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

Details Centrality dependence of K+ produced in Pb+Pb collisions at 158 GeV per nucleon Centrality dependence of K+ produced in Pb+Pb collisions at 158 GeV per nucleon

2000-10-20

arxiv.org/abs/hep-ex/0010053v1

J.Phys.G27:495-496,2001

Physics

High Energy Physics

High Energy Physics - Experiment

2 pages, 2 figures, Proceedings of the Vth International Conference on Strangeness in Quark Matter, 20-25 July 2000, Berkeley,

Scientific paper

10.1088/0954-3899/27/3/329

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.

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