2 research outputs found
Thermal Equilibration and Expansion in Nucleus-Nucleus Collision at the AGS
The rather complete data set of hadron yields from central Si + A collisions
at the Brookhaven AGS is used to test whether the system at freeze-out is in
thermal and hadro-chemical equilibrium. Rapidity and transverse momentum
distributions are discussed with regards to the information they provide on
hydrodynamic flow.Comment: 11 pages + 2 uuencoded figure
Thermal and Hadrochemical Equilibration in Nucleus-Nucleus Collisions at the SPS
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.Comment: 14 pages + 3 figures. Paper replaced with version accepted for
publication in Phys. Lett.