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

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

G. Aad, B. Abbott, J. Abdallah, O. Abdinov, B. Abeloos, R. Aben, O. S. AbouZeid, N. L. Abraham, H. Abramowicz, H. Abreu, …
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol.759, pp.601-621
10/08/2016

Abstract

Measurements of the W±??±? and Z??+?? production cross sections (where ?±=e±,?±) 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 ?W+tot=11.83±0.02 (stat)±0.32 (sys)±0.25 (lumi) nb and ?W?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<m??<116 GeV, is ?Ztot=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 ?W+fid/?W?fid=1.295±0.003 (stat)±0.010 (sys) and ?W±fid/?Zfid=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.
url
https://doi.org/10.1016/j.physletb.2016.06.023View
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