Collective phenomena at the EOS TPC

Based on a preliminary subsample of Au + Au collisions in the EOS time projection chamber at the Bevalac, the authors study sideward flow as a function of bombarding energy between 0.25A GeV and 1.2A GeV. They focus on the increase in in-plane transverse momentum per nucleon with fragment mass, and address the possibility of interpreting this as a coalescence effect. They also find event shapes to be close to spherical in the most central collisions, independent of bombarding energy and fragment mass up to {sup 4}He.