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25 April 2024

» arxiv » hep-ex/0010045

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Centrality dependence of K+ produced in Pb+Pb collisions at 158 GeV per nucleon
NA52 collaboration: R. Arsenescu ; H. P. Beck ; K. Borer ; S. Kabana ; R. Klingenberg ; G. Lehmann ; R. Mommsen ; U. Moser ; K. Pretzl ; J. Schacher ; R. Spiwoks ; M. Weber ; K. Elsener ; K. D. Lohmann ; C. Baglin ; A. Bussiere ; J. P. Guillaud ; T. Lindén ; J. Tuominiemi ; Ph. Gorodetzky ;
Date:	18 Oct 2000
Subject:	hep-ex
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.
Source:	arXiv, hep-ex/0010045
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