Global observables and secondary interactions in central Au+Au reactions at s=200 AGeV
M. Bleicher, S. A. Bass, L. V. Bravina, W. Greiner, S. Soff, H. Stöcker, N. Xu, E. E. Zabrodin
Abstract
The Ultra-relativistic Quantum Molecular Dynamics model (UrQMD) is used to study global observables in central reactions of Au+Au at s=200 AGeV (RHIC). Strong stopping governed by massive particle production is predicted if secondary interactions are taken into account. The underlying string dynamics and the early hadronic decoupling implies only small transverse expansion rates. However, rescattering with mesons is found to act as a source of pressure leading to additional flow of baryons and kaons, while cooling down pions.
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