2016/03/31 by Amir H. Rezaeian · 20 citations
Physics and Astronomy · #Environmental science #Geology #High-Energy Particle Collisions Research #Jet (fluid) #Large Hadron Collider #Mechanics #Nuclear physics #Oak Ridge National Laboratory #Optics #Paleontology #Particle physics #Particle physics theoretical and experimental studies #Photon #Physics #Quantum Chromodynamics and Particle Interactions #Ridge #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.93.094030
published in Physical review. D/Physical review. D. 93(9) (American Physical Society) · 15 pages, 12 figures; v2: results unchanged, presentation improved, typos corrected. The version to appear in PRD. arXiv admin note: text overlap with arXiv:1209.0478
arxiv created 2016/05/16 · openalex publication_date 2016/05/26 · arxiv updated 2016/05/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate long-range rapidity correlations of pairs of prompt photons and jets in the color glass condensate framework in proton-proton and proton-nucleus collisions at RHIC and the LHC. We show that photon-jet correlations exhibit long-range azimuthal collimation at the near side for low transverse momenta of the produced photon and jet in high-multiplicity events. These ridge-like features are strikingly similar to the observed ridge effect for dihadron correlations at RHIC and the LHC. We show that correlations in the relative rapidity and the relative azimuthal angle between pairs of prompt photons and jets strongly depend on the gluon saturation dynamics at small-x kinematics and such measurements can help to understand the true origin of the observed dihadron ridge in p+A collisions, and address whether the ridge is a universal phenomenon for all two-particle correlations at high-energy and high-multiplicity events. We also investigate whether there is a ridge-like structure for photon-hadron pair correlations at RHIC and the LHC. We find that the hadronization of jets has nontrivial effects on the photon-jet correlations.