Measurements of inclusive and associated jet W and Z production with the ATLAS detector

The productions of the W+- and Z bosons are standard candle processes at the Large Hadron Collider (LHC). Precise total and differential cross section measurements are presented. The results are compared to Monte Carlo simulations and to predictions computed at high-order quantum-chromo-dynamics (QCD) for different sets of parton distribution functions (PDFs). A measurement of angular correlations in Drell-Yan lepton pairs for neutral current process via the phi*_eta observable is also presented. This variable probes the same physics as the Z/gamma* boson transverse momentum pT with a better experimental resolution. The measurement using phi*_eta and the direct measurement of vector boson pT are compared to predictions based on QCD calculations and predictions from different Monte Carlo event generators. The production of jets in association with a W or Z boson is an important process to study QCD in a multi-scale environment. The cross sections, differential in several kinematics variables, have been measured up to high jet multiplicities and compared to high-order QCD calculations. The exclusive processes of W+b and W+c production have also been measured with high precision and cross sections are compared to state-of-the-art high-order QCD calculations.