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Collaboration, The NA57; Antinori, F; Bacon, P; Badalà, A; Barbera, R; Belogianni, A; Bhasin, A; Bloodworth, I J; Bombara, M; Bruno, G E; Bull, S A; Caliandro, R; Campbell, M; Carena, W; Carrer, N; Clarke, R F; Dainese, A; Haas, A P de; Rijke, P C de; Bari, D Di; Liberto, S Di; Divià, R; Elia, D; Evans, D; Feofilov, G A; Fini, R A; Ganoti, P; Ghidini, B; Grella, G; Helstrup, H; Hetland, K F; Holme, A K; Jacholkowski, A; Jones, G T; Jovanovic, P; Jusko, A; Kamermans, R; Kinson, J B; Knudson, K; Kolozhvari, A A; Kondratiev, V; Králik, I; Kravčáková, A; Kuijer, P; Lenti, V; Lietava, R; Løvhøiden, G; Manzari, V; Martinská, G; Mazzoni, M A; Meddi, F; Michalon, A; Morando, M; Nappi, E; Navach, F; Norman, P I; Palmeri, A; Pappalardo, G S; Pastirčák, B; Pišút, J; Pišútová, N; Platt, R J; Posa, F; Quercigh, E; Riggi, F; Röhrich, D; Romano, G; Šafařík, K; Šándor, L; Schillings, E; Segato, G; Sené, M; Sené, R; Snoeys, W; Soramel, F; Spyropoulou-Stassinaki, M; Staroba, P; Toulina, T A; Turrisi, R; Tveter, T S; Urbán, J; Valiev, F F; Brink, A van den; Ven, P van de; Vyvre, P Vande; Eijndhoven, N van; Hunen, J van; Vascotto, A; Vik, T; Baillie, O Villalobos; Vinogradov, L; Virgili, T; Votruba, M F; Vrláková, J; Závada, P
Journal of physics. G, Nuclear and particle physics, 06/2004, Letnik: 30, Številka: 6Journal Article
The Na57 experiment has collected high statistics, high purity samples of K$^0_s$ and $\Lambda, \Xi $ and $\Omega$ 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.
