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Measurement of the W±Z boson pair-production cross section in pp collisions at ?s=13 TeV with the ATLAS detector
Journal article   Open access   Peer reviewed

Measurement of the W±Z boson pair-production cross section in pp collisions at ?s=13 TeV with the ATLAS detector

M. Aaboud, G. Aad, B. Abbott, J. Abdallah, O. Abdinov, B. Abeloos, R. Aben, O.S. Abouzeid, N.L. Abraham, H. Abramowicz, …
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol.762, pp.1-22
2016
DOI: https://doi.org/10.1016/j.physletb.2016.08.052
Appears in  keyword about Physics

Abstract

The production of W ± Z events in proton–proton collisions at a centre-of-mass energy of 13 TeV is measured with the ATLAS detector at the LHC. The collected data correspond to an integrated luminosity of 3.2 fb −1 . The W ± Z candidates are reconstructed using leptonic decays of the gauge bosons into electrons or muons. The measured inclusive cross section in the detector fiducial region for leptonic decay modes is σ fid. W±Z→ℓʹ νℓℓ =63.2 ±3.2 (stat.)±2.6 (sys.)±1.5 (lumi.)fb. In comparison, the next-to-leading-order Standard Model prediction is 53.4 +3.6 −2.8 fb. The extrapolation of the measurement from the fiducial to the total phase space yields σ tot. W±Z =50.6 ±2.6 (stat.)±2.0 (sys.)±0.9 (th.)±1.2 (lumi.)pb, in agreement with a recent next-to-next-to-leading-order calculation of 48.2 +1.1 −1.0 pb. The cross section as a function of jet multiplicity is also measured, together with the charge-dependent W + Z and W − Z cross sections and their ratio.
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https://doi.org/10.1016/j.physletb.2016.08.052View
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