Nonstandard Higgs Boson Decays

Abstract

This review summarizes the motivations for and phenomenological consequences of nonstandard Higgs boson decays, with emphasis on final states containing a pair of non-Standard-Model particles that subsequently decay to Standard Model particles. Typically these non-Standard-Model particles are part of a ``hidden'' sector, for example a pair of neutral Higgs bosons or a pair of unstable neutralinos. We emphasize that such decays allow for a Higgs substantially below the Standard Model Higgs LEP limit of 114 GeV. This in turn means that the ``fine-tuning'' problems of many Beyond the Standard Model (BSM) theories, in particular supersymmetric models, can be eliminated while achieving excellent consistency with precision electroweak data which favor a Higgs boson with mass below $100\gev$ and standard $WW$, $ZZ$, and top couplings.

53 pages, review intended for Annual Reviews of Nuclear Science. Final corrections and references now included

References in corpus (53)

• A Large Mass Hierarchy from a Small Extra Dimension
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Cosmological Parameters 2006
• Search for the Standard Model Higgs Boson at LEP
• HDECAY: a Program for Higgs Boson Decays in the Standard Model and its Supersymmetric Extension
• Echoes of a Hidden Valley at Hadron Colliders
• Search for Neutral MSSM Higgs Bosons at LEP
• Little Higgs Review
• Singlet Higgs Phenomenology and the Electroweak Phase Transition
• Little Higgs Models and Their Phenomenology
• NMHDECAY: A Fortran Code for the Higgs Masses, Couplings and Decay Widths in the NMSSM
• Escaping the Large Fine Tuning and Little Hierarchy Problems in the Next to Minimal Supersymmetric Model and h-> aa Decays
• Minimal Extension of the Standard Model Scalar Sector
• Observing an invisible Higgs boson
• Electroweak Baryogenesis and Dark Matter in the nMSSM
• CP-Violating MSSM Higgs Bosons in the Light of LEP 2
• Higgs Sector in Extensions of the MSSM
• Higgs Boson Decays to CP-odd Scalars at the Tevatron and Beyond
• Decay-mode independent searches for new scalar bosons with the OPAL detector at LEP
• Higgs Physics as a Window Beyond the MSSM (BMSSM)
• Consistency of LEP $Z+b$-jets excess with an {\boldmath $h\to aa$} Decay Scenario and Low-Fine-Tuning NMSSM Models
• Difficult Scenarios for NMSSM Higgs Discovery at the LHC
• Naturalness and Higgs Decays in the MSSM with a Singlet
• Influence of strongly coupled, hidden scalars on Higgs signals
• The NMSSM Close to the R-symmetry Limit and Naturalness in $h\to aa$ Decays for $m_a<2\mb$
• Searches for Neutral Higgs Bosons in Extended Models
• Probing NMSSM Scenarios with Minimal Fine-Tuning by Searching for Decays of the Upsilon to a Light CP-Odd Higgs Boson
• The NMSSM Solution to the Fine-Tuning Problem, Precision Electroweak Constraints and the Largest LEP Higgs Event Excess
• Role of h --> eta eta in Intermediate-Mass Higgs Boson Searches at the Large Hadron Collider
• A Higgs or Not a Higgs? What to Do if You Discover a New Scalar Particle
• Unparticles-Higgs Interplay
• Electroweak Data and the Higgs Boson Mass: A Case for New Physics
• Collider Signatures of Singlet Extended Higgs Sectors
• Visible Cascade Higgs Decays to Four Photons at Hadron Colliders
• Broadening the Higgs Boson with Right-Handed Neutrinos and a Higher Dimension Operator at the Electroweak Scale
• The Higgs Sector in a $U(1{)}^{\prime }$ Extension of the MSSM
• Hiding the Higgs at the LHC
• Radiatively Generated Maximal Mixing Scenario for the Higgs Mass and the Least Fine Tuned Minimal Supersymmetric Standard Model
• A No-Lose Theorem for Higgs Searches at a Future Linear Collider
• Hunting a light CP-odd non-standard Higgs boson through its tauonic decay at a (Super) B factory
• Another step towards a no-lose theorem for NMSSM Higgs discovery at the LHC
• Search for a low mass CP-odd Higgs boson in e+e- collisions with the OPAL detector at LEP2
• Neutralino Signatures of the Singlet Extended MSSM
• Non standard analysis of the solar neutrino anomaly (updated including the SNO day/night spectral data)
• Supersymmetric Phase Transitions and Gravitational Waves at LISA
• A Supersymmetric Explanation of the Excess of Higgs-Like Events at LEP
• A Solution for Little Hierarchy Problem and b --> s gamma
• Higgs at the Tevatron in Extended Supersymmetric Models
• Radiative Yukawa Couplings for Supersymmetric Higgs Singlets at Large tan(beta)
• Associated production of a light pseudoscalar Higgs boson with a chargino pair in the NMSSM
• Can an invisible Higgs boson be seen via diffraction at the LHC?
• LEP Indications for Two Light Higgs Bosons and U(1)' Model
• Proposal for Higgs and Superpartner Searches at the LHCb Experiment

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• Theory and phenomenology of two-Higgs-doublet models
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• Beyond the Minimal Composite Higgs Model
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• Stealth Supersymmetry
• Building and testing models with extended Higgs sectors
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• The Hunt for New Physics at the Large Hadron Collider
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• Probing for Invisible Higgs Decays with Global Fits
• Displaced Supersymmetry
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• Exploring the Higgs Portal with 10/fb at the LHC
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• Constraining the Axion Portal with B -> K l+ l-
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• Search for pair-produced long-lived neutral particles decaying in the ATLAS hadronic calorimeter in $pp$ collisions at $\sqrt{s}$ = 8 TeV
• RECAST: Extending the Impact of Existing Analyses
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• 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
• Search for neutral Higgs bosons decaying into four taus at LEP2
• Search for a non-standard-model Higgs boson decaying to a pair of new light bosons in four-muon final states
• Evasive Higgs Maneuvers at the LHC
• Higgs decays to dark matter: beyond the minimal model
• New constraints on a light CP-odd Higgs boson and related NMSSM Ideal Higgs Scenarios
• Search for NMSSM Higgs bosons in the h->aa->mumu mumu, mumu tautau channels using ppbar collisions at sqrt{s}=1.96 TeV
• 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
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• Search for long-lived neutral particles in $pp$ collisions at $\sqrt{s}$ = 13 TeV that decay into displaced hadronic jets in the ATLAS calorimeter
• Measuring the Invisible Higgs Width at the 7 and 8 TeV LHC
• Search for light bosons in decays of the 125 GeV Higgs boson in proton-proton collisions at sqrt(s) = 8 TeV
• From the LHC to Future Colliders
• Updated search for long-lived particles decaying to jet pairs
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• Capture and Indirect Detection of Inelastic Dark Matter
• Singlet Neighbors of the Higgs Boson
• Discovering the Higgs with Low Mass Muon Pairs
• Diphotons from Tetraphotons in the Decay of a 125 GeV Higgs at the LHC
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• Search for resonant pair production of neutral long-lived particles decaying to bbbar in ppbar collisions at sqrt(s)=1.96 TeV
• Search for Higgs boson decays into a pair of light bosons in the $bb\mu \mu$ final state in $pp$ collision at $\sqrt{s}=$13 TeV with the ATLAS detector
• Radiative Upsilon decays and a light pseudoscalar Higgs in the NMSSM
• 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
• The Dark Side of the Electroweak Phase Transition
• Hiding the Higgs Boson with Multiple Scalars
• 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
• Many Light Higgs Bosons in the NMSSM
• Higgs Boson Sector of the Next-to-MSSM with CP Violation
• Exotic Higgs decays in the E6 inspired SUSY models
• Superconformal Technicolor
• Light Higgs Boson, Light Dark Matter and Gamma Rays
• 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
• Invisible Higgs Decay in a Supersymmetric Inverse Seesaw Model with Light Sneutrino Dark Matter
• Improving the tunings of the MSSM by adding triplets and singlet
• Hiding a Heavy Higgs Boson at the 7 TeV LHC
• A light CP-odd Higgs boson and the muon anomalous magnetic moment
• Singlino-driven Electroweak Baryogenesis in the Next-to-MSSM
• Non-Standard Higgs Decays in U(1) Extensions of the MSSM
• Superconformal Technicolor: Models and Phenomenology
• Unusual Higgs or Supersymmetry from Natural Electroweak Symmetry Breaking
• Search for the Higgs boson produced in association with a $W$ boson and decaying to four $b$-quarks via two spin-zero particles in $pp$ collisions at 13 TeV with the ATLAS detector
• Higgs Production Amidst the LHC Detector
• Unburied Higgs
• Testing SUSY
• Partially (in)visible Higgs decays at the LHC
• Dark Higgs Models at the 7 TeV LHC
• Direct production of a light CP-odd Higgs boson at the Tevatron and LHC
• Higgs Mediated EDMs in the Next-to-MSSM: An Application to Electroweak Baryogenesis
• Multiple Higgs-Portal and Gauge-Kinetic Mixings
• Prospects of searching for (un)particles from Hidden Sectors using rapidity correlations in multiparticle production at the LHC
• $H\to {\tau }^{+}{\tau }^{-}\gamma$ as a Probe of the $\tau$ Magnetic Dipole Moment
• Visible Supersymmetry Breaking and an Invisible Higgs
• Uncovering light scalars with exotic Higgs decays to bbmumu
• Updated constraints from radiative ${\rm Y}$ decays on a light CP-odd Higgs
• 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
• Singlet Extensions of the MSSM in the Quiver Landscape
• A New Avenue to Charged Higgs Discovery in Multi-Higgs Models
• Search for neutral long-lived particles in $pp$ collisions at $\sqrt{s}=13$ TeV that decay into displaced hadronic jets in the ATLAS calorimeter
• Search for a Very Light CP-Odd Higgs Boson in Top Quark Decays from p-anti-p Collisions at 1.96 TeV
• Buried Higgs
• Hidden Thresholds: A Technique for Reconstructing New Physics Masses at Hadron Colliders
• SUSY Digs up a Buried Higgs
• Associated Production of Non-Standard Higgs Bosons at the LHC
• Strong Electroweak Symmetry Breaking and Spin 0 Resonances
• Gauge Mediation with a small mu term and light squarks
• Novel Higgs decay signals in R-parity violating models
• QCD exotics versus a Standard Model Higgs
• Higgs boson decays and production in the left-right twin Higgs model
• Implications of a New Light Scalar Near the Bottomonium Regime
• Charming Higgs
• Trilepton Signatures of Light Charged and CP-odd Higgs Bosons in Top Quark Decays
• Next-to-Minimal Supersymmetric Model Higgs Scenarios for Partially Universal GUT Scale Boundary Conditions
• Probing light pseudoscalar, axial vector states through ${\eta }_b\to {\tau }^{+}{\tau }^{-}$
• Indirect Detection Imprint of a CP Violating Dark Sector
• Seeking the CP-odd Higgs via $h\to {\eta }_{c,b}{\ell }^{+}{\ell }^{-}$
• Search for neutral long-lived particles that decay into displaced jets in the ATLAS calorimeter in association with leptons or jets using $pp$ collisions at $\sqrt{s}=13$ TeV
• Uncovering the Charming Higgs at the LHC
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• Natural h -> 4g in Supersymmetric Models and R-Hadrons at the LHC
• Protecting unparticles from the MSSM Higgs sector
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• Search for decays of the Higgs boson into a pair of pseudoscalar particles decaying into $b\bar{b}{\tau }^{+}{\tau }^{-}$ using $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Phenomenological Aspects of the $E_6$SSM
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• Phenomenological aspects of Supersymmetry: SUSY models and electroweak symmetry breaking
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• Reconstruction and identification of pairs of collimated $\tau$-leptons decaying hadronically using $\sqrt{s}=13$ TeV $pp$ collision data with the ATLAS detector
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• Search for rare and exotic Higgs Boson decay modes
• Theoretical aspects of electroweak symmetry breaking in SUSY models
• Lepton-flavor violation and two loop electroweak corrections to $(g-2{)}_{\mu }$ in the triplets