Validity of the Hadronic Freeze-Out Curve
  We analyze hadro-chemical freeze-out in central Pb+Pb collisions at CERN SPS energies, employing the hybrid version of UrQMD which models hadronization 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 Hadronization 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. We discuss the implications for the freeze-out curve. 
F. Becattini (1), M. Bleicher (2), T. Kollegger (2), M. Mitrovski (3),   T. Schuster (2,4) and R. Stock (2,4) ((1) Universit...
hep-ph nucl-th