Lambda production in central Pb+Pb collisions at CERN-SPS energies

Abstract

In this paper we present recent results from the NA49 experiment for $\Lambda$ and $\bar{\Lambda }$ hyperons produced in central Pb+Pb collisions at 40, 80 and 158 A$\cdot$GeV. Transverse mass spectra and rapidity distributions for $\Lambda$ are shown for all three energies. The shape of the rapidity distribution becomes flatter with increasing beam energy. The multiplicities at mid-rapidity as well as the total yields are studied as a function of collision energy including AGS measurements. The ratio $\Lambda /\pi$ at mid-rapidity and in 4$\pi$ has a maximum around 40 A$\cdot$GeV. In addition, $\bar{\Lambda }$ rapidity distributions have been measured at 40 and 80 A$\cdot$GeV, which allows to study the $\bar{\Lambda }$/$\Lambda$ ratio.

SQM proceedings. J. Phys. G: Nucl. Part. Phys.: submitted

References in corpus (2)

• Maximum Relative Strangeness Content in Heavy Ion Collisions Around 30 A.GeV
• Production and collective behavior of strange particles in Au + Au collisions at 2--8 AGeV

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