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

The ATLAS Collaboration

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    Abstract

    Measurements of the W�→ℓ�ν and Z→ℓ+ production cross sections (where ℓ�=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 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<mℓℓ<116�GeV, is σZ tot=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+ fidW fid=1.295�0.003�(stat)�0.010�(sys) and σW� fidZ fid=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.

    Original languageEnglish
    Pages (from-to)601-621
    Number of pages21
    JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
    Volume759
    DOIs
    Publication statusPublished - 2016 Aug 10

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    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

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