Measurement of the underlying event in jet events from 7 TeV proton–proton collisions with the ATLAS detector

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Distributions sensitive to the underlying event in QCD jet events have been measured with the ATLAS detector at the LHC, based on (Formula presented.) of proton–proton collision data collected at a centre-of-mass energy of 7 (Formula presented.). Charged-particle mean (Formula presented.) and densit...

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Autor principal: The ATLAS Collaboration
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_14346044_v74_n8_p1_TheATLASCollaboration
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_14346044_v74_n8_p1_TheATLASCollaboration
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spelling todo:paper_14346044_v74_n8_p1_TheATLASCollaboration2023-10-03T16:15:00Z Measurement of the underlying event in jet events from 7 TeV proton–proton collisions with the ATLAS detector The ATLAS Collaboration Distributions sensitive to the underlying event in QCD jet events have been measured with the ATLAS detector at the LHC, based on (Formula presented.) of proton–proton collision data collected at a centre-of-mass energy of 7 (Formula presented.). Charged-particle mean (Formula presented.) and densities of all-particle (Formula presented.) and charged-particle multiplicity and (Formula presented.) have been measured in regions azimuthally transverse to the hardest jet in each event. These are presented both as one-dimensional distributions and with their mean values as functions of the leading-jet transverse momentum from 20 to 800 (Formula presented.). The correlation of charged-particle mean (Formula presented.) with charged-particle multiplicity is also studied, and the (Formula presented.) densities include the forward rapidity region; these features provide extra data constraints for Monte Carlo modelling of colour reconnection and beam-remnant effects respectively. For the first time, underlying event observables have been computed separately for inclusive jet and exclusive dijet event selections, allowing more detailed study of the interplay of multiple partonic scattering and QCD radiation contributions to the underlying event. Comparisons to the predictions of different Monte Carlo models show a need for further model tuning, but the standard approach is found to generally reproduce the features of the underlying event in both types of event selection. © 2014, 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_14346044_v74_n8_p1_TheATLASCollaboration
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Distributions sensitive to the underlying event in QCD jet events have been measured with the ATLAS detector at the LHC, based on (Formula presented.) of proton–proton collision data collected at a centre-of-mass energy of 7 (Formula presented.). Charged-particle mean (Formula presented.) and densities of all-particle (Formula presented.) and charged-particle multiplicity and (Formula presented.) have been measured in regions azimuthally transverse to the hardest jet in each event. These are presented both as one-dimensional distributions and with their mean values as functions of the leading-jet transverse momentum from 20 to 800 (Formula presented.). The correlation of charged-particle mean (Formula presented.) with charged-particle multiplicity is also studied, and the (Formula presented.) densities include the forward rapidity region; these features provide extra data constraints for Monte Carlo modelling of colour reconnection and beam-remnant effects respectively. For the first time, underlying event observables have been computed separately for inclusive jet and exclusive dijet event selections, allowing more detailed study of the interplay of multiple partonic scattering and QCD radiation contributions to the underlying event. Comparisons to the predictions of different Monte Carlo models show a need for further model tuning, but the standard approach is found to generally reproduce the features of the underlying event in both types of event selection. © 2014, The Author(s).
format JOUR
author The ATLAS Collaboration
spellingShingle The ATLAS Collaboration
Measurement of the underlying event in jet events from 7 TeV proton–proton collisions with the ATLAS detector
author_facet The ATLAS Collaboration
author_sort The ATLAS Collaboration
title Measurement of the underlying event in jet events from 7 TeV proton–proton collisions with the ATLAS detector
title_short Measurement of the underlying event in jet events from 7 TeV proton–proton collisions with the ATLAS detector
title_full Measurement of the underlying event in jet events from 7 TeV proton–proton collisions with the ATLAS detector
title_fullStr Measurement of the underlying event in jet events from 7 TeV proton–proton collisions with the ATLAS detector
title_full_unstemmed Measurement of the underlying event in jet events from 7 TeV proton–proton collisions with the ATLAS detector
title_sort measurement of the underlying event in jet events from 7 tev proton–proton collisions with the atlas detector
url http://hdl.handle.net/20.500.12110/paper_14346044_v74_n8_p1_TheATLASCollaboration
work_keys_str_mv AT theatlascollaboration measurementoftheunderlyingeventinjeteventsfrom7tevprotonprotoncollisionswiththeatlasdetector
_version_ 1782029904566550528

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