Photon tagged correlations in heavy ion collisions

Abstract

A detailed study of various two-particle correlation functions involving photons and neutral pions is presented in proton-proton and lead-lead collisions at the LHC energy. The aim is to use these correlation functions to quantify the effect of the medium (in lead-lead collisions) on the jet decay properties. The calculations are carried out at the leading order in QCD but the next-to-leading order corrections are also discussed. The competition between different production mechanisms makes the connection between the jet energy loss spectrum and the gamma-pi correlations somewhat indirect while the gamma-gamma correlations have a clearer relation to the jet fragmentation properties.

32 pages, 19 figures. Minor changes, published version

References in corpus (6)

• Leading-particle suppression in high energy nucleus-nucleus collisions
• The Fragility of High-pT Hadron Spectra as a Hard Probe
• Jet tomography
• Hard probes in heavy ion collisions at the LHC: PDFs, shadowing and $pA$ collisions
• Photon Physics in Heavy Ion Collisions at the LHC
• Prompt photon production in nuclear collisions

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• Jets in Nuclear Collisions: Status and Perspective
• Predictions for the LHC heavy ion programme
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