Measurement of two-particle correlations with respect to second- and third-order event planes in Au + Au collisions at s NN =200 GeV

PHENIX Collaboration

Research output: Contribution to journalArticle

Abstract

We present measurements of azimuthal correlations of charged hadron pairs in sNN=200 GeV Au+Au collisions for the trigger and associated particle transverse-momentum ranges of 1<pTt<10GeV/c and 0.5<pTa<10GeV/c. After subtraction of an underlying event using a model that includes higher-order azimuthal anisotropy v2, v3, and v4, the away-side yield of the highest trigger-pT(pTt>4GeV/c) correlations is suppressed compared with that of correlations measured in p+p collisions. At the lowest associated particle pT(0.5<pTa<1GeV/c), the away-side shape and yield are modified relative to those in p+p collisions. These observations are consistent with the scenario of radiative-jet energy loss. For the low-pT trigger correlations (2<pTt<4GeV/c), a finite away-side yield exists and we explore the dependence of the shape of the away-side within the context of an underlying-event model. Correlations are also studied differentially versus event-plane angle ψ2 and ψ3. The angular correlations show an asymmetry when selecting the sign of the difference between the trigger-particle azimuthal angle and the ψ2 event plane. This asymmetry and the measured suppression of the pair yield out-of-plane is consistent with a path-length-dependent energy loss. No ψ3 dependence can be resolved within experimental uncertainties.

Original languageEnglish
Article number054903
JournalPhysical Review C
Volume99
Issue number5
DOIs
Publication statusPublished - 2019 May 7

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collisions
actuators
energy dissipation
asymmetry
angular correlation
transverse momentum
retarding

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Measurement of two-particle correlations with respect to second- and third-order event planes in Au + Au collisions at s NN =200 GeV. / PHENIX Collaboration.

In: Physical Review C, Vol. 99, No. 5, 054903, 07.05.2019.

Research output: Contribution to journalArticle

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abstract = "We present measurements of azimuthal correlations of charged hadron pairs in sNN=200 GeV Au+Au collisions for the trigger and associated particle transverse-momentum ranges of 14GeV/c) correlations is suppressed compared with that of correlations measured in p+p collisions. At the lowest associated particle pT(0.5",
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AU - Al-Bataineh, H.

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AU - Bagoly, A.

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AU - Hong, Byungsik

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