The analysis of particle multiplicities in Pb+Pb collisions at CERN SPS within hadron gas models

The preliminary data on total hadron multiplicities measured by NA49 Collaboration in central Pb+Pb collisions at 158A GeV/c are analyzed. The ideal hadron gas model fails to give a reasonable explanation to the Pb+Pb data sets. We study the possible effects of strangeness suppression because of inc...

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Detalles Bibliográficos
Autores principales: Yen, Granddon D., Gorenstein, Mark I.
Lenguaje:eng
Publicado: 1999
Materias:
Nuclear Physics - Theory
Acceso en línea:https://dx.doi.org/10.1103/PhysRevC.59.2788
http://cds.cern.ch/record/361935
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author Yen, Granddon D.
Gorenstein, Mark I.
author_facet Yen, Granddon D.
Gorenstein, Mark I.
author_sort Yen, Granddon D.
collection CERN
description The preliminary data on total hadron multiplicities measured by NA49 Collaboration in central Pb+Pb collisions at 158A GeV/c are analyzed. The ideal hadron gas model fails to give a reasonable explanation to the Pb+Pb data sets. We study the possible effects of strangeness suppression because of incomplete chemical equilibrium and pion enhancement due to different hard-core repulsion for pions and other hadrons. Each of these two modifications significantly improves the results. The combined effect of these two mechanisms results in an extremely good agreement with the data. An interpretation of the obtained results in terms of the possible quark-gluon plasma formation at the early stage of the collision is also discussed.
id cern-361935
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1999
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spelling cern-3619352023-03-14T18:44:39Zdoi:10.1103/PhysRevC.59.2788http://cds.cern.ch/record/361935engYen, Granddon D.Gorenstein, Mark I.The analysis of particle multiplicities in Pb+Pb collisions at CERN SPS within hadron gas modelsNuclear Physics - TheoryThe preliminary data on total hadron multiplicities measured by NA49 Collaboration in central Pb+Pb collisions at 158A GeV/c are analyzed. The ideal hadron gas model fails to give a reasonable explanation to the Pb+Pb data sets. We study the possible effects of strangeness suppression because of incomplete chemical equilibrium and pion enhancement due to different hard-core repulsion for pions and other hadrons. Each of these two modifications significantly improves the results. The combined effect of these two mechanisms results in an extremely good agreement with the data. An interpretation of the obtained results in terms of the possible quark-gluon plasma formation at the early stage of the collision is also discussed.The preliminary data on hadron multiplicities measured in central Pb+Pb collisions at 158A GeV/c are analyzed. The ideal hadron gas model fails to give a reasonable explanation to the Pb+Pb data sets. We study the possible effects of pion enhancement due to different hard-core repulsion for pions and other hadrons and strangeness suppression because of incomplete chemical equilibrium. Each of these two modifications improves the results. The combined effect of these two mechanisms leads to an extremely good agreement with the data. An interpretation of the obtained results in terms of the possible quark-gluon plasma formation at the early stage of the collision is also discussed.nucl-th/9808012oai:cds.cern.ch:3619351999
spellingShingle Nuclear Physics - Theory
Yen, Granddon D.
Gorenstein, Mark I.
The analysis of particle multiplicities in Pb+Pb collisions at CERN SPS within hadron gas models
title The analysis of particle multiplicities in Pb+Pb collisions at CERN SPS within hadron gas models
title_full The analysis of particle multiplicities in Pb+Pb collisions at CERN SPS within hadron gas models
title_fullStr The analysis of particle multiplicities in Pb+Pb collisions at CERN SPS within hadron gas models
title_full_unstemmed The analysis of particle multiplicities in Pb+Pb collisions at CERN SPS within hadron gas models
title_short The analysis of particle multiplicities in Pb+Pb collisions at CERN SPS within hadron gas models
title_sort analysis of particle multiplicities in pb+pb collisions at cern sps within hadron gas models
topic Nuclear Physics - Theory
url https://dx.doi.org/10.1103/PhysRevC.59.2788
http://cds.cern.ch/record/361935
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