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The Horn and the Thermal Model

J. Cleymans, H. Oeschler, K. Redlich, S. Wheaton

hep-pharXiv:hep-ph/0504065

Abstract

The recently discovered sharp peak in the K+/pi+ ratio in relativistic heavy-ion collisions is discussed in the framework of the thermal 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 = 140 MeV and baryon chemical potential muB = 410 MeV corresponding to an incident energy of 8.2 GeV.

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