Transition from baryonic to mesonic freeze-out

dc.contributor.authorCleymans, J
dc.contributor.authorOeschler, H
dc.contributor.authorRedlich, K
dc.contributor.authorWheaton, S
dc.date.accessioned2018-01-17T06:53:06Z
dc.date.available2018-01-17T06:53:06Z
dc.date.issued2005
dc.date.updated2017-11-15T11:49:15Z
dc.description.abstractThe recently discovered sharp peak in the K+/π+ ratio in relativistic heavy-ion collisions is discussed in the framework of the statistical model. In this model a rapid change is expected as the hadronic gas undergoes a transition from a baryon-dominated to a meson-dominated gas. The transition occurs at a temperature T=140MeV and baryon chemical potential μB=410MeV corresponding to an incident energy of sNN=8.2GeV. The maximum in the Λ/π ratio is well reproduced by the statistical model, but the change in the K+/π+ ratio is much less pronounced than the one observed by the NA49 Collaboration. The calculated smooth increase of the K−/π− ratio and the shape of the Ξ−/π+ and Ω−/π+ ratios exhibiting maxima at different incident energies is consistent with the presently available experimental data. We conclude that the measured particle ratios with 20–30% deviations agree with a hadronic freeze-out scenario. These deviations seem to occur just in the transition from baryon-dominated to meson-dominated freeze-out.
dc.identifierhttp://dx.doi.org/10.1016/j.physletb.2005.03.074
dc.identifier.apacitationCleymans, J., Oeschler, H., Redlich, K., & Wheaton, S. (2005). Transition from baryonic to mesonic freeze-out. <i>Physics Letters B</i>, http://hdl.handle.net/11427/26832en_ZA
dc.identifier.chicagocitationCleymans, J, H Oeschler, K Redlich, and S Wheaton "Transition from baryonic to mesonic freeze-out." <i>Physics Letters B</i> (2005) http://hdl.handle.net/11427/26832en_ZA
dc.identifier.citationCleymans, J., Oeschler, H., Redlich, K., & Wheaton, S. (2005). Transition from baryonic to mesonic freeze-out. Physics Letters B, 615(1), 50-54.
dc.identifier.ris TY - Journal Article AU - Cleymans, J AU - Oeschler, H AU - Redlich, K AU - Wheaton, S AB - The recently discovered sharp peak in the K+/π+ ratio in relativistic heavy-ion collisions is discussed in the framework of the statistical model. In this model a rapid change is expected as the hadronic gas undergoes a transition from a baryon-dominated to a meson-dominated gas. The transition occurs at a temperature T=140MeV and baryon chemical potential μB=410MeV corresponding to an incident energy of sNN=8.2GeV. The maximum in the Λ/π ratio is well reproduced by the statistical model, but the change in the K+/π+ ratio is much less pronounced than the one observed by the NA49 Collaboration. The calculated smooth increase of the K−/π− ratio and the shape of the Ξ−/π+ and Ω−/π+ ratios exhibiting maxima at different incident energies is consistent with the presently available experimental data. We conclude that the measured particle ratios with 20–30% deviations agree with a hadronic freeze-out scenario. These deviations seem to occur just in the transition from baryon-dominated to meson-dominated freeze-out. DA - 2005 DB - OpenUCT DP - University of Cape Town J1 - Physics Letters B LK - https://open.uct.ac.za PB - University of Cape Town PY - 2005 T1 - Transition from baryonic to mesonic freeze-out TI - Transition from baryonic to mesonic freeze-out UR - http://hdl.handle.net/11427/26832 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/26832
dc.identifier.vancouvercitationCleymans J, Oeschler H, Redlich K, Wheaton S. Transition from baryonic to mesonic freeze-out. Physics Letters B. 2005; http://hdl.handle.net/11427/26832.en_ZA
dc.language.isoeng
dc.publisher.departmentDepartment of Physicsen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/
dc.sourcePhysics Letters B
dc.source.urihttps://www.journals.elsevier.com/physics-letters-b/
dc.titleTransition from baryonic to mesonic freeze-out
dc.typeJournal Article
uct.type.filetypeText
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