Measurement of the inclusive isolated prompt photons cross section in pp collisions at √s=7 TeV with the ATLAS detector using 4.6 fb-1

A measurement of the cross section for the production of isolated prompt photons in pp collisions at a
center-of-mass energy √s=7 TeV is presented. The results are based on an integrated luminosity of
4.6 fb−1 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 .