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

Measurements of the W±→ℓ±νW±→ℓ±ν and Z→ℓ+ℓ−Z→ℓ+ℓ− production cross sections (where ℓ±=e±,μ±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±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+W+ and W−W−, respectively. The total inclusive Z  -boson production cross section times leptonic branching ratio, within the invariant mass window 66