Measurement of W±-boson and Z-boson production cross-sections in pp collisions at √s = 2.76 TeV with the ATLAS detector

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Authors

Colleges, School and Institutes

Abstract

The production cross-sections for W ± and Z bosons are measured using ATLAS data corresponding to an integrated luminosity of 4.0 pb - 1 collected at a centre-of-mass energy s=2.76 TeV. The decay channels W→ ℓν and Z→ ℓℓ are used, where ℓ can be an electron or a muon. The cross-sections are presented for a fiducial region defined by the detector acceptance and are also extrapolated to the full phase space for the total inclusive production cross-section. The combined (average) total inclusive cross-sections for the electron and muon channels are: σW+→ℓνtot=2312±26(stat.)±27(syst.)±72(lumi.)±30(extr.)pb,σW-→ℓνtot=1399±21(stat.)±17(syst.)±43(lumi.)±21(extr.)pb,σZ→ℓℓtot=323.4±9.8(stat.)±5.0(syst.)±10.0(lumi.)±5.5(extr.)pb.Measured ratios and asymmetries constructed using these cross-sections are also presented. These observables benefit from full or partial cancellation of many systematic uncertainties that are correlated between the different measurements.

Bibliographic note

All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2018-06/

Details

Original languageEnglish
Article number901
Number of pages29
JournalEuropean Physical Journal C
Volume79
Issue number11
Early online date8 Nov 2019
Publication statusE-pub ahead of print - 8 Nov 2019

Keywords

  • hep-ex