Measurement of event-shape observables in Z → ℓ + ℓ − events in pp collisions at √ s = 7 TeV with the ATLAS detector at the LHC

Event-shape observables measured using charged particles in inclusive Z-boson events are presented, using the electron and muon decay modes of the Z bosons. The measurements are based on an integrated luminosity of 1.1 fb−1 of proton-proton collisions recorded by the ATLAS detector at theLHCat a cen...

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Autor principal: ATLAS Collaboration
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Acceso en línea:http://hdl.handle.net/20.500.12110/paper_14346044_v76_n7_p374_ATLASCollaboration
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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_14346044_v76_n7_p374_ATLASCollaboration2023-10-03T16:15:17Z Measurement of event-shape observables in Z → ℓ + ℓ − events in pp collisions at √ s = 7 TeV with the ATLAS detector at the LHC ATLAS Collaboration Event-shape observables measured using charged particles in inclusive Z-boson events are presented, using the electron and muon decay modes of the Z bosons. The measurements are based on an integrated luminosity of 1.1 fb−1 of proton-proton collisions recorded by the ATLAS detector at theLHCat a centre-of-mass energy √ s = 7TeV.Chargedparticle distributions, excluding the lepton-antilepton pair from the Z-boson decay, are measured in different ranges of transverse momentum of the Z boson. Distributions include multiplicity, scalar sum of transverse momenta, beam thrust, transverse thrust, spherocity, and F-parameter, which are in particular sensitive to properties of the underlying event at small values of the Z-boson transverse momentum. The measured observables are compared with predictions from Pythia 8, Sherpa, and Herwig7. Typically, all three Monte Carlo generators provide predictions that are in better agreement with the data at high Z-boson transverse momenta than at low Z-boson transverse momenta, and for the observables that are less sensitive to the number of charged particles in the event. © CERN for the benefit of the ATLAS collaboration 2016. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_14346044_v76_n7_p374_ATLASCollaboration
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Event-shape observables measured using charged particles in inclusive Z-boson events are presented, using the electron and muon decay modes of the Z bosons. The measurements are based on an integrated luminosity of 1.1 fb−1 of proton-proton collisions recorded by the ATLAS detector at theLHCat a centre-of-mass energy √ s = 7TeV.Chargedparticle distributions, excluding the lepton-antilepton pair from the Z-boson decay, are measured in different ranges of transverse momentum of the Z boson. Distributions include multiplicity, scalar sum of transverse momenta, beam thrust, transverse thrust, spherocity, and F-parameter, which are in particular sensitive to properties of the underlying event at small values of the Z-boson transverse momentum. The measured observables are compared with predictions from Pythia 8, Sherpa, and Herwig7. Typically, all three Monte Carlo generators provide predictions that are in better agreement with the data at high Z-boson transverse momenta than at low Z-boson transverse momenta, and for the observables that are less sensitive to the number of charged particles in the event. © CERN for the benefit of the ATLAS collaboration 2016.
format JOUR
author ATLAS Collaboration
spellingShingle ATLAS Collaboration
Measurement of event-shape observables in Z → ℓ + ℓ − events in pp collisions at √ s = 7 TeV with the ATLAS detector at the LHC
author_facet ATLAS Collaboration
author_sort ATLAS Collaboration
title Measurement of event-shape observables in Z → ℓ + ℓ − events in pp collisions at √ s = 7 TeV with the ATLAS detector at the LHC
title_short Measurement of event-shape observables in Z → ℓ + ℓ − events in pp collisions at √ s = 7 TeV with the ATLAS detector at the LHC
title_full Measurement of event-shape observables in Z → ℓ + ℓ − events in pp collisions at √ s = 7 TeV with the ATLAS detector at the LHC
title_fullStr Measurement of event-shape observables in Z → ℓ + ℓ − events in pp collisions at √ s = 7 TeV with the ATLAS detector at the LHC
title_full_unstemmed Measurement of event-shape observables in Z → ℓ + ℓ − events in pp collisions at √ s = 7 TeV with the ATLAS detector at the LHC
title_sort measurement of event-shape observables in z → ℓ + ℓ − events in pp collisions at √ s = 7 tev with the atlas detector at the lhc
url http://hdl.handle.net/20.500.12110/paper_14346044_v76_n7_p374_ATLASCollaboration
work_keys_str_mv AT atlascollaboration measurementofeventshapeobservablesinzlleventsinppcollisionsats7tevwiththeatlasdetectoratthelhc
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