Fiducial cross sections for the four-lepton decay mode in Higgs-plus-jet production up to NNLO QCD

Understand

The four-lepton decay mode of the Higgs boson allows for a clean kinematic reconstruction, thereby enabling precision studies of the Higgs boson properties and of its production dynamics.

• We compute the NNLO QCD corrections to fiducial cross sections relevant to this decay mode in the gluon-fusion production of a Higgs boson in association with a hadronic jet, and study the impact of the QCD corrections on the fiducial acceptance factors in inclusive Higgs and Higgs-plus-jet production.
• We investigate in detail the different definitions used in the ATLAS and CMS measurements to define the fiducial cross sections.
• Differences in the lepton isolation prescription are found to have a sizeable impact on the higher order corrections to the fiducial acceptance factors.