Measurements of Higgs boson production by gluon-gluon fusion and vector-boson fusion using $H\to W{W}^{*}\to e\nu \mu \nu $ decays in $pp$ collisions at $\sqrt{s}=13\text{}\text{}\mathrm{TeV}$ with the ATLAS detector

Higgs boson production via gluon-gluon fusion and vector-boson fusion in proton-proton collisions is measured in the $H\to W{W}^{*}\to e\nu \mu \nu $ decay channel. The Large Hadron Collider delivered proton-proton collisions at a center-of-mass energy of 13 TeV between 2015 and 2018, which were recorded by the ATLAS detector, corresponding to an integrated luminosity of $139\text{}\text{}{\mathrm{fb}}^{-1}$. The total cross sections for Higgs boson production by gluon-gluon fusion and vector-boson fusion times the $H\to W{W}^{*}$ branching ratio are measured to be $12.0±1.4$ and $0.75{\text{}}_{-0.16}^{+0.19}\text{}\text{}\mathrm{pb}$, respectively, in agreement with the Standard Model predictions of $10.4±0.6$ and $0.81±0.02\text{}\text{}\mathrm{pb}$. Higgs boson production is further characterized through measurements of Simplified Template Cross Sections in a total of 11 kinematic fiducial regions.