Prospects of Measuring ZZ and WZ Polarization with ATLAS

The measurement of angular distributions of the decay leptons in di-boson final states allows to reconstruct the spin density element rho_00 in processes where ZZ and WZ final states are produced via quark anti-quark annihilation in proton-proton collisions at the LHC. This note presents the expected sensitivity of such measurement with the ATLAS experiment, using electrons and muons as final state leptons, based on an integrated luminosity of 100 inverse femtobarns. Besides the statistical accuracy on the fraction of longitudinally polarized Z or W boson, various contributions to the systematic uncertainty, have been studied.