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, Torsten Åkesson, Simona Bocchetta, LENE BRYNGEMARK, Caterina Doglioni, Anders Floderus, Vincent Hedberg, Göran Jarlskog, Else Lytken, Ulf Mjörnmark, Oxana Smirnova, Oleksandr Viazlo, ATLAS Collaboration

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Sammanfattning

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 σfid.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+3.6−2.8fb. The extrapolation of the measurement from the fiducial to the total phase space yields σtot.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+1.1−1.0pb. 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. © 2016 The Author(s).
Originalspråkengelska
Sidor (från-till)1-22
Antal sidor22
TidskriftPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volym762
DOI
StatusPublished - 2016

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Cited By :4

Export Date: 20 July 2017

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