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 = 13 TeV

Abstract

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

$${\sqrt{s}=13\,\text {Te}\hspace{-.08em}\text {V}}$$

s

= 13

Te

V

by the CMS experiment at the LHC, corresponding to an integrated luminosity of 138

$$\,\text {fb}^{-1}$$

fb

- 1

. The 95% confidence level upper limit set on the branching fraction of the 125

$$\,\text {Ge}\hspace{-.08em}\text {V}$$

Ge

V

Higgs boson to invisible particles,

$${\mathcal {B}({\textrm{H}} \rightarrow \text {inv})}$$

B ( H → inv )

, is 0.54 (0.39 expected), assuming standard model production cross sections. The results of this analysis are combined with previous

$${\mathcal {B}({\textrm{H}} \rightarrow \text {inv})}$$

B ( H → inv )

searches carried out at

$${\sqrt{s}=7}$$

s

= 7

, 8, and 13

$$\,\text {Te}\hspace{-.08em}\text {V}$$

Te

V

in complementary production modes. The combined upper limit at 95% confidence level on

$${\mathcal {B}({\textrm{H}} \rightarrow \text {inv})}$$

B ( H → inv )

is 0.15 (0.08 expected).