Precision measurement and interpretation of inclusive W+, W− and Z/γ∗ production cross sections with the ATLAS detector

Allbrooke, B M M, Asquith, L, Cerri, A, Chavez Barajas, C A, De Santo, A, Salvatore, F, Santoyo Castillo, I, Suruliz, K, Sutton, M R, Vivarelli, I and The ATLAS Collaboration, (2017) Precision measurement and interpretation of inclusive W+, W− and Z/γ∗ production cross sections with the ATLAS detector. European Physical Journal C, 77 (6). a367. ISSN 1434-6044

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Abstract

High-precision measurements by the ATLAS Collaboration are presented of inclusive 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|ηℓ|<2.5. Differential Z/γ∗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±pe±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.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Experimental Particle Physics Research Group
Subjects: Q Science > QC Physics
Depositing User: Billy Wichaidit
Date Deposited: 13 Jul 2017 13:26
Last Modified: 14 Jul 2017 02:55
URI: http://sro.sussex.ac.uk/id/eprint/69240

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Project NameSussex Project NumberFunderFunder Ref
ATLASG0275STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCILST/I006048/1