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Title: Systematic studies of elliptic flow measurements in Au+Au collisions at {radical}(s{sub NN})=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]
  1. Joint Institute for Nuclear Research, Moscow Region, RU-141980 Dubna (Russian Federation)
  2. Columbia University, New York, New York 10027 and Nevis Laboratories, Irvington, New York 10533 (United States)
Publication Date:
OSTI Identifier:
21290078
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 80; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevC.80.024909; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ATOM-ATOM COLLISIONS; BEAMS; CHARGED PARTICLES; COLLISIONS; COMPARATIVE EVALUATIONS; CORRELATIONS; FLUCTUATIONS; GEV RANGE 100-1000; GOLD; HADRONS; PARTICLE RAPIDITY; TRANSVERSE MOMENTUM

Citation Formats

Afanasiev, S, Isupov, A, Litvinenko, A, Malakhov, A, Peresedov, V, Rukoyatkin, P, Zolin, L, Aidala, C, Batsouli, S, Bjorndal, M T, Chi, C Y, Chiu, M, Cole, B A, D'Enterria, D, Frantz, J E, Jia, J, Jin, J, Winter, D, Zajc, W A, and Zhang, C. Systematic studies of elliptic flow measurements in Au+Au collisions at {radical}(s{sub NN})=200 GeV. United States: N. p., 2009. Web. doi:10.1103/PHYSREVC.80.024909.
Afanasiev, S, Isupov, A, Litvinenko, A, Malakhov, A, Peresedov, V, Rukoyatkin, P, Zolin, L, Aidala, C, Batsouli, S, Bjorndal, M T, Chi, C Y, Chiu, M, Cole, B A, D'Enterria, D, Frantz, J E, Jia, J, Jin, J, Winter, D, Zajc, W A, & Zhang, C. Systematic studies of elliptic flow measurements in Au+Au collisions at {radical}(s{sub NN})=200 GeV. United States. https://doi.org/10.1103/PHYSREVC.80.024909
Afanasiev, S, Isupov, A, Litvinenko, A, Malakhov, A, Peresedov, V, Rukoyatkin, P, Zolin, L, Aidala, C, Batsouli, S, Bjorndal, M T, Chi, C Y, Chiu, M, Cole, B A, D'Enterria, D, Frantz, J E, Jia, J, Jin, J, Winter, D, Zajc, W A, and Zhang, C. Sat . "Systematic studies of elliptic flow measurements in Au+Au collisions at {radical}(s{sub NN})=200 GeV". United States. https://doi.org/10.1103/PHYSREVC.80.024909.
@article{osti_21290078,
title = {Systematic studies of elliptic flow measurements in Au+Au collisions at {radical}(s{sub NN})=200 GeV},
author = {Afanasiev, S and Isupov, A and Litvinenko, A and Malakhov, A and Peresedov, V and Rukoyatkin, P and Zolin, L and Aidala, C and Batsouli, S and Bjorndal, M T and Chi, C Y and Chiu, M and Cole, B A and D'Enterria, D and Frantz, J E and Jia, J and Jin, J and Winter, D and Zajc, W A and Zhang, C},
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 = {10.1103/PHYSREVC.80.024909},
url = {https://www.osti.gov/biblio/21290078}, journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 2,
volume = 80,
place = {United States},
year = {2009},
month = {8}
}