Abstract
Higgs boson production via gluon-gluon fusion and vector-boson fusion in proton-proton collisions is
measured in the H → WW → eνμν 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 fb−1. The total cross sections for Higgs
boson production by gluon-gluon fusion and vector-boson fusion times the H → WW branching ratio
are measured to be 12.0 1.4 and 0.75 þ0.19 pb, respectively, in agreement with the Standard Model −0.16
predictions of 10.4 0.6 and 0.81 0.02 pb. Higgs boson production is further characterized through measurements of Simplified Template Cross Sections in a total of 11 kinematic fiducial regions.