Measurements of integrated and differential cross sections for isolated photon pair production in pp collisions at root s=8 TeV with the ATLAS detector

M. Aaboud; G. Aad; B. Abbott; J. Abdallah; O. Abdinov; B Abeloos; Sarah Abidi; O.S. AbouZeid; NL Abraham; H. Abreu; R. Abreu; Y. Abulaiti; B.S. Acharya; J Adachi; Mogens Dam; Jørn Dines Hansen; Jørgen Beck Hansen; Stefania Xella; Peter Henrik Hansen; Troels Christian Petersen; Alejandro Alonso Diaz; James William Monk; Lars Egholm Pedersen; Graig Wiglesworth; Geert-Jan Besjes; Lotte Ansgaard Thomsen; Ask Emil Løvschall-Jensen; Gorm Aske Gram Krohn Galster; Simon Holm Stark; Fabian Alexander Jürgen Thiele; Flavia de Almeida Dias; Milena Bajic; John Barr; H. Zhu; H. Arnold

doi:10.1103/PhysRevD.95.112005

Measurements of integrated and differential cross sections for isolated photon pair production in pp collisions at root s=8 TeV with the ATLAS detector

M. Aaboud, G. Aad, B. Abbott, J. Abdallah, O. Abdinov, B Abeloos, Sarah Abidi, O.S. AbouZeid, NL Abraham, H. Abreu, R. Abreu, Y. Abulaiti, B.S. Acharya, J Adachi, Mogens Dam, Jørn Dines Hansen, Jørgen Beck Hansen, Stefania Xella, Peter Henrik Hansen, Troels Christian PetersenAlejandro Alonso Diaz, James William Monk, Lars Egholm Pedersen, Graig Wiglesworth, Geert-Jan Besjes, Lotte Ansgaard Thomsen, Ask Emil Løvschall-Jensen, Gorm Aske Gram Krohn Galster, Simon Holm Stark, Fabian Alexander Jürgen Thiele, Flavia de Almeida Dias, Milena Bajic, John Barr, H. Zhu, H. Arnold

Experimental Particle Physics

19 Citations (Scopus)

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Abstract

A measurement of the production cross section for two isolated photons in proton-proton collisions at a center-of-mass energy of s=8 TeV is presented. The results are based on an integrated luminosity of 20.2 fb-1 recorded by the ATLAS detector at the Large Hadron Collider. The measurement considers photons with pseudorapidities satisfying |ηγ|<1.37 or 1.56<|ηγ|<2.37 and transverse energies of respectively ET,1γ>40 GeV and ET,2γ>30 GeV for the two leading photons ordered in transverse energy produced in the interaction. The background due to hadronic jets and electrons is subtracted using data-driven techniques. The fiducial cross sections are corrected for detector effects and measured differentially as a function of six kinematic observables. The measured cross section integrated within the fiducial volume is 16.8±0.8 pb. The data are compared to fixed-order QCD calculations at next-to-leading-order and next-to-next-to-leading-order accuracy as well as next-to-leading-order computations including resummation of initial-state gluon radiation at next-to-next-to-leading logarithm or matched to a parton shower, with relative uncertainties varying from 5% to 20%.

Original language	English
Article number	112005
Journal	Physical Review D
Volume	95
Issue number	11
ISSN	2470-0010
DOIs	https://doi.org/10.1103/PhysRevD.95.112005
Publication status	Published - 1 Jun 2017

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Aaboud, M., Aad, G., Abbott, B., Abdallah, J., Abdinov, O., Abeloos, B., Abidi, S., AbouZeid, O. S., Abraham, NL., Abreu, H., Abreu, R., Abulaiti, Y., Acharya, B. S., Adachi, J., Dam, M., Hansen, J. D., Hansen, J. B., Xella, S., Hansen, P. H., ... Arnold, H. (2017). Measurements of integrated and differential cross sections for isolated photon pair production in pp collisions at root s=8 TeV with the ATLAS detector. Physical Review D, 95(11), Article 112005. https://doi.org/10.1103/PhysRevD.95.112005

Aaboud, M, Aad, G, Abbott, B, Abdallah, J, Abdinov, O, Abeloos, B, Abidi, S, AbouZeid, OS, Abraham, NL, Abreu, H, Abreu, R, Abulaiti, Y, Acharya, BS, Adachi, J, Dam, M , Hansen, JD , Hansen, JB , Xella, S , Hansen, PH , Petersen, TC, Alonso Diaz, A, Monk, JW, Pedersen, LE, Wiglesworth, G, Besjes, G-J, Thomsen, LA, Løvschall-Jensen, AE, Galster, GAGK, Stark, SH, Thiele, FAJ, de Almeida Dias, F, Bajic, M, Barr, J, Zhu, H & Arnold, H 2017, 'Measurements of integrated and differential cross sections for isolated photon pair production in pp collisions at root s=8 TeV with the ATLAS detector', Physical Review D, vol. 95, no. 11, 112005. https://doi.org/10.1103/PhysRevD.95.112005

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title = "Measurements of integrated and differential cross sections for isolated photon pair production in pp collisions at root s=8 TeV with the ATLAS detector",

abstract = "A measurement of the production cross section for two isolated photons in proton-proton collisions at a center-of-mass energy of s=8 TeV is presented. The results are based on an integrated luminosity of 20.2 fb-1 recorded by the ATLAS detector at the Large Hadron Collider. The measurement considers photons with pseudorapidities satisfying |ηγ|<1.37 or 1.56<|ηγ|<2.37 and transverse energies of respectively ET,1γ>40 GeV and ET,2γ>30 GeV for the two leading photons ordered in transverse energy produced in the interaction. The background due to hadronic jets and electrons is subtracted using data-driven techniques. The fiducial cross sections are corrected for detector effects and measured differentially as a function of six kinematic observables. The measured cross section integrated within the fiducial volume is 16.8±0.8 pb. The data are compared to fixed-order QCD calculations at next-to-leading-order and next-to-next-to-leading-order accuracy as well as next-to-leading-order computations including resummation of initial-state gluon radiation at next-to-next-to-leading logarithm or matched to a parton shower, with relative uncertainties varying from 5% to 20%.",

author = "M. Aaboud and G. Aad and B. Abbott and J. Abdallah and O. Abdinov and B Abeloos and Sarah Abidi and O.S. AbouZeid and NL Abraham and H. Abreu and R. Abreu and Y. Abulaiti and B.S. Acharya and J Adachi and Mogens Dam and Hansen, {J{\o}rn Dines} and Hansen, {J{\o}rgen Beck} and Stefania Xella and Hansen, {Peter Henrik} and Petersen, {Troels Christian} and {Alonso Diaz}, Alejandro and Monk, {James William} and Pedersen, {Lars Egholm} and Graig Wiglesworth and Geert-Jan Besjes and Thomsen, {Lotte Ansgaard} and L{\o}vschall-Jensen, {Ask Emil} and Galster, {Gorm Aske Gram Krohn} and Stark, {Simon Holm} and Thiele, {Fabian Alexander J{\"u}rgen} and {de Almeida Dias}, Flavia and Milena Bajic and John Barr and H. Zhu and H. Arnold",

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T1 - Measurements of integrated and differential cross sections for isolated photon pair production in pp collisions at root s=8 TeV with the ATLAS detector

AU - Aaboud, M.

AU - Aad, G.

AU - Abbott, B.

AU - Abdallah, J.

AU - Abdinov, O.

AU - Abeloos, B

AU - Abidi, Sarah

AU - AbouZeid, O.S.

AU - Abraham, NL

AU - Abreu, H.

AU - Abreu, R.

AU - Abulaiti, Y.

AU - Acharya, B.S.

AU - Adachi, J

AU - Dam, Mogens

AU - Hansen, Jørn Dines

AU - Hansen, Jørgen Beck

AU - Xella, Stefania

AU - Hansen, Peter Henrik

AU - Petersen, Troels Christian

AU - Alonso Diaz, Alejandro

AU - Monk, James William

AU - Pedersen, Lars Egholm

AU - Wiglesworth, Graig

AU - Besjes, Geert-Jan

AU - Thomsen, Lotte Ansgaard

AU - Løvschall-Jensen, Ask Emil

AU - Galster, Gorm Aske Gram Krohn

AU - Stark, Simon Holm

AU - Thiele, Fabian Alexander Jürgen

AU - de Almeida Dias, Flavia

AU - Bajic, Milena

AU - Barr, John

AU - Zhu, H.

AU - Arnold, H.

PY - 2017/6/1

Y1 - 2017/6/1

N2 - A measurement of the production cross section for two isolated photons in proton-proton collisions at a center-of-mass energy of s=8 TeV is presented. The results are based on an integrated luminosity of 20.2 fb-1 recorded by the ATLAS detector at the Large Hadron Collider. The measurement considers photons with pseudorapidities satisfying |ηγ|<1.37 or 1.56<|ηγ|<2.37 and transverse energies of respectively ET,1γ>40 GeV and ET,2γ>30 GeV for the two leading photons ordered in transverse energy produced in the interaction. The background due to hadronic jets and electrons is subtracted using data-driven techniques. The fiducial cross sections are corrected for detector effects and measured differentially as a function of six kinematic observables. The measured cross section integrated within the fiducial volume is 16.8±0.8 pb. The data are compared to fixed-order QCD calculations at next-to-leading-order and next-to-next-to-leading-order accuracy as well as next-to-leading-order computations including resummation of initial-state gluon radiation at next-to-next-to-leading logarithm or matched to a parton shower, with relative uncertainties varying from 5% to 20%.

AB - A measurement of the production cross section for two isolated photons in proton-proton collisions at a center-of-mass energy of s=8 TeV is presented. The results are based on an integrated luminosity of 20.2 fb-1 recorded by the ATLAS detector at the Large Hadron Collider. The measurement considers photons with pseudorapidities satisfying |ηγ|<1.37 or 1.56<|ηγ|<2.37 and transverse energies of respectively ET,1γ>40 GeV and ET,2γ>30 GeV for the two leading photons ordered in transverse energy produced in the interaction. The background due to hadronic jets and electrons is subtracted using data-driven techniques. The fiducial cross sections are corrected for detector effects and measured differentially as a function of six kinematic observables. The measured cross section integrated within the fiducial volume is 16.8±0.8 pb. The data are compared to fixed-order QCD calculations at next-to-leading-order and next-to-next-to-leading-order accuracy as well as next-to-leading-order computations including resummation of initial-state gluon radiation at next-to-next-to-leading logarithm or matched to a parton shower, with relative uncertainties varying from 5% to 20%.

U2 - 10.1103/PhysRevD.95.112005

DO - 10.1103/PhysRevD.95.112005

M3 - Journal article

SN - 2470-0010

VL - 95

JO - Physical Review D

JF - Physical Review D

IS - 11

M1 - 112005

ER -

Measurements of integrated and differential cross sections for isolated photon pair production in pp collisions at root s=8 TeV with the ATLAS detector

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