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$Λ$ and $\barΛ$ Production in Central Pb-Pb Collisions at 40, 80, and 158 A$\cdot$GeV

The NA49 Collaboration·T. Anticic
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Abstract

Production of Lambda and Antilambda hyperons was measured in central Pb-Pb collisions at 40, 80, and 158 A$\cdot$GeV beam energy on a fixed target. Transverse mass spectra and rapidity distributions are given for all three energies. The $Λ/π$ ratio at mid-rapidity and in full phase space shows a pronounced maximum between the highest AGS and 40 A$\cdot$GeV SPS energies, whereas the $\barΛ/π$ ratio exhibits a monotonic increase.

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The NA49 Collaboration, T. Anticic. 2004-07-20. $Λ$ and $\barΛ$ Production in Central Pb-Pb Collisions at 40, 80, and 158 A$\cdot$GeV. https://doi.org/10.1103/physrevlett.93.022302

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