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

Antinori, F.; Bacon, P. A.; 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.; De Haas, A. P.; De Rijke, P. C.; Di Bari, D.; Di Liberto, S.; 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.; 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.; 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.; Vrláková, J.; Závada, P

doi:10.1016/j.physletb.2004.05.025

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(-), A, (Xi) over bar (+) and (Omega) over bar (+) increase when going to the higher SPS energy. Hyperon yields at the SPS are compared with those from the STAR experiment in root(s)NN = 130 GeV Au-Au collisions at RHIC.

Energy dependence of hyperon production in nucleus-nucleus collisions at SPS / Antinori, F., Bacon, P.A., 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., de Haas, A.P., de Rijke, P.C., Di Bari, D., Di Liberto, S., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 595:1-4(2004), pp. 68-74. [10.1016/j.physletb.2004.05.025]