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Title: Systematic Studies of Elliptic Flow Measurements in Au+Au Collisions at s **(1/2) = 200 GeV

Abstract

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.

Authors:
 [1];  [2];  [2];  [3];  [4];  [2];  [2];  [5];  [2]
  1. University of Colorado, Boulder
  2. ORNL
  3. University of Tennessee, Knoxville (UTK) & Oak Ridge National Laboratory (ORNL)
  4. Oak Ridge National Laboratory (ORNL)
  5. University of Tennessee, Knoxville (UTK)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
988261
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 80; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; FLUCTUATIONS; HADRONS; TRANSVERSE MOMENTUM

Citation Formats

Adare, A, Awes, Terry C, Cianciolo, Vince, Efremenko, Yuri, Enokizono, Akitomo, Read, Jr, Kenneth F, Silvermyr, David O, Sorensen, Soren P, Stankus, Paul W, and PHENIX, Collaboration. Systematic Studies of Elliptic Flow Measurements in Au+Au Collisions at s **(1/2) = 200 GeV. United States: N. p., 2009. Web.
Adare, A, Awes, Terry C, Cianciolo, Vince, Efremenko, Yuri, Enokizono, Akitomo, Read, Jr, Kenneth F, Silvermyr, David O, Sorensen, Soren P, Stankus, Paul W, & PHENIX, Collaboration. Systematic Studies of Elliptic Flow Measurements in Au+Au Collisions at s **(1/2) = 200 GeV. United States.
Adare, A, Awes, Terry C, Cianciolo, Vince, Efremenko, Yuri, Enokizono, Akitomo, Read, Jr, Kenneth F, Silvermyr, David O, Sorensen, Soren P, Stankus, Paul W, and PHENIX, Collaboration. Tue . "Systematic Studies of Elliptic Flow Measurements in Au+Au Collisions at s **(1/2) = 200 GeV". United States.
@article{osti_988261,
title = {Systematic Studies of Elliptic Flow Measurements in Au+Au Collisions at s **(1/2) = 200 GeV},
author = {Adare, A and Awes, Terry C and Cianciolo, Vince and Efremenko, Yuri and Enokizono, Akitomo and Read, Jr, Kenneth F and Silvermyr, David O and Sorensen, Soren P and Stankus, Paul W and PHENIX, Collaboration},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/988261}, journal = {Physical Review C},
issn = {0556-2813},
number = ,
volume = 80,
place = {United States},
year = {2009},
month = {9}
}