NNLO QCD Corrections for Higgs-plus-jet Production in the Four-lepton Decay Mode

TL;DR

This paper computes NNLO QCD corrections for Higgs-plus-jet production with Higgs decay to four leptons at the LHC, providing detailed predictions for differential cross sections relevant for experimental analyses.

Contribution

It presents the first NNLO QCD calculation for Higgs-plus-jet production including Higgs decay to four leptons, enabling more precise theoretical predictions.

Findings

Higher-order corrections significantly affect cross section normalization.

Shape of differential distributions is notably altered by NNLO corrections.

Results aid in interpreting LHC measurements with full Run II data.

Abstract

We present the computation of Higgs boson production in association with a jet at the LHC including QCD corrections up to NNLO. The calculation includes the subsequent decay of the Higgs boson into four leptons, allowing for the full reconstruction of the final-state kinematics. In anticipation of improved LHC measurements based on the full Run II dataset, we present a study for single- and double-differential cross sections within the fiducial volume as defined in prior ATLAS analyses. Higher-order corrections are found to have a sizeable impact on both normalisation and shape of differential cross sections.