Publications [#245368] of Steffen A. Bass

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Papers Published
  1. Bass, SA; Dumitru, A; Bleicher, M; Bravina, L; Zabrodin, E; Stöcker, H; Greiner, W, Hadronic freeze-out following a first order hadronization phase transition in ultrarelativistic heavy-ion collisions, Physical Review C - Nuclear Physics, vol. 60 no. 2 (1999), pp. 219021-219025 [Gateway.cgi], [doi] .

    Abstract:
    We analyze the hadronic freeze-out in ultrarelativistic heavy-ion collisions at Relativistic Heavy Ion Collider (RHIC) in a transport approach that combines hydrodynamics for the early, dense, deconfined stage of the reaction with a microscopic nonequilibrium model for the later hadronic stage at which the hydrodynamic equilibrium assumptions are not valid. With this ansatz we are able to self-consistently calculate the freeze-out of the system and determine space-time hypersurfaces for individual hadron species. The space-time domains of the freeze-out for several hadron species are found to be actually four dimensional, and differ drastically for the individual hadrons species. Freeze-out radii distributions are similar in width for most hadron species, even though the Ω- is found to be emitted rather close to the phase boundary and shows the smallest freeze-out radii and times among all baryon species. The total lifetime of the system does not change by more than 10% when going from CERN Super Proton Synchrotron to RHIC energies.