Campus Units

Physics and Astronomy

Document Type

Article

Publication Version

Published Version

Publication Date

8-4-2010

Journal or Book Title

Physical Review Letters

Volume

105

Issue

6

First Page

062301

DOI

10.1103/PhysRevLett.105.062301

Abstract

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

Comments

This article is published as Adare, A., S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, H. Al-Bataineh, J. Alexander et al. "Elliptic and hexadecapole flow of charged hadrons in Au+ Au collisions at s N N= 200 GeV." Physical review letters 105, no. 6 (2010): 062301. DOI:10.1103/PhysRevLett.105.062301. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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