Analysis of flow effects in relativistic heavy-ion collisions within the CBUU approach

Details Analysis of flow effects in relativistic heavy-ion collisions within the CBUU approach Analysis of flow effects in relativistic heavy-ion collisions within the CBUU approach

1998-12-18

arxiv.org/abs/nucl-th/9812050v1

Eur.Phys.J. A5 (1999) 157-172

Physics

Nuclear Physics

Nuclear Theory

25 pages, 17 figures, submitted to Europ. Phys. J. A

Scientific paper

We study flow phenomena in relativistic heavy-ion collisions, both in transverse and radial direction, in comparison to experimental data. The collective dynamics of the nucleus-nucleus collision is described within a transport model of the coupled channel BUU type (CBUU). This recently developed version includes all nucleonic resonances up to 1.95 GeV in mass and mean-field potentials both of the Skyrme and momentum dependent MDYI type. We find that heavy resonances play an important role in the description of transverse flow above 1 AGeV incident energy. For radial flow we analyse reaction times and equilibration and extract the parameters $T$ and $\beta$ for temperature and collective flow velocity within different prescriptions. Furthermore, we apply a coalescence model for fragment production and check the mass dependence of the flow signals.

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