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HK: Hadronen und Kerne

HK 49: Hadronic Probes V, Particle Production

HK 49.7: Vortrag

Mittwoch, 18. März 1998, 16:45–17:00, C

Ξ and Ξ^* production in Σ⁻-, π⁻- und n- nucleus collisions [1] — •H. Neeb — Max-Planck Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg

The WA89 hyperon beam experiment at CERN offers the unique opportunity to study the production of Ξ and Ξ^* resonances under homogeneous conditions with different types of beam on several targets. For Σ⁻ induced reactions we will present x_f distributions for produced Ξ⁻, Ξ⁰(1530), Ξ⁻(1820), and Ξ⁻(1960). The observations will be compared to theoretical predictions obtained within a quark-gluon string model.

A further benefit of the present study is the conformation of not yet fully established resonances and the determination of their corresponding resonance parameters. As an example we report on the first observation of the Ξ⁻π⁺ decay mode of the Ξ⁰(1690).

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