Transverse mass spectra of strange and multiply--strange particles in Pb--Pb collisions at 158 A GeV/c

The WA97 experiment has measured the transverse mass (m sub T) spectra for negative hadrons (h sup -) and strange particles produced at mid-rapidity in Pb-Pb collisions. The increased statistics of analysed data samples allowed us to perform a study of the spectra of K sup 0 sub S , LAMBDA, XI, OMEG...

Descripción completa

Detalles Bibliográficos
Autores principales: Antinori, F, Bakke, H, Beusch, Werner, Bloodworth, Ian J, Caliandro, R, Carrer, N, Di Bari, D, Di Liberto, S, Elia, D, Evans, D, Fanebust, K, Fini, R A, Ftácnik, J, Ghidini, B, Grella, G, Helstrup, H, Holme, A K, Huss, D, Jacholkowski, A, Jones, G T, Kinson, J B, Knudson, K, Králik, I, Lenti, V, Lietava, R, Loconsole, R A, Løvhøiden, G, Manzari, V, Mazzoni, M A, Meddi, F, Michalon, A, Michalon-Mentzer, M E, Morando, M, Norman, P I, Pastircák, B, Quercigh, Emanuele, Romano, G, Safarík, K, Sándor, L, Segato, G F, Staroba, P, Thompson, M, Thorsteinsen, T F, Torrieri, G D, Tveter, T S, Urbán, J, Villalobos Baillie, O, Virgili, T, Votruba, M F, Závada, P
Lenguaje:eng
Publicado: 1999
Materias:
Particle Physics
Acceso en línea:https://dx.doi.org/10.1016/S0375-9474(99)85070-2
http://cds.cern.ch/record/778802
Descripción
Sumario:The WA97 experiment has measured the transverse mass (m sub T) spectra for negative hadrons (h sup -) and strange particles produced at mid-rapidity in Pb-Pb collisions. The increased statistics of analysed data samples allowed us to perform a study of the spectra of K sup 0 sub S , LAMBDA, XI, OMEGA and h sup - as a function of the centrality of the collisions. The data, which correspond to the most central 40% of the total inelastic cross section, have been divided into four centrality classes according to the estimated number of nucleons taking part in the collision. The m sub T spectra, analysed separately for each centrality bin, exhibit only weak (<= 15%) centrality dependence. The deviation of the OMEGA inverse slope from the linear dependence on the particle mass is confirmed even for the most central Pb-Pb collisions.

Ejemplares similares