Measurement of isolated-photon pair production in pp collisions at √s=7TeV with the ATLAS detector

The ATLAS experiment at the LHC has measured the production cross section of events with two isolated photons in the final state, in proton-proton collisions at √s=7TeV . The full data set collected in 2011, corresponding to an integrated luminosity of 4.9 fb -1 , is used. The amount of background,...

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Autor principal: Aad, G.
Formato: JOUR
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Hadron-Hadron Scattering
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_11266708_v2013_n1_p_Aad
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_11266708_v2013_n1_p_Aad2023-10-03T16:06:57Z Measurement of isolated-photon pair production in pp collisions at √s=7TeV with the ATLAS detector Aad, G. Hadron-Hadron Scattering The ATLAS experiment at the LHC has measured the production cross section of events with two isolated photons in the final state, in proton-proton collisions at √s=7TeV . The full data set collected in 2011, corresponding to an integrated luminosity of 4.9 fb -1 , is used. The amount of background, from hadronic jets and isolated electrons, is estimated with data-driven techniques and subtracted. The total cross section, for two isolated photons with transverse energies above 25 GeV and 22 GeV respectively, in the acceptance of the electromagnetic calorimeter (|η| < 1.37 and 1.52 < |η| < 2.37) and with an angular separation ΔR > 0.4, is 44.0 -4.2 +3.2 pb. The differential cross sections as a function of the di-photon invariant mass, transverse momentum, azimuthal separation, and cosine of the polar angle of the largest transverse energy photon in the Collins-Soper di-photon rest frame are also measured. The results are compared to the prediction of leading-order parton-shower and next-to-leading-order and next-to-next-to-leading-order parton-level generators.[Figure not available: see fulltext.] © 2013 CERN for the benefit of the ATLAS collaboration. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_11266708_v2013_n1_p_Aad
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Hadron-Hadron Scattering
spellingShingle Hadron-Hadron Scattering
Aad, G.
Measurement of isolated-photon pair production in pp collisions at √s=7TeV with the ATLAS detector
topic_facet Hadron-Hadron Scattering
description The ATLAS experiment at the LHC has measured the production cross section of events with two isolated photons in the final state, in proton-proton collisions at √s=7TeV . The full data set collected in 2011, corresponding to an integrated luminosity of 4.9 fb -1 , is used. The amount of background, from hadronic jets and isolated electrons, is estimated with data-driven techniques and subtracted. The total cross section, for two isolated photons with transverse energies above 25 GeV and 22 GeV respectively, in the acceptance of the electromagnetic calorimeter (|η| < 1.37 and 1.52 < |η| < 2.37) and with an angular separation ΔR > 0.4, is 44.0 -4.2 +3.2 pb. The differential cross sections as a function of the di-photon invariant mass, transverse momentum, azimuthal separation, and cosine of the polar angle of the largest transverse energy photon in the Collins-Soper di-photon rest frame are also measured. The results are compared to the prediction of leading-order parton-shower and next-to-leading-order and next-to-next-to-leading-order parton-level generators.[Figure not available: see fulltext.] © 2013 CERN for the benefit of the ATLAS collaboration.
format JOUR
author Aad, G.
author_facet Aad, G.
author_sort Aad, G.
title Measurement of isolated-photon pair production in pp collisions at √s=7TeV with the ATLAS detector
title_short Measurement of isolated-photon pair production in pp collisions at √s=7TeV with the ATLAS detector
title_full Measurement of isolated-photon pair production in pp collisions at √s=7TeV with the ATLAS detector
title_fullStr Measurement of isolated-photon pair production in pp collisions at √s=7TeV with the ATLAS detector
title_full_unstemmed Measurement of isolated-photon pair production in pp collisions at √s=7TeV with the ATLAS detector
title_sort measurement of isolated-photon pair production in pp collisions at √s=7tev with the atlas detector
url http://hdl.handle.net/20.500.12110/paper_11266708_v2013_n1_p_Aad
work_keys_str_mv AT aadg measurementofisolatedphotonpairproductioninppcollisionsats7tevwiththeatlasdetector
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