Collective effects in microscopic transport models

Details Collective effects in microscopic transport models Collective effects in microscopic transport models

2002-09-06

arxiv.org/abs/nucl-th/0209021v1

Nucl.Phys. A715 (2003) 75-84

Physics

Nuclear Physics

Nuclear Theory

10 pages, 8 figures; invited talk at the 16th Int. Conf. on Ultra-Relativistic Nucleus-Nucleus Collisions, QM2002, Nantes, Fra

Scientific paper

10.1016/S0375-9474(02)01415-X

We give a reminder on the major inputs of microscopic hadronic transport models and on the physics aims when describing various aspects of relativistic heavy ion collisions at SPS energies. We then first stress that the situation of particle ratios being reproduced by a statistical description does not necessarily mean a clear hint for the existence of a fully isotropic momentum distribution at hadrochemical freeze-out. Second, a short discussion on the status of strangeness production is given. Third we demonstrate the importance of a new collective mechanism for producing (strange) antibaryons within a hadronic description, which guarantees sufficiently fast chemical equilibration.

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