Third harmonic flow of charged particles in Au plus Au collisions at root s(NN)=200 GeV

We report measurements of the third harmonic coefficient of the azimuthal anisotropy, upsilon(3), known as triangular flow. The analysis is for charged particles in Au + Au collisions at root s(NN) = 200 GeV, based on data from the STAR experiment at the BNL Relativistic Heavy Ion Collider. Two-particle correlations as a function of their pseudorapidityseparation are fit with narrow and wide Gaussians. Measurementsof triangular flow are extracted from the wide Gaussian, from two-particle cumulants with a pseudorapiditygap, and also from event plane analysis methods with a large pseudorapiditygap between the particles and the event plane. These results are reported as a function of transverse momentum and centrality. A large dependence on the pseudorapiditygap is found. Results are compared with other experiments and model calculations.