Kinetic Energy Flow inNb(400A MeV)+Nb: Evidence for Hydrodynamic Compression of Nuclear Matter

Abstract
A kinetic-energy—flow analysis of multiplicity-selected collisions of Nb93(Elab=400A MeV)+Nb93 is performed on the basis of the nuclear fluid dynamical model. The effects of finite particle numbers on the flow tensor are explicitly taken into account. Strong sidewards peaks are predicted in dNdcosθF, the distribution of event by event flow angles. This is in qualitative agreement with recent data from the "Plastic Ball" electronic detection system. Cascade simulations fail to reproduce the data.