HAL : in2p3-00102878, version 1
 8th International Conference of Strangeness in Quark Matter, Los Angeles : États-Unis
 Results from NA57
 NA57 Collaboration(s)
 (2006)
 The NA57 experiment has measured strange baryon and antibaryon production in Pb-Pb collisions at 40 A GeV/c and 158 A GeV/c beam momenta. Expansion dynamics has been investigated; transverse dynamics using blast wave fits, longitudinal dynamics obtained from rapidity distributions. HBT analysis gives results compatible with those obtained by the other methods. Similar values are observed for the transverse and longitudinal ow parameters. Particles carrying all levels of strangeness have been studied. Enhancement factors increase with the strangeness content of the particle, reaching above 20 for $\Omega$s in central collisions. Enhancement values are strikingly similar for SPS and RHIC energies. Centralto-peripheral nuclear modication factors have been measured. The baryon/meson pattern displays similarities with that observed at RHIC
 Thème(s) : Physique/Physique Nucléaire ExpérimentalePhysique/Physique des Hautes Energies - Expérience
Liste des fichiers attachés à ce document :
 PDF
 sqm2006_na57.pdf(202.4 KB)
 in2p3-00102878, version 1 http://hal.in2p3.fr/in2p3-00102878 oai:hal.in2p3.fr:in2p3-00102878 Contributeur : Yvette Heyd <> Soumis le : Mercredi 4 Octobre 2006, 15:15:41 Dernière modification le : Jeudi 15 Mars 2007, 15:18:12