2019 Impact factor 2.176
Hadrons and Nuclei
Eur. Phys. J. A 5, 157-172

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

A. Hombach - W. Cassing - S. Teis - U. Mosel

Institut für Theoretische Physik, Universität Giessen, D-35392 Giessen, Germany

Received: 16 December 1998 / Revised version: 9 March 1999 Communicated by V. Metag

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.

25.75.-q Relativistic heavy-ion collisions

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