Search for invisible decays of the Higgs boson produced via vector boson fusion in proton-proton collisions at $\sqrt{s} =$ 13 TeV

The CMS collaboration
Phys.Rev.D 105 (2022) 092007, 2022.

Abstract
A search for invisible decays of the Higgs boson produced via vector boson fusion (VBF) has been performed with 101 fb$^{-1}$ of proton-proton collisions delivered by the LHC at $\sqrt{s} =$ 13 TeV and collected by the CMS detector in 2017 and 2018. The sensitivity to the VBF production mechanism is enhanced by constructing two analysis categories, one based on missing transverse momentum, and a second based on the properties of jets. In addition to control regions with Z and W boson candidate events, a highly populated control region, based on the production of a photon in association with jets, is used to constrain the dominant irreducible background from the invisible decay of a Z boson produced in association with jets. The results of this search are combined with all previous measurements in the VBF topology, based on data collected in 2012 (at $\sqrt{s} =$ 8 TeV), 2015, and 2016, corresponding to integrated luminosities of 19.7, 2.3, and 36.3 fb$^{-1}$, respectively. The observed (expected) upper limit on the invisible branching fraction of the Higgs boson is found to be 0.18 (0.10) at the 95% confidence level, assuming the standard model production cross section. The results are also interpreted in the context of Higgs-portal models.

  • Limits on the H$\to$inv. branching fraction

    Data from Figure 11 and supplemental Figure 2.

    10.17182/hepdata.114357.v1/t1

    Observed and expected 95% CL upper limits on ${{(\sigma_{\text{H}}/\sigma_{\text{H}}^{\mathrm{SM}}) \times {{\mathcal{B}(\text{H} \to \text{inv})}}}}$ for all three years of data taking,...

  • Comparison with direct detection experiments

    Data from Figure 13

    10.17182/hepdata.114357.v1/t2

    The 90% CL upper limits on the spin-independent DM-nucleon scattering cross section in Higgs-portal models, assuming a scalar or fermion...

  • Postfit event yields, signal region, MTR category

    Data from Table 4 / Figure 10.

    10.17182/hepdata.114357.v1/t3

    Expected event yields in each $m_{jj}$ bin for the different background processes in the SR of the MTR category, in...

  • Postfit event yields, signal region, VTR category

    Data from Table 5 / Figure 10.

    10.17182/hepdata.114357.v1/t4

    Expected event yields in each $m_{jj}$ bin for the different background processes in the SR of the VTR category, in...

  • Postfit yields, CR+SR fit, MTR, 2017, signal region

    Data from the supplemental material.

    10.17182/hepdata.114357.v1/t5

    Event yields for the postfit background model from the background-only and signal-plus-background fits, as well as the observed event yields...

  • Postfit yields, CR+SR fit, MTR, 2017, dimuon region

    Data from the supplemental material.

    10.17182/hepdata.114357.v1/t6

    Event yields for the postfit background model from the background-only and signal-plus-background fits, as well as the observed event yields...

  • Postfit yields, CR+SR fit, MTR, 2018, signal region

    Data from the supplemental material.

    10.17182/hepdata.114357.v1/t7

    Event yields for the postfit background model from the background-only and signal-plus-background fits, as well as the observed event yields...

  • Postfit yields, CR+SR fit, MTR, 2018, dimuon region

    Data from the supplemental material.

    10.17182/hepdata.114357.v1/t8

    Event yields for the postfit background model from the background-only and signal-plus-background fits, as well as the observed event yields...

  • Postfit yields, CR+SR fit, VTR, 2017, signal region

    Data from the supplemental material.

    10.17182/hepdata.114357.v1/t9

    Event yields for the postfit background model from the background-only and signal-plus-background fits, as well as the observed event yields...

  • Postfit yields, CR+SR fit, VTR, 2017, dimuon region

    Data from the supplemental material.

    10.17182/hepdata.114357.v1/t10

    Event yields for the postfit background model from the background-only and signal-plus-background fits, as well as the observed event yields...

  • Postfit yields, CR+SR fit, VTR, 2018, signal region

    Data from the supplemental material.

    10.17182/hepdata.114357.v1/t11

    Event yields for the postfit background model from the background-only and signal-plus-background fits, as well as the observed event yields...

  • Postfit yields, CR+SR fit, VTR, 2018, single electron region

    Data from the supplemental material.

    10.17182/hepdata.114357.v1/t12

    Event yields for the postfit background model from the background-only and signal-plus-background fits, as well as the observed event yields...

  • Postfit yields, CR+SR fit, VTR, 2018, dielectron region

    Data from the supplemental material.

    10.17182/hepdata.114357.v1/t13

    Event yields for the postfit background model from the background-only and signal-plus-background fits, as well as the observed event yields...

  • Postfit yields, CR+SR fit, VTR, 2018, dimuon region

    Data from the supplemental material.

    10.17182/hepdata.114357.v1/t14

    Event yields for the postfit background model from the background-only and signal-plus-background fits, as well as the observed event yields...

  • Postfit yields, CR+SR fit, MTR, 2017, photon region

    Data from the supplemental material.

    10.17182/hepdata.114357.v1/t15

    Event yields for the postfit background model from the background-only and signal-plus-background fits, as well as the observed event yields...

  • Postfit yields, CR+SR fit, MTR, 2018, photon region

    Data from the supplemental material.

    10.17182/hepdata.114357.v1/t16

    Event yields for the postfit background model from the background-only and signal-plus-background fits, as well as the observed event yields...

  • Postfit yields, CR+SR fit, MTR, 2017, single electron region

    Data from the supplemental material.

    10.17182/hepdata.114357.v1/t17

    Event yields for the postfit background model from the background-only and signal-plus-background fits, as well as the observed event yields...

  • Postfit yields, CR+SR fit, MTR, 2017, single muon region

    Data from the supplemental material.

    10.17182/hepdata.114357.v1/t18

    Event yields for the postfit background model from the background-only and signal-plus-background fits, as well as the observed event yields...

  • Postfit yields, CR+SR fit, MTR, 2017, dielectron region

    Data from the supplemental material.

    10.17182/hepdata.114357.v1/t19

    Event yields for the postfit background model from the background-only and signal-plus-background fits, as well as the observed event yields...

  • Postfit yields, CR+SR fit, MTR, 2018, single electron region

    Data from the supplemental material.

    10.17182/hepdata.114357.v1/t20

    Event yields for the postfit background model from the background-only and signal-plus-background fits, as well as the observed event yields...

  • Postfit yields, CR+SR fit, MTR, 2018, single muon region

    Data from the supplemental material.

    10.17182/hepdata.114357.v1/t21

    Event yields for the postfit background model from the background-only and signal-plus-background fits, as well as the observed event yields...

  • Postfit yields, CR+SR fit, MTR, 2018, dielectron region

    Data from the supplemental material.

    10.17182/hepdata.114357.v1/t22

    Event yields for the postfit background model from the background-only and signal-plus-background fits, as well as the observed event yields...

  • Postfit yields, CR+SR fit, VTR, 2017, single electron region

    Data from the supplemental material.

    10.17182/hepdata.114357.v1/t23

    Event yields for the postfit background model from the background-only and signal-plus-background fits, as well as the observed event yields...

  • Postfit yields, CR+SR fit, VTR, 2017, single muon region

    Data from the supplemental material.

    10.17182/hepdata.114357.v1/t24

    Event yields for the postfit background model from the background-only and signal-plus-background fits, as well as the observed event yields...

  • Postfit yields, CR+SR fit, VTR, 2017, dielectron region

    Data from the supplemental material.

    10.17182/hepdata.114357.v1/t25

    Event yields for the postfit background model from the background-only and signal-plus-background fits, as well as the observed event yields...

  • Postfit yields, CR+SR fit, VTR, 2018, single muon region

    Data from the supplemental material.

    10.17182/hepdata.114357.v1/t26

    Event yields for the postfit background model from the background-only and signal-plus-background fits, as well as the observed event yields...

  • Trigger efficiency, MTR

    Data from supplemental Figure 1.

    10.17182/hepdata.114357.v1/t27

    Trigger efficiency measured as a function of $p_{T}^{miss}$ in data for the 2017 and 2018 samples for the MTR category....

  • Trigger efficiency, VTR

    Data from supplemental Figure 1.

    10.17182/hepdata.114357.v1/t28

    Trigger efficiency measured as a function of $p_{T}^{miss}$ in data for the 2017 and 2018 samples for the MTR category....

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