Prospective study of vector boson scattering in WZ fully leptonic final state at HL-LHC

Prospects are presented for measuring at HL-LHC in ATLAS phase II, the electroweak production of WZ in fully leptonic final state. Different detector setups are evaluated and compared to the phase 0 ATLAS detector; they include an extended tracker, a high granularity timing detector and a forward muon-tagger. In addition different conditions of pile-up event rejection are considered. Finally, studies on the polarisation of the vector bosons are reported. The results presented in this note were obtained with an integreated luminosity of 3000 fb-1 at a centre of mass energy of 14 TeV.