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 at a...

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Autores principales:	Anduaga, Xabier Sebastián, Dova, María Teresa, Monticelli, Fernando Gabriel, Tripiana, Martín F., The ATLAS Collaboration
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2013
Materias:	Ciencias Exactas Z boson Differential cross section Perturbative QCD Event generators Monte Carlo models Física
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/77566
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-77566
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Exactas Z boson Differential cross section Perturbative QCD Event generators Monte Carlo models Física
spellingShingle	Ciencias Exactas Z boson Differential cross section Perturbative QCD Event generators Monte Carlo models Física Anduaga, Xabier Sebastián Dova, María Teresa Monticelli, Fernando Gabriel Tripiana, Martín F. The ATLAS Collaboration 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	Ciencias Exactas Z boson Differential cross section Perturbative QCD Event generators Monte Carlo models Física
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 √s = 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 <math xmlns="http://www.w3.org/1998/Math/MathML"><msubsup is="true"><mrow is="true"><mi is="true">ϕ</mi></mrow><mrow is="true"><mi is="true">η</mi></mrow> <mrow is="true"><mo is="true">⁎</mo></mrow></msubsup></math> 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 <math xmlns="http://www.w3.org/1998/Math/MathML"><msubsup is="true"><mrow is="true"> <mi is="true">ϕ</mi></mrow><mrow is="true"><mi is="true">η</mi></mrow> <mrow is="true"><mo is="true">⁎</mo></mrow></msubsup></math> 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.
format	Articulo Articulo
author	Anduaga, Xabier Sebastián Dova, María Teresa Monticelli, Fernando Gabriel Tripiana, Martín F. The ATLAS Collaboration
author_facet	Anduaga, Xabier Sebastián Dova, María Teresa Monticelli, Fernando Gabriel Tripiana, Martín F. The ATLAS Collaboration
author_sort	Anduaga, Xabier Sebastián
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	http://sedici.unlp.edu.ar/handle/10915/77566
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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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