Abstract
We analyze hadrochemical freeze-out in central collisions of heavy nuclei at AGS, SPS and LHC energies. Employing the UrQMD hybrid transport model we study the effects of the final hadron/resonance expansion phase on the hadron multiplicities established at hadronization. The bulk meson yields freeze out directly at hadronization and essentially survive the expansion, whereas the baryon-antibaryon sector is subject to annihilation and regeneration processes, causing significant alterations. We quantify the latter changes by survival factors which are then applied to modify the statistical model predictions for the data. The modified SHM analysis recovers the hadronization points, which are compared to the recent lattice QCD predictions of the parton-hadron transition line in the QCD phase diagram, at finite baryochemical potential.
Published Version
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