Systematic studies of elliptic flow measurements in Au + Au collisions at sqrt sNN = 200 GeV

Journal Article · Tue Sep 01 04:00:00 EDT 2009 · Physical Review, C (Nuclear Physics)

DOI:https://doi.org/10.1103/PhysRevC.80.024909· OSTI ID:1040154

Afanasiev, S

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: Brookhaven National Laboratory (BNL) Relativistic Heavy Ion Collider
• Sponsoring Organization: USDOE SC OFFICE OF SCIENCE (SC)
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 1040154
• Report Number(s): BNL--90436-2009-JA; KB0201021
• Journal Information: Physical Review, C (Nuclear Physics), Journal Name: Physical Review, C (Nuclear Physics) Journal Issue: 2 Vol. 80; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
FLUCTUATIONS
HADRONS
TRANSVERSE MOMENTUM
relativistic heavy ion collider