Energy dependence of hyperon production in nucleus-nucleus collisions at SPS

F. Antinori, P. A. Bacon, A. Badalà, R. Barbera, A. Belogianni, A. Bhasin, I. J. Bloodworth, M. Bombara, G. E. Bruno, S. A. Bull, R. Caliandro, M. Campbell, W. Carena, N. Carrer, R. F. Clarke, A. Dainese, A. P. De Haas, P. C. De Rijke, D. Di Bari, S. Di LibertoR. Divià, D. Elia, D. Evans, G. A. Feofilov, R. A. Fini, P. Ganoti, B. Ghidini, G. Grella, H. Helstrup, K. F. Hetland, A. K. Holme, A. Jacholkowski, G. T. Jones, P. Jovanovic, A. Jusko, R. Kamermans, J. B. Kinson, K. Knudson, A. A. Kolozhvari, V. Kondratiev, I. Králik, A. Kravčáková, P. Kuijer, V. Lenti, R. Lietava, G. Løvhøiden, V. Manzari, G. Martinská, M. A. Mazzoni, F. Meddi, A. Michalon, M. Morando, E. Nappi, F. Navach, P. I. Norman, A. Palmeri, G. S. Pappalardo, B. Pastirčák, J. Pišút, N. Pišútová, F. Posa, E. Quercigh, F. Riggi, D. Röhrich, G. Romano, K. Šafařík, L. Šándor, E. Schillings, G. Segato, M. Sené, R. Sené, W. Snoeys, F. Soramel, M. Spyropoulou-Stassinaki, P. Staroba, T. A. Toulina, R. Turrisi, T. S. Tveter, J. Urbán, F. Valiev, A. Van Den Brink, P. Van De Ven, P. Vande Vyvre, N. Van Eijndhoven, J. Van Hunen, A. Vascotto, T. Vik, O. Villalobos Baillie, L. Vinogradov, T. Virgili, M. F. Votruba, J. Vrláková, P. Závada

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70 Scopus citations

Abstract

A measurement of strange baryon and antibaryon production in Pb-Pb collisions has been carried out by the NA57 experiment at the CERN SPS, with 40 and 158 AGeV/c beam momentum. Results on Λ, Ξ and Ω hyperon yields at mid-rapidity in the most central 53% of Pb-Pb collisions at 40 AGeV/c are presented and compared with those obtained at higher energy, in the same collision centrality range. The Λ and Ξ- yields per unit rapidity stay roughly constant while those of Ω-, Λ̄, Ξ̄+ and Ω̄+ increase when going to the higher SPS energy. Hyperon yields at the SPS are compared with those from the STAR experiment in sNN=130 GeV Au-Au collisions at RHIC.

Original languageEnglish
Pages (from-to)68-74
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume595
Issue number1-4
DOIs
StatePublished - 12 Aug 2004

Scopus subject areas

  • Nuclear and High Energy Physics

Keywords

  • 12.38.Mh
  • 14.20.Jn
  • 25.75.Dw
  • 25.75.Nq

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