Hadronization and Hadronic Freeze-Out in Relativistic Nuclear Collisions

Details Hadronization and Hadronic Freeze-Out in Relativistic Nuclear Collisions Hadronization and Hadronic Freeze-Out in Relativistic Nuclear Collisions

2012-01-30

arxiv.org/abs/1201.6349v2

Phys. Rev. C 85, 044921 (2012)

Physics

Nuclear Physics

Nuclear Theory

9 pages, 11 figures

Scientific paper

10.1103/PhysRevC.85.044921

We analyze hadrochemical freeze-out in central Pb+Pb collisions at CERN SPS energies, employing the hybrid version of the Ultrarelativistic Quantum Molecular Dynamics model, which describes the transition from a hydrodynamic stage to hadrons by the Cooper-Frye mechanism, and matches to a final hadron-resonance cascade. We fit the results both before and after the cascade stage using the Statistical Model, to assess the effect of the cascade phase. We observe a strong effect on antibaryon yields except anti-Omega, resulting in a shift in T and mu_B of the freeze-out curve. We discuss indications of a similar effect in SPS and RHIC data, and propose a method to recover the bulk hadron freeze-out conditions.

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