For simultaneously produced Λ Λ and Λ Λ pairs, correlations in x_F were studied. While Λ Λ pairs are consistent with the assumption of identical distribution functions for both Λ, clear deviations from the assumption of equal production probability distributions are seen for coincident Λ pairs are found.

[1] supported by BMBF under contract Nr.05 5HD15I, 06 HD524I and 06 MZ5265

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