Elliptic and Hexadecapole Flow of Charged Hadrons in Au+Au Collisions at {radical}(s{sub NN})=200 GeV
- University of Colorado, Boulder, Colorado 80309 (United States)
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region (Russian Federation)
- 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, Vol. 105, Issue 6; Other Information: DOI: 10.1103/PhysRevLett.105.062301; (c) 2010 American Institute of Physics; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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Elliptic and Hexadecapole Flow of Charged Hadrons in Au+Au Collisions at s_NN = 200 GeV
Systematic studies of elliptic flow measurements in Au+Au collisions at {radical}(s{sub NN})=200 GeV
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