Directed Flow in 158 A GeV Pb + Pb Collisions
arXiv:nucl-ex/9807004
Abstract
The directed flow of protons and positive pions have been studied in 158 A GeV Pb + Pb collisions. A directed flow analysis of the rapidity dependence of the average transverse momentum projected onto the reaction plane is presented for semi-central collisions with impact parameters of approximately 8 fm, where the flow effect is largest. The magnitude of the directed flow is found to be significantly smaller than observed at AGS energies and than RQMD model predictions.
5 pages, Latex, including 3 eps figures, submitted to Phys.Rev.Lett. Resubmitted with revised text and figures