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arXiv · 1107.1574

Validity of the Hadronic Freeze-Out Curve

F. Becattini·M. Bleicher·T. Kollegger·M. Mitrovski·T. Schuster·R. Stock
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Abstract

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-Ω, resulting in a shift in T and μ_B. We discuss the implications for the freeze-out curve.

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F. Becattini, M. Bleicher, T. Kollegger, M. Mitrovski, T. Schuster, R. Stock. 2011-07-08. Validity of the Hadronic Freeze-Out Curve. https://doi.org/10.1088/0954-3899%2F38%2F12%2F124075

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