Abstract
This thesis reports the vector boson fusion production cross section for the Higgs boson in the $\hwwlnln$ final state measured as a function of kinematic observables sensitive to the Higgs boson production and decay properties as well as integrated in a fiducial phase space. The analysis is performed using the proton-proton collision data collected by the ATLAS detector in the LHC Run-2 at $\sqrt{s}= 13$ TeV center-of-mass energy, corresponding to an integrated luminosity of 139 fb$^{-1}$. The data are corrected for the effects of detector inefficiency and resolution, and the measurements are compared to different state-of-the-art theoretical predictions. The observed fiducial cross section of $1.68^{+0.40}_{-0.38}$~fb is compatible with the Standard Model prediction at a cross section of $2.07\pm0.04$~fb. The differential cross sections are finally used to constrain anomalous CP-even and CP-odd interactions using a dimension-6 Effective Field Theory formalism.