CMS-PAS-HIG-21-007

CMS-PAS-HIG-21-007
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 $ \sqrt{s}= $ 13 TeV and combination across Higgs production modes
CMS Collaboration
September 2022

Abstract: 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 fb$^{-1}$ of proton-proton collision data collected at $ \sqrt{s}= $ 13 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 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 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.
Links: CDS record (PDF) ; CADI line (restricted) ; These preliminary results are superseded in this paper, Submitted to EPJC. The superseded preliminary plots can be found here.

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