Elliptic and Hexadecapole Flow of Charged Hadrons in Au + Au Collisions at root s(NN)=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:993050

Adare, A

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}| {le} 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} 0.8 for 50 {approx}< N{sub part} {approx}< 200, which is compatible with the combined effects of a finite viscosity and initial eccentricity fluctuations. For N{sub part} {approx}> 200 this ratio increases up to 1.7 in the most central collisions.

• Research Organization: Brookhaven National Laboratory (BNL) Relativistic Heavy Ion Collider
• Sponsoring Organization: DOE - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 993050
• Report Number(s): BNL--94014-2010-JA; KB0201021
• 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

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
FLUCTUATIONS
HADRONS
HEXADECAPOLES
NUCLEONS
TRANSVERSE MOMENTUM
VISCOSITY
relativistic heavy ion collider