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
Abstract
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 
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.
PACS
25.75.-q Relativistic heavy-ion collisions
Copyright Springer-Verlag
