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Jet-hadron correlations with respect to the event plane in sNN =200 GeV Au+Au collisions in STAR
Resource type
Authors/contributors
- STAR Collaboration (Author)
- Finch, E. (Contributor)
Title
Jet-hadron correlations with respect to the event plane in sNN =200 GeV Au+Au collisions in STAR
Abstract
Angular distributions of charged particles relative to jet axes are studied in sNN=200 GeV Au+Au collisions as a function of the jet orientation with respect to the event plane. This differential study tests the expected path-length dependence of energy loss experienced by a hard-scattered parton as it traverses the hot and dense medium formed in heavy-ion collisions. A second-order event plane is used in the analysis as an experimental estimate of the reaction plane formed by the collision impact parameter and the beam direction. Charged-particle jets with 15<pT,jet<20 and 20<pT,jet<40GeV/c were reconstructed with the anti-kT algorithm with radius parameter setting of R=0.4 in the 20-50% centrality bin to maximize the initial-state eccentricity of the interaction region. The reaction plane fit method is implemented to remove the flow-modulated background with better precision than prior methods. Yields and widths of jet-associated charged-hadron distributions are extracted in three angular bins between the jet axis and the event plane. The event-plane (EP) dependence is further quantified by ratios of the associated yields in different EP bins. No dependence on orientation of the jet axis with respect to the event plane is seen within the uncertainties in the kinematic regime studied. This finding is consistent with a similar experimental observation by ALICE in sNN = 2.76 TeV Pb-Pb collision data. © 2024 American Physical Society.
Publication
Physical Review C
Date
2024
Volume
109
Issue
4
Citation Key
starcollaborationJethadronCorrelationsRespect2024
ISSN
2469-9985
Archive
Scopus
Language
English
Citation
STAR Collaboration. (2024). Jet-hadron correlations with respect to the event plane in sNN =200 GeV Au+Au collisions in STAR. Physical Review C, 109(4). Scopus. https://doi.org/10.1103/PhysRevC.109.044909
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