Journal
PHYSICAL REVIEW C
Volume 85, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.85.044921
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Funding
- Deutsche Forschungsgemeinschaft (DFG)
- Hessian LOEWE initiative through HIC for FAIR
- Istituto Nazionale di Fisica Nucleare (INFN)
- Helmholtz Research School on Quark Matter Studies
- Brookhaven Science Associates, LLC [DE-AC02-98CH1-8886]
- US Department of Energy
- GSI
- German Federal Ministry of Education and Research (BMBF)
- DESY
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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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