Elliptic and Hexadecapole Flow of Charged Hadrons in Au+Au Collisions at {radical}(s{sub NN})=200 GeV

Journal Article · Fri Aug 06 04:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.105.062301· OSTI ID:21470933

Adare, A; Bickley, A A; Ellinghaus, F; Glenn, A; Kinney, E; Kiriluk, K; Linden Levy, L A; Nagle, J L; Rosen, C A; Seele, J; Wysocki, M ^[1]; Afanasiev, S; Isupov, A; Litvinenko, A; Malakhov, A; Peresedov, V; Rukoyatkin, P; Zolin, L ^[2]; Aidala, C; Datta, A ^[3]

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1. University of Colorado, Boulder, Colorado 80309 (United States)
2. Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region (Russian Federation)
3. Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003-9337 (United States)

Differential measurements of the elliptic (v{sub 2}) and hexadecapole (v{sub 4}) Fourier flow coefficients are reported for charged hadrons as a function of transverse momentum (p{sub T}) and collision centrality or number of participant nucleons (N{sub part}) for Au+Au collisions at {radical}(s{sub NN})=200 GeV. The v{sub 2,4} measurements at pseudorapidity |{eta}|{<=}0.35, obtained with four separate reaction-plane detectors positioned in the range 1.0<|{eta}|<3.9, show good agreement, indicating the absence of significant {Delta}{eta}-dependent nonflow correlations. Sizable values for v{sub 4}(p{sub T}) are observed with a ratio v{sub 4}(p{sub T},N{sub part})/v{sub 2}{sup 2}(p{sub T},N{sub part}){approx_equal}0.8 for 50 < or approx. IN{sub part} < or approx. 200, which is compatible with the combined effects of a finite viscosity and initial eccentricity fluctuations. For N{sub part} > or approx. 200 this ratio increases up to 1.7 in the most central collisions.

• OSTI ID: 21470933
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 6 Vol. 105; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

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