Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/115014
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Type: Journal article
Title: Measurement of the angular coefficients in Z-boson events using electron and muon pairs from data taken at √s = 8 TeV with the ATLAS detector
Other Titles: Measurement of the angular coefficients in Z-boson events using electron and muon pairs from data taken at s root=8 TeV with the ATLAS detector
Author: The, A.
Aad, G.
Abbott, B.
Abdallah, J.
Abdinov, O.
Abeloos, B.
Aben, R.
AbouZeid, O.
Abraham, N.
Abramowicz, H.
Abreu, H.
Abreu, R.
Abulaiti, Y.
Acharya, B.
Adamczyk, L.
Adams, D.
Adelman, J.
Adomeit, S.
Adye, T.
Affolder, A.
et al.
Citation: Journal of High Energy Physics, 2016; 2016(8):159-1-159-99
Publisher: Springer
Issue Date: 2016
ISSN: 1126-6708
1029-8479
Statement of
Responsibility: 
G. Aad, B. Abbott ... Paul D. Jackson … Lawrence Lee-Jr … Andreas Petridis … Martin White … et al. (ATLAS Collaboration)
Abstract: The angular distributions of Drell-Yan charged lepton pairs in the vicinity of the Z-boson mass peak probe the underlying QCD dynamics of Z-boson production. This paper presents a measurement of the complete set of angular coefficients A 0−7 describing these distributions in the Z-boson Collins-Soper frame. The data analysed correspond to 20.3 fb−1 of pp collisions at s√=8 TeV, collected by the ATLAS detector at the CERN LHC. The measurements are compared to the most precise fixed-order calculations currently available (O(α2s)) and with theoretical predictions embedded in Monte Carlo generators. The measurements are precise enough to probe QCD corrections beyond the formal accuracy of these calculations and to provide discrimination between different parton-shower models. A significant deviation from the (O(α2s)) predictions is observed for A 0 − A 2. Evidence is found for non-zero A 5,6,7, consistent with expectations.
Rights: © The Author(s) 2016. This article is published under an open access license. Please check the 'Copyright Information' section for details of this license and what re-use is permitted. If your intended use exceeds what is permitted by the license or if you are unable to locate the licence and re-use information, please contact the Rights and Permissions team.
RMID: 0030054939
DOI: 10.1007/JHEP08(2016)159
Appears in Collections:Physics publications

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