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Scientific article
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English

Measurement of W ± and Z -boson production cross sections in pp collisions at √s = 13 TeV with the ATLAS detector

ContributorsATLAS Collaboration
Published inPhysics letters. B, vol. 759, p. 601-621
Collection
  • Open Access - SCOAP3
Publication date2016
Abstract

Measurements of the W±→ℓ±ν and Z→ℓ+ℓ− production cross sections (where ℓ±=e±,μ± ) in proton–proton collisions at s=13 TeV are presented using data recorded by the ATLAS experiment at the Large Hadron Collider, corresponding to a total integrated luminosity of 81 pb −1 . The total inclusive W± -boson production cross sections times the single-lepton-flavour branching ratios are σW+tot=11.83±0.02 (stat)±0.32 (sys)±0.25 (lumi) nb and σW−tot=8.79±0.02 (stat)±0.24 (sys)±0.18 (lumi) nb for W+ and W− , respectively. The total inclusive Z -boson production cross section times leptonic branching ratio, within the invariant mass window 66<116 GeV , is σZtot=1.981±0.007 (stat)±0.038 (sys)±0.042 (lumi) nb . The W+ , W− , and Z -boson production cross sections and cross-section ratios within a fiducial region defined by the detector acceptance are also measured. The cross-section ratios benefit from significant cancellation of experimental uncertainties, resulting in σW+fid/σW−fid=1.295±0.003 (stat)±0.010 (sys) and σW±fid/σZfid=10.31±0.04 (stat)±0.20 (sys) . Theoretical predictions, based on calculations accurate to next-to-next-to-leading order for quantum chromodynamics and to next-to-leading order for electroweak processes and which employ different parton distribution function sets, are compared to these measurements.

Citation (ISO format)
ATLAS Collaboration. Measurement of W ± and Z -boson production cross sections in pp collisions at √s = 13 TeV with the ATLAS detector. In: Physics letters. B, 2016, vol. 759, p. 601–621. doi: 10.1016/j.physletb.2016.06.023
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ISSN of the journal0370-2693
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