Systematic Study of High-pT Direct Photon Production with the PHENIX Experiment at RHIC

Abstract

When studying the initial state and evolution of the matter created in relativistic heavy ion collisions, high-pT direct photons are a powerful probe. They are created in initial hard processes and in parton fragmentation, and possibly in interactions of partons with the hot and dense medium. We present systematic measurements of high-pT direct photon production in \sqrt{s_{NN}} = 200 GeV p+p and Au+Au collisions. The nuclear modification factor of direct photons is shown for 5 < pT < 18 GeV/c, and at very high transverse momenta it seems to be below unity in the most central Au+Au collisions.

4 pages, 4 figures. Invited parallel talk at The 19th International Conference On Ultra relativistic Nucleus-Nucleus Collisions (Quark Matter 2006), Shanghai China, Nov. 14-20, 2006

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Cited by in corpus (26)

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• Photon-Hadron Jet Correlations in p+p and Au+Au Collisions at sqrt(s_NN) = 200 GeV
• A systematic study of direct photon production in heavy ion collisions
• Inclusive prompt photon production in nuclear collisions at RHIC and LHC
• Probing Nuclear Matter with Jet Conversions
• Centrality-dependent direct photon pt spectra in Au+Au collisions at RHIC
• Evaluating Results from the Relativistic Heavy Ion Collider with Perturbative QCD and Hydrodynamics
• Photon Production in Hot and Dense Strongly Interacting Matter
• Diagnosing Energy Loss: PHENIX Results on High-pT Hadron Spectra
• Direct photons ~basis for characterizing heavy ion collisions~
• A Systematic Study on Direct Photon Production from Central Heavy Ion Collisions
• System size dependence of nuclear modification and azimuthal anisotropy of jet quenching
• Photon Radiation and Dilepton Production Induced by Rescattering in Strong Interacting Medium
• Jet energy loss and high $p_T$ photon production in hot quark-gluon plasma
• Quark Matter 2006: high-pT and jets
• Jet quenching and direct photon production
• Radiative and Collisional Energy Loss, and Photon-Tagged Jets at RHIC
• Measurement of the W, Z and photon production in lead-lead collisions at sqrt(s_NN) = 2.76 TeV with the ATLAS detector
• A Theoretic Review of Centrality-Dependent Direct Photon pt spectra in Au+Au Collisions at 200 GeV
• Prompt photon production in photoproduction, DIS and hadronic collisions
• Physics of Large-x Nuclear Suppression
• Measurements of soft and intermediate $p_T$ photons from hot and dense matter at RHIC-PHENIX
• Direct Photon Production at RHIC and LHC-energies: Measured Data Versus a Model
• Measurement of pi0 and eta Mesons with PHENIX in sqrt(s_NN) = 200 GeV Au+Au Collisions at RHIC
• Measurement of photons via conversion pairs in Au+Au collisions at sqrt(s_NN) = 200 GeV with the PHENIX experiment at RHIC