TY  - INPR
A1  - Dumitru, Adrian Bogdan
A1  - Brachmann, Jörg
A1  - Bleicher, Marcus
A1  - Maruhn, Joachim
A1  - Stöcker, Horst
A1  - Greiner, Walter
T1  - Probes for the early reaction dynamics of heavy ion collisions at AGS and SPS
N2  - We discuss the early evolution of ultrarelativistic heavy-ion collisions within a multi- fluid dynamical model. In particular, we show that due to the finite mean-free path of the particles compression shock waves are smeared out considerably as compared to the one-fluid limit. Also, the maximal energy density of the baryons is much lower. We discuss the time scale of kinetic equilibration of the baryons in the central region and its relevance for directed flow. Finally, thermal emission of direct photons from the fluid of produced particles is calculated within the three-fluid model and two other simple expansion models. It is shown that the transverse momentum and rapidity spectra of photons give clue to the cooling law and the early rapidity distribution of the photon source.
KW  - Kollisionen schwerer Ionen
KW  - SPS
KW  - AGS
KW  - heavy-ion collisions
KW  - SPS
KW  - AGS
Y1  - 2006
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/3022
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30-23852
ER  -