Energy dependence of strangeness production

Abstract

We present a summary of strange particle yields measured by the experiment NA49 in central Pb+Pb collisions in the beam energy range 20-158 AGeV. The comparison with thermal hadron model results shows that above 30 AGeV, a strangeness undersaturation parameter gamma_S must be employed to describe the data. This suggests a change in the strangeness production mechanism at this energy. We find that the UrQMD transport model in all cases underpredicts the observed particle yields.

Submitted to J. Phys. G (Proceedings of the 8th International Conference on Strangeness in Quark Matter, Cape Town, South Africa, September 15-20, 2004). 10 pages, 5 eps figures. Uses iopart.cls. Version 2: Slight changes according to referee report

References in corpus (2)

• Review of Results from the NA49 Collaboration
• Hyperon production in Pb+Pb collisions at the CERN-SPS

Cited by in corpus (5)

• Hadron production in central nucleus-nucleus collisions at chemical freeze-out
• Energy dependence of phi meson production in central Pb+Pb collisions at sqrt(s_nn) = 6 to 17 GeV
• Review of Results from the NA49 Collaboration
• Transverse dynamics of Pb-Pb collisions at 40 A GeV/c viewed by strange hadrons
• Collision Energy Dependence of Particle Ratios and Freeze-out Parameters in Ultra Relativistic Nucleus Nucleus Collisions