Study of (W/Z)H production using H->WW* decays with the ATLAS detector at LHC

A search for the Higgs boson associated production modes WH and ZH is performed in the Higgs boson decay channel H!WW , with the data collected by the ATLAS experiment at the LHC in 2011 and 2012, at p s = 7 TeV and 8 TeV, respectively. For the WH associated production the three-leptons final state, in which three W bosons decay to leptons, and two-leptons final state, in which one W boson decays to hadrons, are studied. The four-leptons final state is used to search for the ZH production.