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Lambda production in central Pb+Pb collisions at CERN-SPS energies | | A. Mischke
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22 Dec 2001 | | Journal: | J.Phys. G28 (2002) 1761-1768 | | Subject: | nucl-ex | | Affiliation: | for the NA49 Collaboration | | Abstract: | In this paper we present recent results from the NA49 experiment for $Lambda$ and $ar{Lambda}$ 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, $ar{Lambda}$ rapidity distributions have been measured at 40 and 80 A$cdot$GeV, which allows to study the $ar{Lambda}$/$Lambda$ ratio. | | Source: | arXiv, nucl-ex/0201012 | | Services: | Forum | Review | PDF | Favorites | |
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