Strangeness enhancement at midrapidity in Pb-Pb collisions at 158 A GeV/c:A comparison with VENUS and RQMD models

Authors
Antinori, F Bakke, H Beusch, W Bloodworth, IJ Caliandro, R Carrer, N Di Bari, D Di Liberto, S Elia, D Evans, D Fanebust, K Fini, RA Ftacnik, J Ghidini, B Grella, G Helstrup, H Holme, AK Huss, D Jacholkowski, A Jones, GT Kinson, JB Knudson, K Kralik, I Lenti, V Lietava, R Loconsole, RA Lovhoiden, G Manzari, V Mazzoni, MA Meddi, F Michalon, A Michalon-Mentzer, ME Morando, M Navach, F Norman, PI Pastircak, B Quercigh, E Romano, G Safarik, K Sandor, L Segato, G Staroba, P Thompson, M Thorsteinsen, TF Torrieri, GD Tveter, TS Urban, J Baillie, OV Virgili, T Votruba, MF Zavada, P
Citation
F. Antinori et al., Strangeness enhancement at midrapidity in Pb-Pb collisions at 158 A GeV/c:A comparison with VENUS and RQMD models, EUR PHY J C, 11(1), 1999, pp. 79-88
Citations number
19
Categorie Soggetti
Physics
Journal title
EUROPEAN PHYSICAL JOURNAL C
ISSN journal
14346044 → ACNP
Volume
11
Issue
1
Year of publication
1999
Pages
79 - 88
Database
ISI
SICI code
1434-6044(199911)11:1<79:SEAMIP>2.0.ZU;2-Q
Abstract
Recently the WA97 Collaboration has measured K-S(0), Lambda, Xi, Omega and negative particle yields and transverse mass spectra at central rapidity in Pb-Pb and p-Pb collisions at 158 A GeV/c. These results are compared with the predictions of two of the most widely used event generators for heavy-i on collisions: VENUS 4.12 and RQMD 2.3. Both models predict that enhancemen t, increase with the strangeness content of the particle. They fail, howeve r, to reproduce completely the measured values of yields at central rapidit y. In particular, for multistrange particles, VENUS fails: to reproduce bot h the p-Pb and the Pb-Pb data. while RQMD works for p-Pb collisions but see ms to be unable to reproduce the Omega data in Pb-Pb collisions. Moreover, the predicted behavior for strangeness production as: a function of the cen trality of the collision appears to be different from the observed behavior .