Strangeness Production in Heavy Ion Collisions at SPS Energies

Details Strangeness Production in Heavy Ion Collisions at SPS Energies Strangeness Production in Heavy Ion Collisions at SPS Energies

2003-11-05

arxiv.org/abs/hep-ex/0311010v1

Eur.Phys.J.C33:s621-s623,2004

Physics

High Energy Physics

High Energy Physics - Experiment

3 pages, 6 figures, International Europhysics Conference on High Energy Physics, Aachen, Germany, July 2003, submitted to JHEP

Scientific paper

10.1140/epjcd/s2004-03-1721-1

The NA49 collaboration has taken data of central Pb-Pb collisions at beam energies from 20 to 158 GeV per nucleon. The large acceptance of the detector allows to study particle yields in full phase space. In this paper we present recent results on strangeness production (K, $\Lambda$ and $\phi$) in this energy range and compare to measurements at lower and higher energies. The K$^+/\pi^+$ and $\Lambda/\pi$ ratio shows a pronounced maximum around 30 A$\cdot$GeV, whereas the K$^-/\pi^-$ and $\bar{\Lambda}/\pi$ ratio exhibits a continuous rise. The $\phi/\pi$ ratio also increases monotonically with beam energy. First results on multi-strange hyperon production at lower SPS energies are presented.

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