Measurements of single and multi-boson production with the ATLAS detector

The inclusive productions of the W and the on- or off-shell Z/gamma* bosons are standard candles at hadron colliders, while the productions of jets in association with a W or a Z boson are important processes to study QCD in multi-scale environments. The measurements of their production cross-sections integrated and differential in several variables have been measured at 7, 8 and 13 TeV centre-of-mass energies and are compared to high-order QCD calculations and Monte Carlo simulations. These measurements have an impact on our knowledge of the parton densities of the proton, tests soft resummation effects and hard emissions for small and large momentum transfers and in multi-scale processes. The ATLAS Collaboration is also engaged in precision measurements of fundamental Standard Model parameters in Drell-Yan final state, e.g. the weak-mixing angle and the W mass. The ATLAS collaboration has also carried out a set of measurements that provide stringent tests of the electroweak sector of Standard Model at different centre-of-mass energies, specifically on di- and multi-boson production cross sections, vector boson fusion and scattering, as well as triple and quartic gauge-boson couplings. These measurements are compared to (N)NLO QCD predictions of the Standard Model and provide model-independent constraints on new physics, by setting limits on anomalous gauge-boson couplings.