Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector
Main Author: | |
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Publication Date: | 2021 |
Other Authors: | , , , |
Format: | Article |
Language: | eng |
Source: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Download full: | http://hdl.handle.net/10316/105002 https://doi.org/10.1007/JHEP11(2021)169 |
Summary: | A measurement of prompt photon-pair production in proton-proton collisions at p 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 wellinstrumented region of the detector are selected. The photons are required to be isolated and have a transverse momentum of pT, 1(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-leadingorder 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. |
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Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detectorHadron-Hadron scattering (experiments)photon productionproton-proton scatteringQCDA measurement of prompt photon-pair production in proton-proton collisions at p 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 wellinstrumented region of the detector are selected. The photons are required to be isolated and have a transverse momentum of pT, 1(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-leadingorder 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.Springer Nature2021-11info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/105002http://hdl.handle.net/10316/105002https://doi.org/10.1007/JHEP11(2021)169engFiolhais, M. C. N.Gonçalo, R.Veloso, F.Wolters, H.ATLAS Collaborationinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-01-27T10:21:54Zoai:estudogeral.uc.pt:10316/105002Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:21:36.264498Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector |
title |
Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector |
spellingShingle |
Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector Fiolhais, M. C. N. Hadron-Hadron scattering (experiments) photon production proton-proton scattering QCD |
title_short |
Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector |
title_full |
Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector |
title_fullStr |
Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector |
title_full_unstemmed |
Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector |
title_sort |
Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector |
author |
Fiolhais, M. C. N. |
author_facet |
Fiolhais, M. C. N. Gonçalo, R. Veloso, F. Wolters, H. ATLAS Collaboration |
author_role |
author |
author2 |
Gonçalo, R. Veloso, F. Wolters, H. ATLAS Collaboration |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Fiolhais, M. C. N. Gonçalo, R. Veloso, F. Wolters, H. ATLAS Collaboration |
dc.subject.por.fl_str_mv |
Hadron-Hadron scattering (experiments) photon production proton-proton scattering QCD |
topic |
Hadron-Hadron scattering (experiments) photon production proton-proton scattering QCD |
description |
A measurement of prompt photon-pair production in proton-proton collisions at p 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 wellinstrumented region of the detector are selected. The photons are required to be isolated and have a transverse momentum of pT, 1(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-leadingorder 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. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-11 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10316/105002 http://hdl.handle.net/10316/105002 https://doi.org/10.1007/JHEP11(2021)169 |
url |
http://hdl.handle.net/10316/105002 https://doi.org/10.1007/JHEP11(2021)169 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Springer Nature |
publisher.none.fl_str_mv |
Springer Nature |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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