Comparison of chemical freeze-out criteria in heavy-ion collisions

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dc.contributor.authorCleymans, J
dc.contributor.authorOeschler, H
dc.contributor.authorRedlich, K
dc.contributor.authorWheaton, S
dc.date.accessioned2021-10-08T07:11:28Z
dc.date.available2021-10-08T07:11:28Z
dc.date.issued2006
dc.description.abstractOne of the most remarkable results to emerge from heavy-ion collisions over the past two decades is the striking regularity shown by particle yields at all energies. This has led to several very successful proposals describing particle yields over a very wide range of beam energies, reaching from 1 A GeV up to 200 A GeV, using only one or two parameters. A systematic comparison of these proposals is presented here. The conditions of fixed energy per particle, baryon+anti-baryon density, normalized entropy density as well as percolation model are investigated. The results are compared with the most recent chemical freeze-out parameters obtained in the thermal-statistical analysis of particle yields. The sensitivity and dependence of the results on parameters is analyzed and discussed. It is shown that in the energy range above the top AGS energy, within present accuracies, all chemical freeze-out criteria give a fairly good description of the particle yields. However, the low energy heavy-ion data favor the constant energy per particle as a unified condition of chemical particle freeze-out. This condition also shows the weakest sensitivity on model assumptions and parameters.
dc.identifier.apacitationCleymans, J., Oeschler, H., Redlich, K., & Wheaton, S. (2006). Comparison of chemical freeze-out criteria in heavy-ion collisions. <i>Physical Review C - Nuclear Physics</i>, 73(3), 174 - 177. http://hdl.handle.net/11427/34616en_ZA
dc.identifier.chicagocitationCleymans, J, H Oeschler, K Redlich, and S Wheaton "Comparison of chemical freeze-out criteria in heavy-ion collisions." <i>Physical Review C - Nuclear Physics</i> 73, 3. (2006): 174 - 177. http://hdl.handle.net/11427/34616en_ZA
dc.identifier.citationCleymans, J., Oeschler, H., Redlich, K. & Wheaton, S. 2006. Comparison of chemical freeze-out criteria in heavy-ion collisions. <i>Physical Review C - Nuclear Physics.</i> 73(3):174 - 177. http://hdl.handle.net/11427/34616en_ZA
dc.identifier.issn0556-2813
dc.identifier.issn1089-490X
dc.identifier.ris TY - Journal Article AU - Cleymans, J AU - Oeschler, H AU - Redlich, K AU - Wheaton, S AB - One of the most remarkable results to emerge from heavy-ion collisions over the past two decades is the striking regularity shown by particle yields at all energies. This has led to several very successful proposals describing particle yields over a very wide range of beam energies, reaching from 1 A GeV up to 200 A GeV, using only one or two parameters. A systematic comparison of these proposals is presented here. The conditions of fixed energy per particle, baryon+anti-baryon density, normalized entropy density as well as percolation model are investigated. The results are compared with the most recent chemical freeze-out parameters obtained in the thermal-statistical analysis of particle yields. The sensitivity and dependence of the results on parameters is analyzed and discussed. It is shown that in the energy range above the top AGS energy, within present accuracies, all chemical freeze-out criteria give a fairly good description of the particle yields. However, the low energy heavy-ion data favor the constant energy per particle as a unified condition of chemical particle freeze-out. This condition also shows the weakest sensitivity on model assumptions and parameters. DA - 2006 DB - OpenUCT DP - University of Cape Town IS - 3 J1 - Physical Review C - Nuclear Physics LK - https://open.uct.ac.za PY - 2006 SM - 0556-2813 SM - 1089-490X T1 - Comparison of chemical freeze-out criteria in heavy-ion collisions TI - Comparison of chemical freeze-out criteria in heavy-ion collisions UR - http://hdl.handle.net/11427/34616 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/34616
dc.identifier.vancouvercitationCleymans J, Oeschler H, Redlich K, Wheaton S. Comparison of chemical freeze-out criteria in heavy-ion collisions. Physical Review C - Nuclear Physics. 2006;73(3):174 - 177. http://hdl.handle.net/11427/34616.en_ZA
dc.language.isoeng
dc.publisher.departmentDepartment of Physics
dc.publisher.facultyFaculty of Science
dc.sourcePhysical Review C - Nuclear Physics
dc.source.journalissue3
dc.source.journalvolume73
dc.source.pagination174 - 177
dc.source.urihttps://dx.doi.org/10.1103/PhysRevC.73.034905
dc.subject.othernuclear physics and radiation physics
dc.subject.otherantibaryons
dc.subject.othercomparative evaluations
dc.subject.otherdensity
dc.subject.otherentropy
dc.subject.othergev range
dc.subject.otherheavy ion reactions
dc.subject.othernuclear reaction yield
dc.subject.otherthermodynamic model
dc.titleComparison of chemical freeze-out criteria in heavy-ion collisions
dc.typeJournal Article
uct.type.publicationResearch
uct.type.resourceJournal Article
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