``Pressure Equilibration'' in Ultrarelativistic Heavy Ion Collisions

Details ``Pressure Equilibration'' in Ultrarelativistic Heavy Ion Collisions ``Pressure Equilibration'' in Ultrarelativistic Heavy Ion Collisions

1997-01-22

arxiv.org/abs/nucl-th/9701045v1

GSI Scientific Report 1996 (ISSN 0174-0814) p.86

Physics

Nuclear Physics

Nuclear Theory

to be published in GSI annual scientific report 1997, psfig style file needed

Scientific paper

We study the time scale for pressure equilibration in heavy ion collisions at AGS energies within the three-fluid hydrodynamical model and a microscopic cascade model (UrQMD). We find that kinetic equilibrium is reached in both models after a time of 5 fm/c (center-of-mass time). Thus, observables which are sensitive to the early stage of the reaction differ considerably from the expectations within the instant thermalization scenario (one-fluid hydrodynamical model).

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