Strange hyperon and antihyperon production from quark and string-rope matter

Abstract

Hyperon and antihyperon production is investigated using two microscopical models: {\bf (1)} the fast hadronization of quark matter as given by the ALCOR model; {\bf (2)} string formation and fragmentation as in the HIJING/B model. We calculate the particle numbers and momentum distributions for Pb+Pb collisions at CERN SPS energies in order to compare the two models with each other and with the available experimental data. We show that these two theoretical approaches give similar yields for the hyperons, but strongly differ for antihyperons.

11 pages, Latex, 3 EPS figures, contribution to the Proceedings of the 4th International Conference on Strangeness in Quark Matter (SQM'98), Padova, Italy, 20-24 July 1998

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• Chemical Nonequilibrium in High Energy Nuclear Collisions
• Particle Spectra from the ALCOR Model
• The dependence of strange hadron multiplicities on the speed of hadronization
• Hadronization of massive quark matter

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• Parton cascade and coalescence
• A Microscopic Picture of Strangeness Production at the SPS
• Energy dependence of transverse quark flow in heavy ion collisions
• Probing the Frontiers of QCD
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• Quo Vadis Strangeness? Strangeness - Open Questions
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• Quark Coalescence and Hadronic Equilibrium
• Strange hadron ratios from quark coalescence at RHIC and LHC
• Strange hadron yields and ratios in heavy ion collisions at RHIC energy