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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Colleges, School and Institutes
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.
|Number of pages||29|
|Journal||European Physical Journal C|
|Early online date||8 Nov 2019|
|Publication status||E-pub ahead of print - 8 Nov 2019|