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Report number arXiv:1506.08552 ; CERN-PH-EP-2015-142 ; CERN-PH-EP-2015-142
Title Centrality, rapidity and transverse momentum dependence of isolated prompt photon production in lead-lead collisions at sNN=2.76 TeV measured with the ATLAS detector
Related titleCentrality, rapidity and transverse momentum dependence of isolated prompt photon production in lead-lead collisions at sNN=2.76 TeV measured with the ATLAS detector
Author(s) ATLAS Collaboration  Mostra tots els 2882 autors
Publication 2016-03-28
Imprint 29 Jun 2015
Number of pages 28
Note 28 pages plus author list (45 pages total), 8 figures, 8 tables, Submitted to Phys. Rev. C., all figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2012-02/
In: Phys. Rev. C 93 (2016) 034914
DOI 10.1103/PhysRevC.93.034914
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ATLAS
Free keywords relativistic heavy ion physics ; photon production ; experimental results
Abstract Prompt photon production in sNN=2.76 TeV Pb+Pb collisions has been measured by the ATLAS experiment at the Large Hadron Collider using data collected in 2011 with an integrated luminosity of 0.14 nb1. Inclusive photon yields, scaled by the mean nuclear thickness function, are presented as a function of collision centrality and transverse momentum in two pseudo rapidity intervals, |η|<1.37 and 1.52<|η|<2.37. The scaled yields in the two pseudorapidity intervals, as well as the ratios of the forward yields to those at midrapidity, are compared to the expectations from next-to-leading order perturbative QCD calculations from JETPHOX. The measured cross sections agree well with the predictions for proton-proton collisions within statistical and systematic uncertainties. Both the yields and ratios are also compared to two other pQCD calculations, one which uses the isospin content appropriate to colliding lead nuclei, and another which includes the EPS09 nuclear modifications to the nucleon parton distribution functions.
Copyright/License preprint: © 2015-2024 CERN (License: CC-BY-4.0)
publication: © 2016-2024 CERN (License: CC-BY-3.0)



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