Hyperon Enhancement in the Dual Parton Model
Abstract
We review the two sources of hyperon enhancement in the dual parton model: strings originating from diquark-antidiquark pairs in the nucleon sea and net baryons containing two or three sea quarks with a yield controlled by the observed stopping. We show that adding final state interactions (including strangeness exchange reactions as well as the inverse reactions required by detailed balance) with a single averaged cross-section σ=0.2 mb, we can explain the observed hyperon enhancement in PbPb collisions at CERN SPS.
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