Internal Note Higgs Fiducial Cross Section Chapter for YR 4 Editors :

Over the past years fiducial measurements, both di↵erential and total, became standard practice for characterizing Standard Model processes at the LHC experiments. The advantage of quoting such a result over inclusive cross section measurements lies in the almost complete factorization of experimental and theoretical uncertainty sources. This chapter summarizes the state-of-the-art of predicting fiducial cross sections in the Standard Model and beyond the Standard Model e↵ects. In addition the experimental aspects and challenges of quoting fiducial measurements are discussed.