Prospects on the search for invisible Higgs decays in the ZH channel at the LHC and HL-LHC: A Snowmass White Paper

TL;DR

This white paper evaluates the potential to detect invisible Higgs decays via ZH production at the LHC and HL-LHC, estimating exclusion limits and exploring dark matter model implications.

Contribution

It provides detailed projections for invisible Higgs decay searches at current and future colliders, including systematic uncertainty considerations and dark matter interpretations.

Findings

Exclusion of 17-22% branching ratio at 95% CL with 300 fb^{-1}.

Exclusion of 6-14% with 3000 fb^{-1}.

Systematic uncertainties significantly impact sensitivity.

Abstract

We show prospects on a search for invisible decays of a Higgs boson at the Large Hadron Collider (LHC) and High Luminosity LHC (HL-LHC). This search is performed on a Higgs boson produced in association with a Z boson. We expect that the branching ratio of 17-22% (6-14%) could be excluded at 95% confidence level with 300 fb^{-1} (3000 fb^{-1}) of data at sqrt(s)=14 TeV. The range indicates different assumptions on the control of systematic uncertainties. Interpretations with Higgs-portal dark matter models are also considered.