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Abstract:

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

Registro:

Documento: Artículo
Título:Measurement of angular correlations in Drell–Yan lepton pairs to probe Z/γ ⁎ boson transverse momentum at √s=7 TeV with the ATLAS detector
Autor:Aad, G. et al.
Este artículo contiene 2893 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2893 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Palabras clave:Differential cross section; Event generators; Monte Carlo models; Perturbative QCD; Z boson
Año:2013
Volumen:720
Número:1-3
Página de inicio:32
Página de fin:51
DOI: http://dx.doi.org/10.1016/j.physletb.2013.01.054
Título revista:Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Título revista abreviado:Phys Lett Sect B Nucl Elem Part High-Energy Phys
ISSN:03702693
CODEN:PYLBA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v720_n1-3_p32_Aad

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Citas:

---------- APA ----------
(2013) . Measurement of angular correlations in Drell–Yan lepton pairs to probe Z/γ ⁎ boson transverse momentum at √s=7 TeV with the ATLAS detector. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 720(1-3), 32-51.
http://dx.doi.org/10.1016/j.physletb.2013.01.054
---------- CHICAGO ----------
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" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 720, no. 1-3 (2013) : 32-51.
http://dx.doi.org/10.1016/j.physletb.2013.01.054
---------- MLA ----------
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" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 720, no. 1-3, 2013, pp. 32-51.
http://dx.doi.org/10.1016/j.physletb.2013.01.054
---------- VANCOUVER ----------
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. Phys Lett Sect B Nucl Elem Part High-Energy Phys. 2013;720(1-3):32-51.
http://dx.doi.org/10.1016/j.physletb.2013.01.054