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Precision measurement and interpretation of inclusive W+, W- and Z/?* production cross sections with the ATLAS detector

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posted on 2023-06-09, 07:11 authored by Benedict AllbrookeBenedict Allbrooke, Lily AsquithLily Asquith, Alessandro CerriAlessandro Cerri, C A Chavez Barajas, Antonella De SantoAntonella De Santo, Fabrizio SalvatoreFabrizio Salvatore, I Santoyo Castillo, K Suruliz, Mark SuttonMark Sutton, Iacopo Vivarelli, The ATLAS Collaboration
High-precision measurements by the ATLAS Collaboration are presented of inclusive W+?l+?, and Z/?*?ll(l=e,µ) Drell–Yan production cross sections at the LHC. The data were collected in proton–proton collisions at vs=7TeV with an integrated luminosity of 4.6fb-1. Differential W+ and W- cross sections are measured in a lepton pseudorapidity range |?l|<2.5|?l|<2.5. Differential Z/?*Z/?* 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.

Funding

ATLAS; G0275; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/I006048/1

History

Publication status

  • Published

File Version

  • Published version

Journal

European Physical Journal C

ISSN

1434-6044

Publisher

Springer Verlag

Issue

6

Volume

77

Article number

a367

Department affiliated with

  • Physics and Astronomy Publications

Research groups affiliated with

  • Experimental Particle Physics Research Group Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2017-07-13

First Open Access (FOA) Date

2017-07-13

First Compliant Deposit (FCD) Date

2017-07-13

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