W and Z production measured using the ATLAS Detector and impact on parton densities of the proton

Differential and inclusive cross sections for W and Z production are presented, as well as the lepton charge asymmetry as a function of lepton rapidity. The data from pp collisions at 7 TeV were collected during 2010 using the ATLAS detector, are compared to the predictions of next-to-leading-order QCD with a variety of parton density fits. The impact of these measurements on the knowledge of the structure of the proton is discussed.