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

Allbrooke, Benedict, Asquith, Lily, Cerri, Alessandro, Chavez Barajas, Carlos, De Santo, Antonella, Potter, Tina, Salvatore, Fabrizio, Santoyo Castillo, Itzebelt, Suruliz, Kerim, Sutton, Mark, Vivarelli, Iacopo and The Atlas Collaboration, et al. (2016) Measurement of the W±Z boson pair-production cross section in pp collisions at sqrt(s) = 13TeV with the ATLAS detector. Physics Letters B, 762. pp. 1-22. ISSN 0370-2693

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Abstract

The production of W±ZW±Z events in proton–proton collisions at a centre-of-mass energy of 13 TeV13 TeV is measured with the ATLAS detector at the LHC. The collected data correspond to an integrated luminosity of 3.2 fb−13.2 fb−1. The W±ZW±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 View the MathML sourceσW±Z→ℓ′νℓℓfid.=63.2±3.2(stat.)±2.6(sys.)±1.5(lumi.) fb. In comparison, the next-to-leading-order Standard Model prediction is View the MathML source53.4−2.8+3.6 fb. The extrapolation of the measurement from the fiducial to the total phase space yields View the MathML sourceσW±Ztot.=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 View the MathML source48.2−1.0+1.1 pb. The cross section as a function of jet multiplicity is also measured, together with the charge-dependent W+ZW+Z and W−ZW−Z cross sections and their ratio.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Experimental Particle Physics Research Group
Subjects: Q Science > QC Physics
Depositing User: Richard Chambers
Date Deposited: 01 Nov 2016 12:13
Last Modified: 06 Mar 2017 15:25
URI: http://sro.sussex.ac.uk/id/eprint/65198

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