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

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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 partic...

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Detalles Bibliográficos
Autores principales: Kabana, Sonja, Ambrosini, G., Arsenescu, R., Baglin, C., Beck, H.P., Borer, K., Bussière, A., Elsener, K., Gorodetzky, Ph, Guillaud, J.P., Hess, P., Klingenberg, R., Lehmann, G., Lindén, T., Lohmann, K.D., Mommsen, R., Moser, U., Pretzl, K., Schacher, J., Stoffel, F., Spiwoks, R., Tuominiemi, J., Weber, M.
Lenguaje:eng
Publicado: 2001
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1088/0954-3899/27/3/329
http://cds.cern.ch/record/471074
Descripción
Sumario: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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