Chemical Equilibration of Antihyperons
C. Greiner
Abstract
Rapid chemical equilibration of antihyperons by means of the interplay between strong annihilation on baryons and the corresponding backreactions of multi-mesonic (fusion-type) processes in the later, hadronic stage of an ultrarelativistic heavy ion collision will be discussed. Explicit rate calculations for a dynamical setup are presented. At maximum SPS energies yields of each antihyperon specie are obtained which are consistent with chemical saturated populations of T ≈ 150-160 MeV. The proposed picture supports dynamically the popular chemical freeze-out parameters extracted within thermal models.
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