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Non-equilibrium fluid-dynamics in the early stage of ultrarelativistic heavy-ion collisions

✍ Scribed by J. Brachmann; A. Dumitru; J.A. Maruhn; H. Stöcker; W. Greiner; D.H. Rischke

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
1013 KB
Volume
619
Category
Article
ISSN
0375-9474

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✦ Synopsis

To describe ultrarelativistic heavy-ion collisions we construct a three-fluid hydrodynamical model. In contrast to one-fluid hydrodynamics, it accounts for the finite stopping power of nuclear matter, i.e, for non-equilibrium effects in the early stage of the reaction. Within this model, we study baryon dynamics in the BNL-AGS energy range. For the system Au+Au we find that kinetic equilibrium between projectile and target nucleons is established only after a time tceqm ~ 5 fm/c ~_ 2RAu/'Ycra. Observables that are sensitive to the early stage of the collision (like e.g. nucleon flow) therefore differ considerably from those calculated in the one-fluid model.

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