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On the chemical equilibration of strangeness-exchange reaction in heavy-ion collisions

J. Cleymans·A. Foerster·H. Oeschler·K. Redlich·F. Uhlig
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Abstract

The strangeness-exchange reaction pi + Y -> K- + N is shown to be the dynamical origin of chemical equilibration for K- production in heavy-ion collisions up to beam energies of 10 A GeV. The hyperons occurring in this process are produced associately with K+ in baryon-baryon and meson-baryon interactions. This connection is demonstrated by the ratio K-/K+ which does not vary with centrality and shows a linear correlation with the yield of pions per participant. At incident energies above AGS this correlation no longer holds due to the change in the production mechanism of kaons.

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J. Cleymans, A. Foerster, H. Oeschler, K. Redlich, F. Uhlig. 2004-06-12. On the chemical equilibration of strangeness-exchange reaction in heavy-ion collisions. https://doi.org/10.1016/j.physletb.2004.09.078

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