Chemical Equilibration of Antihyperons

Details Chemical Equilibration of Antihyperons Chemical Equilibration of Antihyperons

2002-02-15

arxiv.org/abs/nucl-th/0202052v2

Physics

Nuclear Physics

Nuclear Theory

revised version for some typos and two references; 6 pages, 4 figures; contribution to the Int. Workshop XXX on Gross Properti

Scientific paper

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 \approx 150-160 $ MeV. The proposed picture supports dynamically the popular chemical freeze-out parameters extracted within thermal models.

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