1201.6349 (Francesco Becattini et al.)

Hadronization and Hadronic Freeze-Out in Relativistic Nuclear Collisions    [PDF]

Francesco Becattini, Marcus Bleicher, Thorsten Kollegger, Michael Mitrovski, Tim Schuster, Reinhard Stock

We analyze hadrochemical freeze-out in central Pb+Pb collisions at CERN SPS
energies, employing the hybrid version of UrQMD which models 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.

View original: http://arxiv.org/abs/1201.6349