Measurement of the ZZ Production Cross Section in pp Collisions at root s=13 TeV with the ATLAS Detector



Aad, G, Abbott, B, Abdallah, J, Abdinov, O, Abeloos, B, Aben, R, Abolins, M, AbouZeid, OS, Abramowicz, H, Abreu, H
et al (show 2841 more authors) (2016) Measurement of the ZZ Production Cross Section in pp Collisions at root s=13 TeV with the ATLAS Detector. PHYSICAL REVIEW LETTERS, 116 (10). 1-.

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Abstract

The production of $W^{\pm}Z$ 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 $W^{\pm}Z$ 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 $\sigma_{W^\pm Z \rightarrow \ell^{'} \nu \ell \ell}^{\textrm{fid.}} = 63.2 \pm 3.2$ (stat.) $\pm 2.6$ (sys.) $\pm 1.5$ (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 $\sigma_{W^{\pm}Z}^{\textrm{tot.}} = 50.6 \pm 2.6$ (stat.) $\pm 2.0$ (sys.) $\pm 0.9$ (th.) $\pm 1.2$ (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.

Item Type: Article
Additional Information: 21 pages plus author list + cover pages (39 pages total), 4 figures, 4 tables, published in Phys. Lett. B. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2015-19
Uncontrolled Keywords: electroweak interaction, particle production, W & Z bosons
Depositing User: Symplectic Admin
Date Deposited: 27 Mar 2017 14:50
Last Modified: 16 Mar 2024 00:20
DOI: 10.1103/PhysRevLett.116.101801
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3006013