TY - JOUR
T1 - Measurement of the production cross section of an isolated photon associated with jets in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector
AU - Aad, G.
AU - Boelaert, Nele Maria Philomena
AU - Dam, Mogens
AU - Hansen, Jørgen Beck
AU - Hansen, Peter Henrik
AU - Hansen, Jørn Dines
AU - Hansen, John Renner
AU - Heisterkamp, Simon Johann Franz
AU - Jørgensen, Morten Dam
AU - Mehlhase, Sascha
AU - Klinkby, Esben Bryndt
AU - Nilsson, Björn Stefan
AU - Petersen, Troels Christian
AU - Løvschall-Jensen, Ask Emil
AU - Xella, Stefania
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=7TeV is presented. Photons are reconstructed in the pseudorapidity range |ηγ|<1.37 and with a transverse energy ETγ>25GeV. Jets are reconstructed in the rapidity range |yjet|<4.4 and with a transverse momentum pTjet>20GeV. 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 37pb-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 45GeV, 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=7TeV is presented. Photons are reconstructed in the pseudorapidity range |ηγ|<1.37 and with a transverse energy ETγ>25GeV. Jets are reconstructed in the rapidity range |yjet|<4.4 and with a transverse momentum pTjet>20GeV. 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 37pb-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 45GeV, where the theoretical predictions overestimate the measured cross sections.
U2 - 10.1103/PhysRevD.85.092014
DO - 10.1103/PhysRevD.85.092014
M3 - Journal article
SN - 1550-7998
VL - 85
SP - 092014
JO - Physical Review D (Particles, Fields, Gravitation and Cosmology)
JF - Physical Review D (Particles, Fields, Gravitation and Cosmology)
IS - 9
ER -