CMS
PRELIMINARY
BEYOND SM
Search for Higgs boson decays to invisible particles produced in association with a top-quark pair or a vector boson in proton-proton collisions at \texorpdfstring{\sqrt{s}=13~\mathrm{TeV}} and combination across Higgs production modes

A search for Higgs boson decays to invisible particles, produced in association with a top quark pair or a vector boson decaying in a fully hadronic final state, has been performed using 138~\mathrm{fb^{-1}} of proton-proton collision data collected at \sqrt{s}=13~\mathrm{TeV} by the CMS experiment at the LHC. Events are categorized based on jet multiplicity, the number of jets stemming from b quark decays as well as the number of hadronically decaying boosted top quarks and W bosons reconstructed as a single large-cone jet in the detector. The observed (expected) limit set on the invisible branching fraction of the 125~\mathrm{GeV} Higgs boson is 0.47~(0.40), assuming standard model production cross sections. Finally, the results of this analysis are combined with previous CMS measurements of the Higgs to invisible branching fraction carried out at \sqrt{s}=7,~8,~and 13~\mathrm{TeV} in complementary production modes. The combined limit on the branching fraction is 0.15~(0.08), the most stringent result from direct searches at CMS to date.

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