Analysis Optimization of the VBF HWW Measurement at the ATLAS Experiment

The precision measurements of the properties of the Higgs boson are among the principal goals of the LHC Run-2 program. This talk reports on the measurements of the fiducial and differential Higgs boson production cross section via Vector Boson Fusion with an electron, a muon, and two energetic neutrinos from the decay of W bosons, along with the presence of two energetic jets in the final states. The analysis uses $pp$ collision data at a center-of-mass energy of 13 TeV collected with the ATLAS detector between 2015 and 2018 corresponding to an integrated luminosity of 139 fb$^{-1}$. The optimizations of the selection criteria and the signal extraction methods will be discussed in detail, in particular the use of machine learning techniques for performing a multidimensional fit for extracting the signal and normalizing the simulated backgrounds to data.