Measurement of angular correlations in Drell–Yan lepton pairs to probe Z/γ ⁎ boson transverse momentum at √s=7 TeV with the ATLAS detector

A measurement of angular correlations in Drell–Yan lepton pairs via the ϕ η ⁎ observable is presented. This variable probes the same physics as the Z/γ ⁎ boson transverse momentum with a better experimental resolution. The Z/γ ⁎ →e + e − and Z/γ ⁎ →μ + μ − decays produced in proton–proton collisions...

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Autor principal: Aad, G.
Formato: JOUR
Materias:
Differential cross section
Event generators
Monte Carlo models
Perturbative QCD
Z boson
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03702693_v720_n1-3_p32_Aad
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_03702693_v720_n1-3_p32_Aad
record_format dspace
spelling todo:paper_03702693_v720_n1-3_p32_Aad2023-10-03T15:29:29Z Measurement of angular correlations in Drell–Yan lepton pairs to probe Z/γ ⁎ boson transverse momentum at √s=7 TeV with the ATLAS detector Aad, G. Differential cross section Event generators Monte Carlo models Perturbative QCD Z boson A measurement of angular correlations in Drell–Yan lepton pairs via the ϕ η ⁎ observable is presented. This variable probes the same physics as the Z/γ ⁎ boson transverse momentum with a better experimental resolution. The Z/γ ⁎ →e + e − and Z/γ ⁎ →μ + μ − decays produced in proton–proton collisions at a centre-of-mass energy of sqrts=7 TeV are used. The data were collected with the ATLAS detector at the LHC and correspond to an integrated luminosity of 4.6 fb −1 . Normalised differential cross sections as a function of ϕ η ⁎ are measured separately for electron and muon decay channels. These channels are then combined for improved accuracy. The cross section is also measured double differentially as a function of ϕ η ⁎ for three independent bins of the Z boson rapidity. The results are compared to QCD calculations and to predictions from different Monte Carlo event generators. The data are reasonably well described, in all measured Z boson rapidity regions, by resummed QCD predictions combined with fixed-order perturbative QCD calculations or by some Monte Carlo event generators. The measurement precision is typically better by one order of magnitude than present theoretical uncertainties. © 2013 CERN JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03702693_v720_n1-3_p32_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 Differential cross section
Event generators
Monte Carlo models
Perturbative QCD
Z boson
spellingShingle Differential cross section
Event generators
Monte Carlo models
Perturbative QCD
Z boson
Aad, G.
Measurement of angular correlations in Drell–Yan lepton pairs to probe Z/γ ⁎ boson transverse momentum at √s=7 TeV with the ATLAS detector
topic_facet Differential cross section
Event generators
Monte Carlo models
Perturbative QCD
Z boson
description A measurement of angular correlations in Drell–Yan lepton pairs via the ϕ η ⁎ observable is presented. This variable probes the same physics as the Z/γ ⁎ boson transverse momentum with a better experimental resolution. The Z/γ ⁎ →e + e − and Z/γ ⁎ →μ + μ − decays produced in proton–proton collisions at a centre-of-mass energy of sqrts=7 TeV are used. The data were collected with the ATLAS detector at the LHC and correspond to an integrated luminosity of 4.6 fb −1 . Normalised differential cross sections as a function of ϕ η ⁎ are measured separately for electron and muon decay channels. These channels are then combined for improved accuracy. The cross section is also measured double differentially as a function of ϕ η ⁎ for three independent bins of the Z boson rapidity. The results are compared to QCD calculations and to predictions from different Monte Carlo event generators. The data are reasonably well described, in all measured Z boson rapidity regions, by resummed QCD predictions combined with fixed-order perturbative QCD calculations or by some Monte Carlo event generators. The measurement precision is typically better by one order of magnitude than present theoretical uncertainties. © 2013 CERN
format JOUR
author Aad, G.
author_facet Aad, G.
author_sort Aad, G.
title Measurement of angular correlations in Drell–Yan lepton pairs to probe Z/γ ⁎ boson transverse momentum at √s=7 TeV with the ATLAS detector
title_short Measurement of angular correlations in Drell–Yan lepton pairs to probe Z/γ ⁎ boson transverse momentum at √s=7 TeV with the ATLAS detector
title_full Measurement of angular correlations in Drell–Yan lepton pairs to probe Z/γ ⁎ boson transverse momentum at √s=7 TeV with the ATLAS detector
title_fullStr Measurement of angular correlations in Drell–Yan lepton pairs to probe Z/γ ⁎ boson transverse momentum at √s=7 TeV with the ATLAS detector
title_full_unstemmed Measurement of angular correlations in Drell–Yan lepton pairs to probe Z/γ ⁎ boson transverse momentum at √s=7 TeV with the ATLAS detector
title_sort measurement of angular correlations in drell–yan lepton pairs to probe z/γ ⁎ boson transverse momentum at √s=7 tev with the atlas detector
url http://hdl.handle.net/20.500.12110/paper_03702693_v720_n1-3_p32_Aad
work_keys_str_mv AT aadg measurementofangularcorrelationsindrellyanleptonpairstoprobezgbosontransversemomentumats7tevwiththeatlasdetector
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