Session J8 - Mini Symposium: Probing Dense Matter-Collective Flow.
MIXED session, Sunday morning, April 20
Room 10/11, Renaissance
We present azimuthal anisotropy measurements of global variables, transverse energy and charged multiplicity, with respect to the reaction plane. The first and second Fourier moments of the azimuthal distribution - identified as the sideward flow and in-plane expansion - are measured as functions of pseudo-rapidity and centrality. By utilizing both tracking and reaction plane information in the same event, the triple differential multiplicities of protons and charged pions with respect to the reaction plane are measured at forward rapidity. The mean transverse momentum in the direction of the reaction plane \langle p_x \rangle, which is a signature of sideward flow, will be shown as a function of rapidity for various centralities. Also shown is the transverse momentum dependence of the observed azimuthal anisotropy, quantified by Fourier analysis, which may help to reveal the dynamics of production. Comparison with predictions from cascade model calculations (RQMD, ARC) will be made. ^1 Supported in part by the U.S. Dept. of Energy ^2 Supported in part by the NSERC, Canada ^3 Supported in part by the CMPq, Brazil