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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Publicado:	2013
Materias:	Differential cross section Event generators Monte Carlo models Perturbative QCD Z boson
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v720_n1-3_p32_Aad 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	paper:paper_03702693_v720_n1-3_p32_Aad
record_format	dspace
spelling	paper:paper_03702693_v720_n1-3_p32_Aad2023-06-08T15:37:11Z Measurement of angular correlations in Drell–Yan lepton pairs to probe Z/γ ⁎ boson transverse momentum at √s=7 TeV with the ATLAS detector 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 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v720_n1-3_p32_Aad 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 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
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
publishDate	2013
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v720_n1-3_p32_Aad http://hdl.handle.net/20.500.12110/paper_03702693_v720_n1-3_p32_Aad
_version_	1768542084743036928

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

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