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

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 A GeV/c beam momentum. Results on $\Lambda$, $\Xi$ and $\Omega$ hyperon yields at mid-rapidity in the most central 53% of Pb-Pb collisions at 40...

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Detalles Bibliográficos
Autores principales: Antinori, F., Bacon, P.A., Badala, A., Barbera, R., Belogianni, A., Bhasin, A., Bloodworth, I.J., Bombara, M., Bruno, G.E., Bull, S.A., Caliandro, R., Campbell, M., Carena, Wisla, Carrer, N., Clarke, R.F., Dainese, A., de Haas, A.P., de Rijke, P.C., Di Bari, D., Di Liberto, S., Divia, 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., Kralik, I., Kravcakova, A., Kuijer, P., Lenti, V., Lietava, R., Lovhoiden, G., Manzari, V., Martinska, G., Mazzoni, M.A., Meddi, F., Michalon, A., Morando, M., Nappi, E., Navach, F., Norman, P.I., Palmeri, A., Pappalardo, G.S., Pastircak, B., Pisut, Jan, Pisutova, N., Posa, F., Quercigh, E., Riggi, F., Rohrich, D., Romano, G., Safark, K., Sandor, L., Schillings, E., Segato, G., Sene, M., Sene, R., Snoeys, W., Soramel, F., Spyropoulou-Stassinaki, M., Staroba, P., Toulin, T.A., Turrisi, R., Tveter, T.S., Urban, J., Valiev, F., van den Brink, A., van de Ven, P., Vande Vyvre, P., van Eijndhoven, N., van Hunen, J., Vascotto, A., Vik, T., Villalobos Baillie, O., Vinogradov, L., Virgili, T., Votruba, M.F., Vrlakova, J., Zavada, P.
Lenguaje:eng
Publicado: 2004
Materias:
Nuclear Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2004.05.025
http://cds.cern.ch/record/724546
Descripción
Sumario: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 A GeV/c beam momentum. Results on $\Lambda$, $\Xi$ and $\Omega$ hyperon yields at mid-rapidity in the most central 53% of Pb-Pb collisions at 40 A GeV/c are presented and compared with those obtained at higher energy, in the same collision centrality range. The $\Lambda$ and $\Xi^-$ yields per unit rapidity stay roughly constant while those of $\Omega^-$, $\bar\Lambda$, $\bar\Xi^+$ and $\bar\Omega^+$ increase when going to the higher SPS energy. Hyperon yields at the SPS are compared with those from the STAR experiment in $\sqrt{s_{NN}}$ = 130 GeV Au-Au collisions at RHIC.

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