Thermal and hadrochemical equilibration in nucleus-nucleus collisions at the SPS
Braun-Munzinger, PDepartment of Physics, State University of New York at Stony Brook, Stony Brook, NY 11794 - 3800, USAStachel, J JDepartment of Physics, State University of New York at Stony Brook, Stony Brook, NY 11794 - 3800, USAWessels, J PDepartment of Physics, State University of New York at Stony Brook, Stony Brook, NY 11794 - 3800, USAXu, NDepartment of Physics, State University of New York at Stony Brook, Stony Brook, NY 11794 - 3800, USA
1995en
ABI
Abstract
The currently available set of hadron abundances at the SPS for central S+Au(W,Pb) collisions is compared to predictions from a scenario assuming local thermal and hadrochemical equilibrium. The data are consistent with a freeze-out temperature T = 160-170 MeV. Spectra are consistent with this temperature range and a moderate transverse expansion. The freeze-out points at the AGS and SPS are found to be close to the phase boundary between a hadron gas and an ideal quark-gluon phase.
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