File:PhysRevC.99.054903.pdf
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Measurement of two-particle correlations with respect to second- and third-order event planes in Au + Au collisions at √sNN=200 GeV
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[edit]DescriptionPhysRevC.99.054903.pdf |
English: 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<paT<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<paT<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. |
Date | |
Source |
https://journals.aps.org/prc/abstract/10.1103/PhysRevC.99.054903 https://doi.org/10.1103/PhysRevC.99.054903 |
Author | A. Adare et al. (PHENIX Collaboration) |
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Short title | Measurement of two-particle correlations with respect to second- and third-order event planes in Au + Au collisions at $\sqrt{s_{\it NN}}=200$ GeV |
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Image title | Phys. Rev. C 99, 054903 (2019). doi:10.1103/PhysRevC.99.054903 |
Author | A. Adare |
Keywords |
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Software used | Published by the American Physical Society |
Conversion program | Acrobat Distiller 10.1.10 (Windows) |
Encrypted | no |
Page size | 589.5 x 792 pts |
Version of PDF format | 1.3 |
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