Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/101959
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Type: Journal article
Title: 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
Other Titles: Measurement of the production cross section of an isolated photon associated with jets in proton-proton collisions at root s=7 TeV with the ATLAS detector
Author: Aad, G.
ATLAS Collaboration
Citation: Physical Review D - Particles, Fields, Gravitation and Cosmology, 2012; 85(9):092014-1-092014-30
Publisher: American Physical Society
Issue Date: 2012
ISSN: 1550-7998
1550-2368
Statement of
Responsibility: 
G. Aad ... P. Jackson ... L. Lee ... A. Petridis ... N. Soni ... M.J. White ... et al. (ATLAS Collaboration)
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 s√=7  TeV is presented. Photons are reconstructed in the pseudorapidity range |ηγ|<1.37 and with a transverse energy EγT>25  GeV. Jets are reconstructed in the rapidity range |yjet|<4.4 and with a transverse momentum pjetT>20  GeV. The differential cross section dσ/dEγT is measured, as a function of the photon transverse energy, for three different rapidity ranges of the leading-pτ 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 EγT≲45  GeV, where the theoretical predictions overestimate the measured cross sections.
Rights: © 2012 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
RMID: 0030020252
DOI: 10.1103/PhysRevD.85.092014
Appears in Collections:Physics publications

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