Abstract
We present new experimental data on directed flow in collisions of and at incident energies from to We study the centrality and system dependence of integral and differential directed flow for particles selected according to charge. All the features of the experimental data are compared with isospin quantum molecular dynamics (IQMD) model calculations in an attempt to extract information about the nuclear matter equation of state (EoS). We show that the combination of rapidity and transverse momentum analysis of directed flow allows to disentangle various parametrizations in the model. At a soft EoS with momentum dependent interactions is best suited to explain the experimental data in and but in the case of the model underpredicts flow for any EoS. At incident beam energy, none of the IQMD parametrizations studied here are able to consistently explain the experimental data.
- Received 28 June 2002
DOI:https://doi.org/10.1103/PhysRevC.67.034907
©2003 American Physical Society