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Title: Measurement of W ± and Z-boson production cross sections in pp collisions at s = 13  TeV with the ATLAS detector

Measurements of the W ± → ℓ ±ν and Z → ℓ +- production cross sections (where ℓ ± = e ±, μ ± ) in proton–proton collisions at √s = 13 TeV are presented using data recorded by the ATLAS experiment at the Large Hadron Collider, corresponding to a total integrated luminosity of 81 pb -1. The total inclusive W ±-boson production cross sections times the single-lepton-flavour branching ratios are σ$$tot\atop{W+}$$ =11.83 ± 0.02 (stat)±0.32 (sys)±0.25 (lumi) nb and σ$$tot\atop{W-}$$=8.79±0.02 (stat)±0.24 (sys)±0.18 (lumi) nb for W + and W -, respectively. The total inclusive Z-boson production cross section times leptonic branching ratio, within the invariant mass window 66 < m ℓℓ <116 GeV, is σ$$tot\atop{Z}$$ = 1.981±0.007(stat)±0.038(sys)±0.042(lumi) nb. The W +, W , and Z-boson production cross sections and cross-section ratios within a fiducial region defined by the detector acceptance are also measured. The cross-section ratios benefit from significant cancellation of experimental uncertainties, resulting in σ$$fid\atop{W+}$$/$$fid\atop{W-}$$ = 1.295 ±0.003(stat)±0.010(sys)and σ$$fid\atop{W±}$$/σ$$fid\atop{Z}$$ = 10.31±0.04(stat)±0.20(sys). Theoretical predictions, based on calculations accurate to next-to-next-to-leading order for quantum chromodynamics and to next-to-leading order for electroweak processes and which employ different parton distribution function sets, are compared to these measurements.
Authors:
 [1]
  1. CPPM, Aix-Marseille Univ. and CNRS/IN2P3, Marseille (France). et al.
Publication Date:
Grant/Contract Number:
AC02-76SF00515; AC02-05CH11231
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 759; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
The ATLAS Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1257865
Alternate Identifier(s):
OSTI ID: 1261157; OSTI ID: 1379560