Rights statement: 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. © 2012 CERN, for the ATLAS Collaboration
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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - 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
AU - Barton, Adam
AU - Borissov, Guennadi
AU - Bouhova-Thacker, Eva
AU - Brodbeck, Timothy
AU - Chilingarov, Alexandre
AU - Davidson, Ruth
AU - de Mora, Lee
AU - Dearnaley, William
AU - Fox, Harald
AU - Henderson, Robert
AU - Hughes, Gareth
AU - Jones, Roger William Lewis
AU - Kartvelishvili, Vakhtang
AU - Long, Robin
AU - Love, Peter
AU - Ratoff, Peter
AU - Smizanska, Maria
AU - Walder, James
AU - The ATLAS collaboration
N1 - 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. © 2012 CERN, for the ATLAS Collaboration
PY - 2012/5/23
Y1 - 2012/5/23
N2 - 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-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 EγT≲45 GeV, where the theoretical predictions overestimate the measured cross sections.
AB - 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-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 EγT≲45 GeV, where the theoretical predictions overestimate the measured cross sections.
U2 - 10.1103/PhysRevD.85.092014
DO - 10.1103/PhysRevD.85.092014
M3 - Journal article
VL - 85
JO - Physical Review D
JF - Physical Review D
SN - 1550-7998
IS - 9
M1 - 092014
ER -