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arXiv 0804.3770nucl-ex
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在CERN超级质子同步加速器上测量的20 A,30 A,40 A,80 A和158 A GeV Pb+Pb碰撞中λ和Xi产生的能量依赖性

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

NA49 Collaboration

摘要:

给出了20 A、30 A、40 A、80 A和158 A GeV中心Pb+Pb反应中$Λ$、$\barΛ}$、$Ξ^{-}$和$\barΞ^{+}$的产生结果。讨论了横质量谱、快度谱和多重性的能量依赖性。弦强子模型(UrQMD和HSD)和统计强子气体模型的比较。虽然后者提供了一个合理的描述,所有的粒子产量,第一类模型未能匹配的$Ξ^{-}$,和$\barΞ^{+}$多重性。

英文摘要:

Results on $Λ$, $\barΛ}$, $Ξ^{-}$, and $\barΞ^{+}$ 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 $Ξ^{-}$, and $\barΞ^{+}$ multiplicities.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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