Measurement of the tt¯ γ production cross section in proton-proton collisions at √s=8 TeV with the ATLAS detector

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The cross section of a top-quark pair produced in association with a photon is measured in proton-proton collisions at a centre-of-mass energy of s=8 TeV with 20.2 fb −1 of data collected by the ATLAS detector at the Large Hadron Collider in 2012. The measurement is performed by selecting events tha...

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Autor principal: The ATLAS collaboration
Formato: JOUR
Materias:
Hadron-Hadron scattering (experiments)
Top physics
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_11266708_v2017_n11_p_TheATLAScollaboration
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_11266708_v2017_n11_p_TheATLAScollaboration
record_format dspace
spelling todo:paper_11266708_v2017_n11_p_TheATLAScollaboration2023-10-03T16:07:32Z Measurement of the tt¯ γ production cross section in proton-proton collisions at √s=8 TeV with the ATLAS detector The ATLAS collaboration Hadron-Hadron scattering (experiments) Top physics The cross section of a top-quark pair produced in association with a photon is measured in proton-proton collisions at a centre-of-mass energy of s=8 TeV with 20.2 fb −1 of data collected by the ATLAS detector at the Large Hadron Collider in 2012. The measurement is performed by selecting events that contain a photon with transverse momentum p T > 15 GeV, an isolated lepton with large transverse momentum, large missing transverse momentum, and at least four jets, where at least one is identified as originating from a b-quark. The production cross section is measured in a fiducial region close to the selection requirements. It is found to be 139 ± 7 (stat.) ± 17 (syst.) fb, in good agreement with the theoretical prediction at next-to-leading order of 151 ± 24 fb. In addition, differential cross sections in the fiducial region are measured as a function of the transverse momentum and pseudorapidity of the photon.[Figure not available: see fulltext.]. © 2017, The Author(s). JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_11266708_v2017_n11_p_TheATLAScollaboration
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 (experiments)
Top physics
spellingShingle Hadron-Hadron scattering (experiments)
Top physics
The ATLAS collaboration
Measurement of the tt¯ γ production cross section in proton-proton collisions at √s=8 TeV with the ATLAS detector
topic_facet Hadron-Hadron scattering (experiments)
Top physics
description The cross section of a top-quark pair produced in association with a photon is measured in proton-proton collisions at a centre-of-mass energy of s=8 TeV with 20.2 fb −1 of data collected by the ATLAS detector at the Large Hadron Collider in 2012. The measurement is performed by selecting events that contain a photon with transverse momentum p T > 15 GeV, an isolated lepton with large transverse momentum, large missing transverse momentum, and at least four jets, where at least one is identified as originating from a b-quark. The production cross section is measured in a fiducial region close to the selection requirements. It is found to be 139 ± 7 (stat.) ± 17 (syst.) fb, in good agreement with the theoretical prediction at next-to-leading order of 151 ± 24 fb. In addition, differential cross sections in the fiducial region are measured as a function of the transverse momentum and pseudorapidity of the photon.[Figure not available: see fulltext.]. © 2017, The Author(s).
format JOUR
author The ATLAS collaboration
author_facet The ATLAS collaboration
author_sort The ATLAS collaboration
title Measurement of the tt¯ γ production cross section in proton-proton collisions at √s=8 TeV with the ATLAS detector
title_short Measurement of the tt¯ γ production cross section in proton-proton collisions at √s=8 TeV with the ATLAS detector
title_full Measurement of the tt¯ γ production cross section in proton-proton collisions at √s=8 TeV with the ATLAS detector
title_fullStr Measurement of the tt¯ γ production cross section in proton-proton collisions at √s=8 TeV with the ATLAS detector
title_full_unstemmed Measurement of the tt¯ γ production cross section in proton-proton collisions at √s=8 TeV with the ATLAS detector
title_sort measurement of the tt¯ γ production cross section in proton-proton collisions at √s=8 tev with the atlas detector
url http://hdl.handle.net/20.500.12110/paper_11266708_v2017_n11_p_TheATLAScollaboration
work_keys_str_mv AT theatlascollaboration measurementofthettgproductioncrosssectioninprotonprotoncollisionsats8tevwiththeatlasdetector
_version_ 1807316086724493312

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