# Centrality dependence of $K^+$ produced in Pb+Pb collisions at 158 GeV per nucleon

Abstract : 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.
Document type :
Conference papers

http://hal.in2p3.fr/in2p3-00150200
Contributor : Claudine Bombar <>
Submitted on : Tuesday, May 29, 2007 - 5:19:01 PM
Last modification on : Friday, November 6, 2020 - 3:29:55 AM

### Citation

R. Arsenescu, H. P. Beck, K. Borer, S. Kabana, R. Klingenberg, et al.. Centrality dependence of $K^+$ produced in Pb+Pb collisions at 158 GeV per nucleon. 30. International Conference on High-Energy Physics ICHEP 2000, Jul 2000, Osaka, Japan. ⟨in2p3-00150200⟩

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