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

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http://hdl.handle.net/10138/302220

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PHENIX Collaboration , Adare , A , Kim , D J & Rak , J 2019 , ' Measurement of two-particle correlations with respect to second- and third-order event planes in Au plus Au collisions at root s(NN)=200 GeV ' , Physical Review C , vol. 99 , no. 5 , 054903 . https://doi.org/10.1103/PhysRevC.99.054903

Titel: Measurement of two-particle correlations with respect to second- and third-order event planes in Au plus Au collisions at root s(NN)=200 GeV
Författare: PHENIX Collaboration; Adare, A.; Kim, D. J.; Rak, J.
Medarbetare: University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
Datum: 2019-05-07
Språk: eng
Sidantal: 29
Tillhör serie: Physical Review C
ISSN: 2469-9985
Permanenta länken (URI): http://hdl.handle.net/10138/302220
Abstrakt: We present measurements of azimuthal correlations of charged hadron pairs in root s(NN) = 200 GeV Au + Au collisions for the trigger and associated particle transverse-momentum ranges of 1 <p(T)(t) <10 GeV/c and 0.5 <p(T)(a) <10 GeV/c. After subtraction of an underlying event using a model that includes higher-order azimuthal anisotropy v(2), v(3,) and v(4), the away-side yield of the highest trigger-p(T)(p(T)(t) > 4 GeV/c) correlations is suppressed compared with that of correlations measured in p + p collisions. At the lowest associated particle p(T)(0.5 <p(T)(a) <1 GeV/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-p(T) trigger correlations (2 <p(T)(t) <4 GeV/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 Psi(2) and Psi(3). The angular correlations show an asymmetry when selecting the sign of the difference between the trigger-particle azimuthal angle and the Psi(2) 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 Psi(3) dependence can be resolved within experimental uncertainties.
Subject: QUARK-GLUON PLASMA
AU+AU COLLISIONS
PERSPECTIVE
ANISOTROPY
FLOW
114 Physical sciences
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