Abstract
We combine the NNLO QCD description of Higgs boson production in association with an electroweak vector boson $V = W~{\rm or}~Z$ with a similarly-precise description of Higgs boson decays into a pair of massive $b$ quarks and with the anomalous couplings that modify interactions of the Higgs and electroweak vector bosons. The resulting numerical code provides the most advanced theoretical tool to investigate such anomalous couplings in the associated Higgs boson production process. We study the impact of anomalous couplings on fiducial cross sections and differential distributions and argue that, with increased QCD precision, smaller anomalous couplings become accessible in kinematic regions where the effects of higher-dimensional operators in the Standard Model Effective Field Theory remain small and the EFT expansion is under control.
Highlights
Studies of Higgs boson properties in experiments at the Large Hadron Collider (LHC) have converged to the conclusion [1] that the Standard Model of particle physics describes Higgs couplings to gauge bosons and to matter fields with a precision between 10% and 30%
We study the impact of anomalous couplings on fiducial cross sections and differential distributions and argue that, with increased QCD precision, smaller anomalous couplings become accessible in kinematic regions where the effects of higher-dimensional operators in the Standard Model effective field theory remain small and the effective field theory expansion is under control
We presented computations of next-to-next-to-leading order (NNLO) QCD corrections to Higgs boson production in association with a W or Z boson
Summary
Studies of Higgs boson properties in experiments at the Large Hadron Collider (LHC) have converged to the conclusion [1] that the Standard Model of particle physics describes Higgs couplings to gauge bosons and to (some) matter fields with a precision between 10% and 30%. Associated production processes provide an environment in which the decay of the Higgs to a bbpair can be observed [2,3,4,5,6], allowing the study of the Higgs coupling to b quarks. Describing both the production pp → VH and the decay H → bbprocesses with the same precision is important. It is important to consider b quarks as massive since in this case one can apply conventional jet algorithms to identify b jets and reconstruct Higgs boson kinematics Approximate results for the Oðα3sÞ contributions due to gg → ZH suggest that these can be quite
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