  Measurements of the production of jets in association with a W/Z boson in
proton-proton collisions are presented using data collected by the ATLAS
experiment at LHC at sqrt s = 8 and 13 TeV. Several kinematic regimes are
explored with various approaches to probe different aspects of these processes.
The differential cross sections of a Z boson in association with jets with pT >
30 GeV and |y|< 2.5 at sqrt s = 13 TeV are measured in a fiducial phase space,
probing strong interactions that completely dominate in these processes, while
measurements of a W boson in association with at least two jets at high pT and
high di-jet invariant mass, where the electroweak production is enhanced, are
performed with sqrt s = 8 TeV data. Angular distributions in W+jets events with
high pT jets are also measured at sqrt s = 8 TeV focusing on small angular
separation between the jets and the W decay products, where contributions from
real W emission are expected large. Finally a measurement of the splitting
scales occurring in the kt jet-clustering algorithm is presented for final
states containing a Z boson at sqrt s = 8 TeV. This measurement based on
charged-particle track information constitutes a complementary approach to
study jet properties. Data distributions of all the measurements are corrected
for detector effects and compared with state-of-art predictions.
