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The thermal model and the transition from baryonic to mesonic freeze-out |
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| Authors: | J Cleymans H Oeschler K Redlich S Wheaton |
| Institution: | (1) UCT-CERN Research Centre and Department of Physics, University of Cape Town, 7701 Rondebosch, South Africa;(2) Darmstadt University of Technology, D-64289 Darmstadt, Germany;(3) Institute of Theoretical Physics, University of Wrocław, Pl. Maksa Borna 9, 50-204 Wrocław, Poland;(4) CERN TH, CH 1211 Geneva 23, Switzerland |
| Abstract: | The present status of the thermal model is reviewed and the recently discovered sharp peak in the K +/π+ ratio is discussed in this framework. It is shown that the rapid change is related to a transition from a baryon-dominated hadronic gas to a meson-dominated one. Further experimental tests to clarify the nature of the transition are discussed. In the thermal model the corresponding maxima in the Ξ/π and Ω/π ratios occur at slightly different beam energies. |
| Keywords: | 24 10 Pa Thermal and statistical models 25 75 Dw Particle and resonance production 12 38 Mh Quark-gluon plasma |
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