TY  - INPR
A1  - Dumitru, Adrian Bogdan
A1  - Bass, Steffen A.
A1  - Bleicher, Marcus
A1  - Stöcker, Horst
A1  - Greiner, Walter
T1  - Direct emission of multiple strange baryons in ultrarelativistic heavy-ion collisions from the phase boundary
N2  - We discuss a model for the space-time evolution of ultrarelativistic heavy-ion collisions which employs relativistic hydrodynamics within one region of the forward light-cone, and microscopic transport theory (i.e. UrQMD) in the complement. Our initial condition consists of a quark-gluon plasma which expands hydrodynamically and hadronizes. After hadronization the solution eventually changes from expansion in local equilibrium to free streaming, as determined selfconsistently by the interaction rates between the hadrons and the local expansion rate. We show that in such a scenario the inverse slopes of the mT -spectra of multiple strange baryons ( Xi,Omega) are practically una ected by the purely hadronic stage of the reaction, while the flow of p's and Lambda's increases. Moreover, we find that the rather soft transverse expansion at RHIC energies (due to a first-order phase transition) is not washed out by strong rescattering in the hadronic stage. The earlier kinetic freeze-out as compared to SPS-energies results in similar inverse slopes (of the mT -spectra of the hadrons in the final state) at RHIC and SPS energies.
KW  - UrQMD
KW  - ultrarelativistische Kollision des schweren Ionen
KW  - mikroskopische Transporttheorie
KW  - microscopic transport theory
KW  - UrQMD
KW  - ultrarelativistic heavy-ion collision
Y1  - 2005
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/3119
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30-22771
ER  -