Abstract
A measurement of the cross section for the production of an isolated photon in association with jets in proton-proton collisions at a center-of-mass energy is presented. Photons are reconstructed in the pseudorapidity range and with a transverse energy . Jets are reconstructed in the rapidity range and with a transverse momentum . The differential cross section is measured, as a function of the photon transverse energy, for three different rapidity ranges of the leading- jet: , and . For each rapidity configuration the same-sign and opposite-sign cases are studied separately. The results are based on an integrated luminosity of , collected with the ATLAS detector at the LHC. Next-to-leading order perturbative QCD calculations are found to be in fair agreement with the data, except for , where the theoretical predictions overestimate the measured cross sections.
- Received 14 March 2012
DOI:https://doi.org/10.1103/PhysRevD.85.092014
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© 2012 CERN, for the ATLAS Collaboration