Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector

Detalhes bibliográficos
Autor(a) principal: Fiolhais, M. C. N.
Data de Publicação: 2021
Outros Autores: Gonçalo, R., Veloso, F., Wolters, H., ATLAS Collaboration
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/105002
https://doi.org/10.1007/JHEP11(2021)169
Resumo: 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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spelling 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
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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