The Thermal Model and the Transition from Baryonic to Mesonic Freeze-Out

Abstract

The present status of the thermal model is reviewed and the recently discovered sharp peak in the $K^{+}/{\pi }^{+}$ 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 Xi/pi and Omega/pi ratios occur at slightly different beam energies.

arXiv comment7 pages, 4 postscript figures, uses hiph-art.sty

References in corpus (4)

• Chemical and Thermal Freeze-Out Parameters from 1 to 200 A.GeV
• Unified Description of Freeze-Out Parameters in Relativistic Heavy Ion Collisions
• Report from NA49
• Transition from Baryonic to Mesonic Freeze-Out

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