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ATLAS_2013_I1263495

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A measurement of the cross section for the production of isolated prompt photons in pp collisions at a center-of-mass energy sqrts=7 TeV is presented. The results are based on an integrated luminosity of 4.6 fb1 collected with the ATLAS detector at the LHC. The cross section is measured as a function of photon pseudorapidity ηγ and transverse energy EγT in the kinematic range 100<EγT<1000 GeV and in the regions |ηγ|<1.37 and 1.52<|ηγ|<2.37. The results are compared to leading-order parton-shower Monte Carlo models and next-to-leading order perturbative QCD calculations. Next to-leading-order perturbative QCD calculations agree well with the measured cross sections as a function of EγT and ηγ.

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