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

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.

9 pages, 4 figures

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Cited by in corpus (18)

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• Multiplicity dependence of light-flavor hadron production in pp collisions at $\sqrt{s}$ = 7 TeV
• Phi decay: a relevant source for K- production at SIS energies?
• Strange hadron production in Au+Au collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}$ = 7.7, 11.5, 19.6, 27, and 39 GeV
• Production of K+ and of K- Mesons in Heavy-Ion Collisions from 0.6 to 2.0 AGeV Incident Energy
• Transport Theories for Heavy Ion Collisions in the 1 AGeV Regime
• Statistical production of antikaon nuclear bound states in heavy ion collisions
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• Thermalization at lowest energies? A view from a transport model
• Hadron Production in Heavy Ion Collisions
• Energy Dependence of Strangeness Production in Heavy-ion Collision