Precision measurement and interpretation of inclusive W+, W- and Z/gamma* production cross sections with the ATLAS detector
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
High-precision measurements by the ATLAS Collaboration are presented of inclusive W+→ℓ+ν, W−→ℓ−ν¯ and Z/γ∗→ℓℓ (ℓ=e,μ) Drell–Yan production cross sections at the LHC. The data were collected in proton–proton collisions at s√=7TeV with an integrated luminosity of 4.6fb−1. Differential W+ and W− cross sections are measured in a lepton pseudorapidity range |ηℓ|<2.5. Differential Z/γ∗ cross sections are measured as a function of the absolute dilepton rapidity, for |yℓℓ|<3.6, for three intervals of dilepton mass, mℓℓ, extending from 46 to 150GeV. The integrated and differential electron- and muon-channel cross sections are combined and compared to theoretical predictions using recent sets of parton distribution functions. The data, together with the final inclusive e±p scattering cross-section data from H1 and ZEUS, are interpreted in a next-to-next-to-leading-order QCD analysis, and a new set of parton distribution functions, ATLAS-epWZ16, is obtained. The ratio of strange-to-light sea-quark densities in the proton is determined more accurately than in previous determinations based on collider data only, and is established to be close to unity in the sensitivity range of the data. A new measurement of the CKM matrix element |Vcs| is also provided.
Date Issued
2017-06-02
Date Acceptance
2017-05-11
Citation
EUROPEAN PHYSICAL JOURNAL C, 2017, 77 (6)
ISSN
1434-6044
Publisher
SPRINGER
Journal / Book Title
EUROPEAN PHYSICAL JOURNAL C
Volume
77
Issue
6
Copyright Statement
© 2017 CERN for the benefit of the ATLAS collaboration. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000402676800003&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Physics, Particles & Fields
Physics
DEEP-INELASTIC SCATTERING
PARTON DISTRIBUTIONS
QCD ANALYSIS
MONTE-CARLO
DRELL-YAN
HADRON COLLIDERS
EP SCATTERING
LHC
HERA
COMBINATION
Publication Status
Published
Article Number
ARTN 367
Date Publish Online
2017-06-02