Abstract
Inclusive, differential and production mode cross sections of the Higgs boson are measured in the H→ZZ∗→4ℓ decay channel. Additionally, cross sections are measured for the main production modes in several exclusive regions of the Higgs boson production phase space. The dataset used corresponds to proton-proton collision data produced at the Large Hadron Collider at a centre-of-mass energy of 13 TeV and recorded by the ATLAS detector from 2015 to 2018, equivalent to an integrated luminosity of 139 fb−1. The inclusive fiducial cross section for the process H→ZZ∗→4ℓ is measured to be 3.35 ± 0.32 fb, while the Standard Model prediction is 3.41 ± 0.18 fb. The cross-section times H→ZZ∗ branching ratio with |yH|< 2.5 for gluon fusion and vector-boson fusion production are measured to be 1.14±0.13 pb and 0.13±0.04 pb, respectively. All measurements are in agreement with the Standard Model prediction.