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Bochum 1998 – scientific programme

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HK: Hadronen und Kerne

HK 2: Heavy Ion Reactions I, Ultrarelativistic Energies

HK 2.8: Talk

Monday, March 16, 1998, 16:00–16:15, P

Ξ Production in Central Pb+Pb Collisions at 158 A·GeV* — •F. Gabler1, C. Bormann1, M. Gaździcki1, J. Grebieszkow2, G. Odyniec3, W. Retyk2, D. Röhrich1, R. Stock1, and H. Ströbele11Institut für Kernphysik, Universität Frankfurt, August Euler-Str. 6, D-60486 Frankfurt — 2Institute for Experimental Physics, University of Warsaw, Poland — 3LBNL, University of California,Berkeley,USA

The large acceptance of the NA49 experiment at the CERN SPS facilitates the study of strange and multi-strange hadron production in central Pb+Pb reactions at 158 A·GeV within a wide range in rapidity and transverse momentum. Time Projection Chambers with high precision momentum resolution allow to reconstruct and identify neutral strange and charged multi-strange particles by means of their typical decay topologies.
First results on double strange Ξ- and Ξ-hyperons measured in central Pb+Pb reactions will be presented. The inverse slope parameter T of the Ξ+ Ξ transverse mass spectrum was found to be >300 MeV. The production ratios of the different singly and doubly strange hadrons will also presented. The rapidity distributions of Λ and Λ produced in central Pb+Pb collisions will be compared with other collision systems.

*Supported by BMBF and Graduiertenkolleg Frankfurt

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