Event-plane-dependent dihadron correlations with harmonic vn subtraction in Au + Au collisions at √sNN=200 GeV

Agakishiev, H. and Planinić, Mirko and Poljak, Nikola and Zoulkarneeva, Y. (STAR Collaboration) (2014) Event-plane-dependent dihadron correlations with harmonic vn subtraction in Au + Au collisions at √sNN=200 GeV. Physical Review C, 89 (4). 41901(R)-7. ISSN 0556-2813

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Abstract

STAR measurements of dihadron azimuthal correlations (Δϕ) are reported in midcentral (20–60%) Au + Au collisions at √sNN=200 GeV as a function of the trigger particle's azimuthal angle relative to the event plane, ϕs=|ϕt−ψEP|. The elliptic (v2), triangular (v3), and quadratic (v4) 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 (ϕs∼0). The away-side (|Δϕ|>π/2) correlation shows a modification from d + Au data, varying with ϕs. The modification may be a consequence of path-length-dependent jet quenching and may lead to a better understanding of high-density QCD.

Item Type: Article
Date: April 2014
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2014) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 05 Jun 2014 09:03
Last Modified: 10 Jun 2014 13:18
URI: http://digre.pmf.unizg.hr/id/eprint/2226

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