Measurement of the production cross section of an isolated photon associated with jets in proton-proton collisions at √s=7 TeV with the ATLAS detector
Author(s)Taylor, Frank E.
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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 √s=7 TeV is presented. Photons are reconstructed in the pseudorapidity range |ηγ|<1.37 and with a transverse energy ETγ>25 GeV. Jets are reconstructed in the rapidity range |yjet|<4.4 and with a transverse momentum pTjet>20 GeV. The differential cross section dσ/dETγ is measured, as a function of the photon transverse energy, for three different rapidity ranges of the leading-pT jet: |yjet|<1.2, 1.2≤|yjet|<2.8 and 2.8≤|yjet|<4.4. For each rapidity configuration the same-sign (ηγyjet≥0) and opposite-sign (ηγyjet<0) cases are studied separately. The results are based on an integrated luminosity of 37 pb-1, 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 ETγ[less than or equivalent to]45 GeV, where the theoretical measured cross sections.
DepartmentMassachusetts Institute of Technology. Department of Physics
Physical Review Letters
American Physical Society
G. Aad et al. (ATLAS Collaboration). "Measurement of the production cross section of an isolated photon associated with jets in proton-proton collisions at √s=7 TeV with the ATLAS detector" Physical Review Letters 85, 092014 (2012). © 2012 CERN, for the ATLAS Collaboration
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