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

G. Aad; Nele Maria Philomena Boelaert; Mogens Dam; Jørgen Beck Hansen; Peter Henrik Hansen; Jørn Dines Hansen; John Renner Hansen; Simon Johann Franz Heisterkamp; Morten Dam Jørgensen; Sascha Mehlhase; Esben Bryndt Klinkby; Björn Stefan Nilsson; Troels Christian Petersen; Ask Emil Løvschall-Jensen; Stefania Xella

doi:10.1103/PhysRevD.85.092014

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

G. Aad, Nele Maria Philomena Boelaert, Mogens Dam, Jørgen Beck Hansen, Peter Henrik Hansen, Jørn Dines Hansen, John Renner Hansen, Simon Johann Franz Heisterkamp, Morten Dam Jørgensen, Sascha Mehlhase, Esben Bryndt Klinkby, Björn Stefan Nilsson, Troels Christian Petersen, Ask Emil Løvschall-Jensen, Stefania Xella

45 Citations (Scopus)

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=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-p_T 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.

Original language	English
Journal	Physical Review D (Particles, Fields, Gravitation and Cosmology)
Volume	85
Issue number	9
Pages (from-to)	092014
Number of pages	30
ISSN	1550-7998
DOIs	https://doi.org/10.1103/PhysRevD.85.092014
Publication status	Published - 23 May 2012

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Aad, G., Boelaert, N. M. P., Dam, M., Hansen, J. B., Hansen, P. H., Hansen, J. D., Hansen, J. R., Heisterkamp, S. J. F., Jørgensen, M. D., Mehlhase, S., Klinkby, E. B., Nilsson, B. S., Petersen, T. C., Løvschall-Jensen, A. E., & Xella, S. (2012). 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. Physical Review D (Particles, Fields, Gravitation and Cosmology), 85(9), 092014. https://doi.org/10.1103/PhysRevD.85.092014

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. / Aad, G.; Boelaert, Nele Maria Philomena; Dam, Mogens et al.

In: Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol. 85, No. 9, 23.05.2012, p. 092014.

Research output: Contribution to journal › Journal article › Research › peer-review

Aad, G, Boelaert, NMP, Dam, M , Hansen, JB , Hansen, PH , Hansen, JD , Hansen, JR, Heisterkamp, SJF, Jørgensen, MD, Mehlhase, S, Klinkby, EB, Nilsson, BS, Petersen, TC, Løvschall-Jensen, AE & Xella, S 2012, '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', Physical Review D (Particles, Fields, Gravitation and Cosmology), vol. 85, no. 9, pp. 092014. https://doi.org/10.1103/PhysRevD.85.092014

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title = "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",

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=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.",

author = "G. Aad and Boelaert, {Nele Maria Philomena} and Mogens Dam and Hansen, {J{\o}rgen Beck} and Hansen, {Peter Henrik} and Hansen, {J{\o}rn Dines} and Hansen, {John Renner} and Heisterkamp, {Simon Johann Franz} and J{\o}rgensen, {Morten Dam} and Sascha Mehlhase and Klinkby, {Esben Bryndt} and Nilsson, {Bj{\"o}rn Stefan} and Petersen, {Troels Christian} and L{\o}vschall-Jensen, {Ask Emil} and Stefania Xella",

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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 - 2470-0010

VL - 85

SP - 092014

JO - Physical Review D

JF - Physical Review D

IS - 9

ER -

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

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