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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Publicado: 2016
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v76_n7_p374_ATLASCollaboration
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
id paper:paper_14346044_v76_n7_p374_ATLASCollaboration
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spelling paper:paper_14346044_v76_n7_p374_ATLASCollaboration2023-06-08T16:15:13Z 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 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. 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v76_n7_p374_ATLASCollaboration 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.
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
spellingShingle 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
publishDate 2016
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v76_n7_p374_ATLASCollaboration
http://hdl.handle.net/20.500.12110/paper_14346044_v76_n7_p374_ATLASCollaboration
_version_ 1768546459056078848

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