Energy dependence of Lambda and Xi production in central Pb+Pb collisions at 20A, 30A, 40A, 80A, and 158A GeV measured at the CERN Super Proton Synchrotron

Abstract

Results on $\Lambda$, $\barΛ}$, ${\Xi }^{-}$, and ${\bar{\Xi }}^{+}$ production in central Pb+Pb reactions at 20A, 30A, 40A, 80A, and 158A GeV are presented. The energy dependence of transverse mass spectra, rapidity spectra, and multiplicities is discussed. Comparisons to string hadronic models (UrQMD and HSD) and statistical hadron gas models are shown. While the latter provide a reasonable description of all particle yields, the first class of models fails to match the ${\Xi }^{-}$, and ${\bar{\Xi }}^{+}$ multiplicities.

16 pages, 16 figures. Finally published version after editorial revision

References in corpus (4)

• Pion and kaon production in central Pb+Pb collisions at 20A and 30A GeV: Evidence for the onset of deconfinement
• Enhancement of hyperon production at central rapidity in 158 A GeV/c Pb-Pb collisions
• Centrality and Energy Dependence of Proton, Light Fragment and Hyperon Production
• Strangeness production at SPS energies

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