A search for decays of the Higgs boson to invisible particles in events with a top-antitop quark pair or a vector boson in proton-proton collisions at s=13TeV

Abstract

A search for decays to invisible particles of Higgs bosons produced in association with a top-antitop quark pair or a vector boson, which both decay to a fully hadronic final state, has been performed using proton-proton collision data collected at $\sqrt{s}=13\text{Te}\text{V}$ by the CMS experiment at the LHC, corresponding to an integrated luminosity of 138${\text{fb}}^{-1}$. The 95% confidence level upper limit set on the branching fraction of the 125$\text{Ge}\text{V}$ Higgs boson to invisible particles, $B(\text{H}\to \text{inv})$, is 0.54 (0.39 expected), assuming standard model production cross sections. The results of this analysis are combined with previous $B(\text{H}\to \text{inv})$ searches carried out at $\sqrt{s}=7$, 8, and 13$\text{Te}\text{V}$ in complementary production modes. The combined upper limit at 95% confidence level on $B(\text{H}\to \text{inv})$ is 0.15 (0.08 expected).