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

  • 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 nonequilibrium e ects 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 teq CM H 5 fm/c C 2RAu/³CM. Observables which are sensitive to the early stage of the collision (like e.g. nucleon flow) therefore di er considerably from those calculated in the one-fluid model.

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Author:Jörg BrachmannGND, Adrian Bogdan DumitruORCiDGND, Joachim MaruhnORCiDGND, Horst StöckerORCiDGND, Walter GreinerGND, Dirk-Hermann RischkeORCiDGND
Document Type:Preprint
Date of Publication (online):2006/01/17
Year of first Publication:1997
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2006/01/17
Tag:Kollisionen schwerer Ionen; Zustandsgleichung; hydrodynamisches Modell
equation of state; heavy ion colliders; hydrodynamical model
Source:Report-no: UFTP-435/1997, Duke-TH-97-140, Nucl.Phys.A619:391-412,1997. [nucl-th/9703032]
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht