Search for the Standard Model Higgs boson in the $H -> W^+ W^- -> ℓ^+ ν ℓ^− \overline ν$ final state with the ATLAS experiment and study of its spin and parity quantum numbers

Search and discovery of the Standard Model Higgs Boson, with the ATLAS experiment at the Large Hadron Collider, with up to 25 inverse femtobarns of data, in the WW -> lnulnu final state. The search has been conducted with a multivariate technique, namely the Boosted Decision Tree one, to fully exploit the topology of the final state and enhance the sensitivity. In addition, the measurement of the spin and parity quantum numbers of the newly found resounacne, has been performed, to assess its compatibility with the Higgs Boson as predicted by the Standard Model.