781 articles – 3113 Notices  [english version]
 HAL : in2p3-00150200, version 1
 arXiv : hep-ex/0010045
 30. International Conference on High-Energy Physics ICHEP 2000, Osaka : Japon (2000)
 Centrality dependence of $K^+$ produced in Pb+Pb collisions at 158 GeV per nucleon
 NA52 Collaboration(s)
 (2000)
 The NA52 collaboration searches for a discontinuous behaviour of charged kaons produced in Pb+Pb collisions at 158 A GeV as a function of the impact parameter, which could reveal a hadron to quark-gluon plasma (QGP) phase transition. The K+ yield is found to grow proportional to the number of participating ('wounded') nucleons N, above N=100. Previous NA52 data agree with the above finding and show a discontinuous behaviour in the kaon centrality dependence near N=100, marking the onset of strangeness enhancement -over e.g. p+A data at the same \sqrt{s}- in a chemically equilibrated phase.
 Thème(s) : Physique/Physique des Hautes Energies - Expérience
 Lien vers le texte intégral : http://fr.arXiv.org/abs/hep-ex/0010045
 in2p3-00150200, version 1 http://hal.in2p3.fr/in2p3-00150200 oai:hal.in2p3.fr:in2p3-00150200 Contributeur : Nicole Berger <> Soumis le : Mardi 29 Mai 2007, 17:19:01 Dernière modification le : Mardi 29 Mai 2007, 20:17:36