Determination of Spin and CP of the Higgs Boson in ATLAS

Studies of the spin of the Higgs boson are presented, based on proton-proton collision data collected by ATLAS detector at the LHC. The Standard Model spin-parity hypothesis is compared with alternative hypotheses using the Higgs boson decays in the three discovery channels, and the combination of them. All the studies show the compatibility of the data with the Standard Model Higgs boson and reject althernative models with a CLs up to 97.8%.