Aug 12 – 18, 2012
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Inclusive isolated photons in pp and PbPb collisions at 2.76 TeV with CMS

Aug 15, 2012, 11:20 AM


Oral Presentation Electroweak probes Parallel 4C: Electro-Weak Probes (Chair D. D'Enterria)


George Stephans (Massachusetts Inst. of Technology (US))


Final data on isolated photon production will be presented, measured in both pp and PbPb collisions at a nucleon-nucleon center-of-mass energy of 2.76 TeV with the CMS detector at the LHC. The isolated photon transverse energy (ET) spectra, covering the pseudorapidity range |eta| < 1.44 and transverse energy ET > 20 GeV, are found to be in good agreement with next-to-leading-order perturbative QCD predictions. The measured isolated photon RAA, with a reference based on pp data, is consistent with unity for all PbPb collision centralities.

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