Enhancement of hyperon production at central rapidity in 158 A GeV/c
Pb-Pb collisions

Antinori, F
Bacon, P
Badala, A
Barbera, R
Belogianni, A
and Beusch, W
Bloodworth, IJ
Bombara, M
Bruno, GE
Bull,
SA
Caliandro, R
Campbell, M
Carena, W
Carrer, N and
Clarke, RF
Dainese, A
Di Bari, D
Di Liberto, S
Divia, R
and Elia, D
Evans, D
Feofilov, GA
Fini, RA
Ganoti, P and
Ghidini, B
Grella, G
Helstrup, H
Hetland, KF
Holme, AK
and Huss, D
Jacholkowski, A
Jones, GT
Jovanovic, P and
Jusko, A
Kamermans, R
Kinson, JB
Knudson, K
Kondratiev,
V
Kralik, I
Kravcakova, A
Kuijer, P
Lenti, V and
Lietava, R
Loconsole, RA
Lovhoiden, G
Manzari, V and
Mazzoni, MA
Meddi, F
Michalon-Mentzer, ME
Michalon, A and
Morando, M
Norman, PI
Palmeri, A
Pappalardo, GS and
Pastircak, B
Platt, RJ
Quercigh, E
Riggi, F
Rohrich, D
and Romano, G
Safarik, K
Sandor, L
Schillings, E
Segato,
G
Sene, M
Sene, R
Snoeys, W
Soramel, F and
Spyropoulou-Stassinaki, M
Staroba, P
Thompson, M
Turrisi, R
and Tveter, TS
Urban, J
van de Ven, P
Vande Vyvre, P and
Vascotto, A
Vik, T
Baillie, OV
Vinogradov, L
Virgili, T
and Votruba, MF
Vrlakova, J
Zavada, P
NA57 Collaborat

Enhancement of hyperon production at central rapidity in 158 A GeV/c Pb-Pb collisions

Authors: F Antinori Bacon, P Badala, A Barbera, R Belogianni, A and Beusch, W Bloodworth, IJ Bombara, M Bruno, GE Bull, SA Caliandro, R Campbell, M Carena, W Carrer, N and Clarke, RF Dainese, A Di Bari, D Di Liberto, S Divia, R and Elia, D Evans, D Feofilov, GA Fini, RA Ganoti, P and Ghidini, B Grella, G Helstrup, H Hetland, KF Holme, AK and Huss, D Jacholkowski, A Jones, GT Jovanovic, P and Jusko, A Kamermans, R Kinson, JB Knudson, K Kondratiev, V Kralik, I Kravcakova, A Kuijer, P Lenti, V and Lietava, R Loconsole, RA Lovhoiden, G Manzari, V and Mazzoni, MA Meddi, F Michalon-Mentzer, ME Michalon, A and Morando, M Norman, PI Palmeri, A Pappalardo, GS and Pastircak, B Platt, RJ Quercigh, E Riggi, F Rohrich, D and Romano, G Safarik, K Sandor, L Schillings, E Segato, G Sene, M Sene, R Snoeys, W Soramel, F and Spyropoulou-Stassinaki, M Staroba, P Thompson, M Turrisi, R and Tveter, TS Urban, J van de Ven, P Vande Vyvre, P and Vascotto, A Vik, T Baillie, OV Vinogradov, L Virgili, T and Votruba, MF Vrlakova, J Zavada, P NA57 Collaborat
Publication date: 1 January 2006
Publisher

Abstract

Results are presented on hyperon and antihyperon production in Pb-Pb, pPb and pBe collisions at 158 GeV/c per nucleon. Lambda, Xi and Omega yields have been measured at central rapidity and medium transverse momentum as functions of the centrality of the collision. Comparing the yields in Pb-Pb to those in pBe interactions, strangeness enhancement is observed. The enhancement increases with the centrality and with the strangeness content of the hyperons, reaching a factor of about 20 for the Omega in the central Pb-Pb collisions

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