Flow Measurements via Two-Particle Azimuthal Correlations in Au+Au Collisions at sqrt[sNN]=130 GeV

Two-particle azimuthal correlation functions are presented for charged hadronsproduced in Au+Au collisions at the Relativistic Heavy Ion Collider(sqrt[sNN]=130  GeV). The measurements permit determination of elliptic flowwithout event-by-event estimation of the reaction plane. The extracted elliptic flowvalues (v2) show significant sensitivity to both the collision centrality and the transverse momenta of emitted hadrons, suggesting rapid thermalization and relatively strong velocity fields. When scaled by the eccentricity of the collision zonee, the scaled elliptic flowshows little or no dependence on centrality for charged hadronswith relatively low pT. A breakdown of this e scaling is observed for charged hadronswith pT >1.0  GeV/c.