  High-precision measurements of the Drell-Yan production provide information
on different aspects contributing to the process, such as parton distribution
functions (PDFs), and comparisons with the current precision reached
theoretically on the calculations of the cross sections of such processes. This
document describes ATLAS measurements, performed at different centre-of-mass
energies, of vector boson (W and Z) cross sections and cross-section ratios. It
also discusses measurements of ratios of Z-boson and top-quark pair production
cross sections, which provide important information on the proton PDFs.
