Semi-dark Higgs decays: sweeping the Higgs neutrino floor

Abstract

We study exotic Higgs decays $h\to ZX$, with $X$ an invisible beyond the Standard Model (SM) particle, resulting in a semi-dark final state. Such exotic Higgs decays may occur in theories of axion-like-particles (ALPs), dark photons or pseudoscalar mediators between the SM and dark matter. The SM process $h\to Z\nu \bar{\nu }$ represents an irreducible "neutrino floor" background to these new physics searches, providing also a target experimental sensitivity for them. We analyze $h\to Z+\text{invisible}$ searches at the LHC and a future ILC, showing that these exotic Higgs decays can yield sensitivity to unexplored regions of parameter space for ALPs and dark matter models.

arXiv comment11 pages with appendices, 7 figures

References in corpus (73)

• Planck 2015 results. XIII. Cosmological parameters
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• An Introduction to PYTHIA 8.2
• Asymptotic formulae for likelihood-based tests of new physics
• DELPHES 3, A modular framework for fast simulation of a generic collider experiment
• FeynRules 2.0 - A complete toolbox for tree-level phenomenology
• Theory and phenomenology of two-Higgs-doublet models
• Dark Matter Search Results from a One Tonne$\times$Year Exposure of XENON1T
• The CP-conserving two-Higgs-doublet model: the approach to the decoupling limit
• Dark Matter Annihilation in The Galactic Center As Seen by the Fermi Gamma Ray Space Telescope
• Single-top hadroproduction in association with a W boson
• HiggsSignals: Confronting arbitrary Higgs sectors with measurements at the Tevatron and the LHC
• Collider Probes of Axion-Like Particles
• ZZ production at hadron colliders in NNLO QCD
• Fermi-LAT Observations of High-Energy Gamma-Ray Emission Toward the Galactic Center
• Exotic Decays of the 125 GeV Higgs Boson
• LEP Shines Light on Dark Matter
• Probing MeV to 90 GeV axion-like particles with LEP and LHC
• ALPs Effective Field Theory and Collider Signatures
• Revised constraints and Belle II sensitivity for visible and invisible axion-like particles
• Searching for axion-like particles with ultra-peripheral heavy-ion collisions
• A Renormalizable Model for the Galactic Center Gamma Ray Excess from Dark Matter Annihilation
• HiggsSignals-2: Probing new physics with precision Higgs measurements in the LHC 13 TeV era
• Evidence for light-by-light scattering and searches for axion-like particles in ultraperipheral PbPb collisions at $\sqrt{s_{\mathrm{NN}}}=$ 5.02 TeV
• Illuminating the photon content of the proton within a global PDF analysis
• ALPtraum: ALP production in proton beam dump experiments
• $\bar{B}\to X_s\gamma$ in the Two Higgs Doublet Model up to Next-to-Next-to-Leading Order in QCD
• LHC probes the hidden sector
• Neutrino Backgrounds to Dark Matter Searches
• Observation of an Excess in the Search for the Standard Model Higgs Boson at ALEPH
• Extended gamma-ray emission from Coy Dark Matter
• Simplified dark matter models with two Higgs doublets: I. Pseudoscalar mediators
• Towards B -> X_s gamma at the NNLO in QCD without interpolation in m_c
• NLO QCD corrections to tri-boson production
• B_{s,d} -> l+ l- in a Two-Higgs-Doublet Model
• The Galactic Center Excess from the Bottom Up
• Simplified Models for Dark Matter Face their Consistent Completions
• Search for heavy resonances decaying into a pair of $Z$ bosons in the ${\ell }^{+}{\ell }^{-}{\ell }^{\prime +}{\ell }^{\prime -}$ and ${\ell }^{+}{\ell }^{-}\nu \bar{\nu }$ final states using 139 fb${}^{-1}$ of proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Final results of the searches for neutral Higgs bosons in e+e- collisions at sqrt(s) up to 209GeV
• Associated production of a top quark pair with a heavy electroweak gauge boson at NLO+NNLL accuracy
• Search for an exotic decay of the Higgs boson to a pair of light pseudoscalars in the final state with two b quarks and two $\tau$ leptons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Looking through the Pseudo-Scalar Portal into Dark Matter: Novel Mono-Higgs and Mono-$Z$ Signatures at LHC
• Search for an exotic decay of the Higgs boson to a pair of light pseudoscalars in the final state with two muons and two b quarks in pp collisions at 13 TeV
• Axion couplings to electroweak gauge bosons
• Search for Production of Invisible Final States in Single-Photon Decays of Upsilon(1S)
• Search for one large extra dimension with the DELPHI detector at LEP
• Search for the Higgs boson produced in association with a vector boson and decaying into two spin-zero particles in the $H\to aa\to 4b$ channel in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for the Standard Model Higgs Boson with the OPAL Detector at LEP
• Search for an exotic decay of the Higgs boson to a pair of light pseudoscalars in the final state of two muons and two $\tau$ leptons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Standard Model Higgs Boson with the L3 Experiment at LEP
• Loop-induced direct detection signatures from CP-violating scalar mediators
• Search for light pseudoscalar boson pairs produced from decays of the 125 GeV Higgs boson in final states with two muons and two nearby tracks in pp collisions at $\sqrt{s}=$ 13 TeV
• Search for a light pseudoscalar Higgs boson in the boosted $\mu \mu \tau \tau$ final state in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for Higgs boson decays into two new low-mass spin-0 particles in the 4$b$ channel with the ATLAS detector using $pp$ collisions at $\sqrt{s}=13$ TeV
• Search for Higgs boson decays into pairs of light (pseudo)scalar particles in the $\gamma \gamma jj$ final state in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Final results from DELPHI on the searches for SM and MSSM Neutral Higgs bosons
• Nonresonant Searches for Axion-Like Particles in Vector Boson Scattering Processes at the LHC
• Search for Higgs boson decays into a pair of pseudoscalar particles in the $bb\mu \mu$ final state with the ATLAS detector in $pp$ collisions at $\sqrt{s}=13$ TeV
• Higgs decay with monophoton + MET signature from low scale supersymmetry breaking
• Probing the Pseudoscalar portal to Dark Matter via $\bar{b}bZ(\to \ell \ell )+E_T/$: From the LHC to the Galactic Centre Excess
• Search for associated production of a $Z$ boson with an invisibly decaying Higgs boson or dark matter candidates at $\sqrt{s}=13$ TeV with the ATLAS detector
• Partially (in)visible Higgs decays at the LHC
• Maximum value of the spin-independent cross section in the THDM+a
• Search for Higgs boson decays into a $Z$ boson and a light hadronically decaying resonance using 13 TeV $pp$ collision data from the ATLAS detector
• Observation of electroweak production of two jets in association with an isolated photon and missing transverse momentum, and search for a Higgs boson decaying into invisible particles at 13 TeV with the ATLAS detector
• The THDMa revisited
• Search for low-mass dilepton resonances in Higgs boson decays to four-lepton final states in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for Higgs bosons decaying into new spin-0 or spin-1 particles in four-lepton final states with the ATLAS detector with 139 fb${}^{-1}$ of $pp$ collision data at $\sqrt{s}=13$ TeV
• Search for dark photons in decays of Higgs bosons produced in association with Z bosons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for dark photons in Higgs boson production via vector boson fusion in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for exotic decays of a Higgs boson into undetectable particles and one or more photons
• Single top production in association with a $WZ$ pair at the LHC in the SMEFT
• Search for exotic decays of the Higgs boson into $b\bar{b}$ and missing transverse momentum in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

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• ATLAS searches for additional scalars and exotic Higgs boson decays with the LHC Run 2 dataset
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