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Study of the transverse mass spectra of strange particles in Pb–Pb collisions at 158 A GeV/ c

2004; IOP Publishing; Volume: 30; Issue: 6 Linguagem: Inglês

10.1088/0954-3899/30/6/011

1361-6471

the NA Collaboration, F. Antinori, P A Bacon, Angela Badalà, R. Barbera, A Belogianni, A. Bhasin, I J Bloodworth, M. Bombara, G. Bruno, Stephen Bull, Rocco 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 Liberto, R. Divià, D. Elia, D. Evans, Г. Феофилов, R A Fini, P. Ganoti, B Ghidini, G. Grella, H. Helstrup, K. F. Hetland, A K Holme, A. Jachołkowski, G T Jones, P Jovanovic, A. Jusko, R Kamermans, J.B. Kinson, K. Knudson, A A Kolozhvari, V. Kondratiev, I. Králik, A Krav áková, P.G. 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 Pastir ák, J Pi út, N Pi útová, R. Platt, F. Posa, E. Quercigh, F. Riggi, D. Röhrich, G Romano, Korobeĭnicheva Ik, L ándor, 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. F. Valiev, A. van den Brink, Peter 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,

Quantum Chromodynamics and Particle Interactions

The NA57 experiment has collected high statistics, high purity samples of K0S and Λ, Ξ and Ω hyperons produced in Pb–Pb collisions at 158 A GeV/c. In this paper we present a study of the transverse mass spectra of these particles for a sample of events corresponding to the most central 53% of the inelastic Pb–Pb cross-section. We analyse the transverse mass distributions in the framework of the blast-wave model for the full sample and, for the first time at the SPS, as a function of the event centrality.