Systematic Studies of Elliptic Flow Measurements in Au+Au Collisions at s**(1/2) = 200-GeV
May, 2009Citations per year
Abstract: (arXiv)
We present inclusive charged hadron elliptic flow v_2 measured over the pseudorapidity range |\eta| < 0.35 in Au+Au collisions at sqrt(s_NN) = 200 GeV. Results for v_2 are presented over a broad range of transverse momentum (p_T = 0.2-8.0 GeV/c) and centrality (0-60%). In order to study non-flow effects that are not correlated with the reaction plane, as well as the fluctuations of v_2, we compare two different analysis methods: (1) event plane method from two independent sub-detectors at forward (|\eta| = 3.1-3.9) and beam (|\eta| > 6.5) pseudorapidities and (2) two-particle cumulant method extracted using correlations between particles detected at midrapidity. The two event-plane results are consistent within systematic uncertainties over the measured p_T and in centrality 0-40%. There is at most 20% difference of the v_2 between the two event plane methods in peripheral (40-60%) collisions. The comparisons between the two-particle cumulant results and the standard event plane measurements are discussed.Note:
- 347 authors, 27 pages text, RevTeX-4, 24 figures, 10 tables. Submitted to Physical Review C
- 25.75.Ld
- heavy ion: scattering
- gold
- charged particle: elliptic flow
- rapidity dependence
- transverse momentum dependence
- impact parameter: dependence
- angular distribution: anisotropy
- angular correlation: two-particle
- cumulant expansion
References(51)
Figures(24)