TY  - INPR
A1  - Gorenstein, Mark I.
A1  - Stöcker, Horst
A1  - Yen, Granddon D.
A1  - Yang, Shin Nan
A1  - Greiner, Walter
T1  - Chemical freezeout in relativistic A+A collisions: is it close to the QGP?
N2  - Preliminary experimental data for particle number ratios in the collisions of Au+Au at the BNL AGS (11A GeV/c) and Pb+Pb at the CERN SPS (160A GeV/c) are analyzed in a thermodynamically consistent hadron gas model with excluded volume. Large values of temperature, T = 140 185 MeV, and baryonic chemical potential, µb = 590 270 MeV, close to the boundary of the quark-gluon plasma phase are found from fitting the data. This seems to indicate that the energy density at the chemical freezeout is tremendous which would be indeed the case for the point-like hadrons. However, a self-consistent treatment of the van der Waals excluded volume reveals much smaller energy densities which are very far below a lowest limit estimate of the quark-gluon plasma energy density. PACS number(s): 25.75.-q, 24.10.Pa
KW  - chemisches Ausfrieren
KW  - van der Waals
KW  - Quark-Gluon-Plasma
KW  - Zustandsgleichung
KW  - chemical freezeout
KW  - van der Waals
KW  - quark-gluon plasma
KW  - equation of state
Y1  - 2005
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/3066
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30-23319
ER  -