Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector
(2021) In Journal of High Energy Physics 2021(11).- Abstract
- A measurement of prompt photon-pair production in proton-proton collisions at s = 13 TeV is presented. The data were recorded by the ATLAS detector at the LHC with an integrated luminosity of 139 fb−1. Events with two photons in the well-instrumented region of the detector are selected. The photons are required to be isolated and have a transverse momentum of pT,γ1(2)> 40 (30) GeV for the leading (sub-leading) photon. The differential cross sections as functions of several observables for the diphoton system are measured and compared with theoretical predictions from state-of-the-art Monte Carlo and fixed-order calculations. The QCD predictions from next-to-next-to-leading-order calculations and multi-leg merged calculations are able to... (More)
- A measurement of prompt photon-pair production in proton-proton collisions at s = 13 TeV is presented. The data were recorded by the ATLAS detector at the LHC with an integrated luminosity of 139 fb−1. Events with two photons in the well-instrumented region of the detector are selected. The photons are required to be isolated and have a transverse momentum of pT,γ1(2)> 40 (30) GeV for the leading (sub-leading) photon. The differential cross sections as functions of several observables for the diphoton system are measured and compared with theoretical predictions from state-of-the-art Monte Carlo and fixed-order calculations. The QCD predictions from next-to-next-to-leading-order calculations and multi-leg merged calculations are able to describe the measured integrated and differential cross sections within uncertainties, whereas lower-order calculations show significant deviations, demonstrating that higher-order perturbative QCD corrections are crucial for this process. The resummed predictions with parton showers additionally provide an excellent description of the low transverse-momentum regime of the diphoton system. [Figure not available: see fulltext.]. © 2021, The Author(s). (Less)
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- publishing date
- 2021
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Hadron-Hadron scattering (experiments), photon production, proton-proton scattering, QCD
- in
- Journal of High Energy Physics
- volume
- 2021
- issue
- 11
- article number
- 169
- publisher
- Springer
- external identifiers
-
- scopus:85120959330
- ISSN
- 1029-8479
- DOI
- 10.1007/JHEP11(2021)169
- language
- English
- LU publication?
- yes
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- aba8f003-bb12-435b-895d-573a9645e15f
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- 2022-02-01 13:26:24
- date last changed
- 2023-04-02 21:22:35
@article{aba8f003-bb12-435b-895d-573a9645e15f, abstract = {{A measurement of prompt photon-pair production in proton-proton collisions at s = 13 TeV is presented. The data were recorded by the ATLAS detector at the LHC with an integrated luminosity of 139 fb−1. Events with two photons in the well-instrumented region of the detector are selected. The photons are required to be isolated and have a transverse momentum of pT,γ1(2)> 40 (30) GeV for the leading (sub-leading) photon. The differential cross sections as functions of several observables for the diphoton system are measured and compared with theoretical predictions from state-of-the-art Monte Carlo and fixed-order calculations. The QCD predictions from next-to-next-to-leading-order calculations and multi-leg merged calculations are able to describe the measured integrated and differential cross sections within uncertainties, whereas lower-order calculations show significant deviations, demonstrating that higher-order perturbative QCD corrections are crucial for this process. The resummed predictions with parton showers additionally provide an excellent description of the low transverse-momentum regime of the diphoton system. [Figure not available: see fulltext.]. © 2021, The Author(s).}}, author = {{Aad, G and Åkesson, Torsten and Corrigan, Eric Edward and Doglioni, Caterina and Geisen, Jannik and Brottmann Hansen, Eva and Hedberg, Vincent and Jarlskog, Göran and Konya, Balazs and Lytken, Else and Mankinen, Katja and Marcon, Caterina and Mjörnmark, Ulf and Mullier, Geoffrey André Adrien and Pöttgen, Ruth and Skorda, Eleni and Smirnova, Oxana and Zwalinski, L}}, issn = {{1029-8479}}, keywords = {{Hadron-Hadron scattering (experiments); photon production; proton-proton scattering; QCD}}, language = {{eng}}, number = {{11}}, publisher = {{Springer}}, series = {{Journal of High Energy Physics}}, title = {{Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector}}, url = {{http://dx.doi.org/10.1007/JHEP11(2021)169}}, doi = {{10.1007/JHEP11(2021)169}}, volume = {{2021}}, year = {{2021}}, }