Systematic Studies of Elliptic Flow Measurements in Au+Au Collisions at s **(1/2) = 200 GeV
- University of Colorado, Boulder
- ORNL
- University of Tennessee, Knoxville (UTK) & Oak Ridge National Laboratory (ORNL)
- Oak Ridge National Laboratory (ORNL)
- University of Tennessee, Knoxville (UTK)
We present inclusive charged hadron elliptic flow (v{sub 2}) measured over the pseudorapidity range |{eta}| < 0.35 in Au + Au collisions at {radical}s{sub NN} = 200 GeV. Results for v{sub 2} are presented over a broad range of transverse momentum (p{sub T} = 0.2-8.0 GeV/c) and centrality (0-60%). To study nonflow effects that are correlations other than collective flow, as well as the fluctuations of v{sub 2}, we compare two different analysis methods: (1) the event-plane method from two independent subdetectors at forward (|{eta}| = 3.1-3.9) and beam (|{eta}| > 6.5) pseudorapidities and (2) the 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{sub T} and in centrality 0-40%. There is at most a 20% difference in the v{sub 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.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 988261
- Journal Information:
- Physical Review C, Vol. 80; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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Systematic Studies of Elliptic Flow Measurements in Au+Au Collisions at sqrt(s_NN) = 200 GeV
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