Event-plane-dependent dihadron correlations with harmonic v[subscript n] subtraction in Au + Au collisions at √s[subscript NN] = 200 GeV
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Agakishiev-2014-Event-plane-dependent dihadron.pdf
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Checksum (MD5)
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Author(s)
Balewski, Jan T.
Betancourt, Michael Joseph
Corliss, Ross
Hays-Wehle, James Prewitt
Leight, William Axel
Milner, Richard G.
Redwine, Robert P.
Sakuma, T.
Seele, J.
Steadman, Stephen G.
Date Issued
April 2014
Journal
Physical Review C
Publisher
American Physical Society
Citation
Agakishiev, H., M. M. Aggarwal, Z. Ahammed, A. V. Alakhverdyants, I. Alekseev, J. Alford, B. D. Anderson, et al. Event-plane-dependent dihadron correlations with harmonic v[subscript n] subtraction in Au + Au collisions at √s[subscript NN] = 200 GeV.” Phys. Rev. C 89, no. 4 (April 2014). © 2014 American Physical Society
Version
Final published version
Abstract
STAR measurements of dihadron azimuthal correlations (Δϕ) are reported in midcentral (20–60%) Au + Au collisions at √s[subscript NN] = 200 GeV as a function of the trigger particle's azimuthal angle relative to the event plane, ϕ[subscript s] = |ϕ[subscript t] − ψ[subscript EP]|. The elliptic (v[subscript 2]), triangular (v[subscript 3]), and quadratic (v[subscript 4]) flow harmonic backgrounds are subtracted using the zero yield at minimum (ZYAM) method. The results are compared to minimum-bias d + Au collisions. It is found that a finite near-side (|Δϕ| < π/2) long-range pseudorapidity correlation (ridge) is present in the in-plane direction (ϕ[subscript s] ∼ 0). The away-side (|Δϕ| > π/2) correlation shows a modification from d + Au data, varying with ϕ[subscript s]. The modification may be a consequence of path-length-dependent jet quenching and may lead to a better understanding of high-density QCD.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevC.89.041901
