Real singlet scalar dark matter extension of the Georgi-Machacek model

Abstract

The Georgi-Machacek model extends the Standard Model Higgs sector with the addition of isospin-triplet scalar fields in such a way as to preserve the custodial symmetry. The presence of higher-isospin scalars contributing to electroweak symmetry breaking offers the interesting possibility that the couplings of the 125 GeV Higgs boson to both gluons and vector boson pairs could be larger than those of the Standard Model Higgs boson. Constraining this possibility using measurements of Higgs production and decay at the CERN Large Hadron Collider is notoriously problematic if a new, non-Standard Model decay mode of the 125 GeV Higgs boson is present. We study an implementation of this scenario in which the Georgi-Machacek model is extended by a real singlet scalar dark matter candidate, and require that the singlet scalar account for all the dark matter in the universe. The combination of the observed dark matter relic density and direct detection constraints exclude singlet scalar masses below about 57 GeV. Higgs measurements are not yet precise enough to be very sensitive to $h\to SS$ in the remaining allowed kinematic region, so that constraints from Higgs measurements are so far the same as in the GM model without a singlet scalar. We also find that, above the Higgs pole, a substantial region of parameter space yielding the correct dark matter relic density can escape the near-future direct detection experiments DEAP and XENON~1T for dark matter masses as low as 120 GeV and even have a direct detection cross section below the neutrino floor for $m_S\gtrsim 150$ GeV. This is in contrast to the singlet scalar dark matter extension of the Standard Model, for which these future experiments are expected to exclude dark matter masses above the Higgs pole up to the multi-TeV range.

arXiv comment17 pages, 8 figures

References in corpus (73)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi-LAT Data
• Measurements of the Higgs boson production and decay rates and constraints on its couplings from a combined ATLAS and CMS analysis of the LHC $pp$ collision data at $\sqrt{s}=$ 7 and 8 TeV
• Gauge Singlet Scalars as Cold Dark Matter
• The Minimal Model of Nonbaryonic Dark Matter: A Singlet Scalar
• Neutralino Relic Density including Coannihilations
• Implication of neutrino backgrounds on the reach of next generation dark matter direct detection experiments
• Update on scalar singlet dark matter
• LHC Phenomenology of an Extended Standard Model with a Real Scalar Singlet
• Implications of LHC searches for Higgs--portal dark matter
• Thermally Generated Gauge Singlet Scalars as Self-Interacting Dark Matter
• SuperIso v3.0: A program for calculating flavor physics observables in 2HDM and supersymmetry
• SuperIso: A program for calculating the isospin asymmetry of B -> K* gamma in the MSSM
• Direct detection of Higgs-portal dark matter at the LHC
• Measuring Higgs boson couplings at the LHC
• Constraints on new phenomena via Higgs boson couplings and invisible decays with the ATLAS detector
• The Higgs Potential in the Type II Seesaw Model
• Vacuum Stability, Perturbativity, and Scalar Singlet Dark Matter
• Radiative Corrections to the $Zb\bar{b}$ Vertex and Constraints on Extended Higgs Sectors
• Implications of the 125 GeV Higgs boson for scalar dark matter and for the CMSSM phenomenology
• A "Littlest Higgs" Model with Custodial SU(2) Symmetry
• Little Higgs and Custodial SU(2)
• Constraints on Scalar Dark Matter from Direct Experimental Searches
• Have We Observed the Higgs (Imposter)?
• The decoupling limit in the Georgi-Machacek model
• The singlet scalar as FIMP dark matter
• Closing in on singlet scalar dark matter: LUX, invisible Higgs decays and gamma-ray lines
• What if the Higgs couplings to W and Z bosons are larger than in the Standard Model?
• Search for anomalous production of prompt same-sign lepton pairs and pair-produced doubly charged Higgs bosons with $\sqrt{s}=8$ TeV $pp$ collisions using the ATLAS detector
• Singlet Scalar Dark Matter: monochromatic gamma rays and metastable vacua
• Unitarity bounds in the Higgs model including triplet fields with custodial symmetry
• The Simplest Dark-Matter Model, CDMS II Results, and Higgs Detection at LHC
• Invisible Higgs Decay Width vs. Dark Matter Direct Detection Cross Section in Higgs Portal Dark Matter Models
• Testing the custodial symmetry in the Higgs sector of the Georgi-Machacek model
• Multi-Scalar-Singlet Extension of the Standard Model - the Case for Dark Matter and an Invisible Higgs Boson
• Hints of Standard Model Higgs Boson at the LHC and Light Dark Matter Searches
• Extending two-Higgs-doublet models by a singlet scalar field - the Case for Dark Matter
• Global Study of the Simplest Scalar Phantom Dark Matter Model
• A simplified 2HDM with a scalar dark matter and the galactic center gamma-ray excess
• The Next-to-Minimal Two Higgs Doublet Model
• A Natural Two-Higgs-Doublet Model
• Triplet Higgs boson collider phenomenology after the LHC
• Pinning down Higgs triplets at the LHC
• Indirect constraints on the Georgi-Machacek model and implications for Higgs couplings
• Three-body decays of Higgs bosons at LEP2 and application to a hidden fermiophobic Higgs
• Direct and Indirect Singlet Scalar Dark Matter Detection in the Lepton-Specific two-Higgs-doublet Model
• Probing exotic Higgs sectors from the precise measurement of Higgs boson couplings
• Antimatter signals of singlet scalar dark matter
• Exploring Higgs Triplet Models via Vector Boson Scattering at the LHC
• Novel Constraint on Parameter Space of the Georgi-Machacek Model by Current LHC Data
• All the generalized Georgi-Machacek models
• Higgs couplings in a model with triplets
• The Higgs boson mixes with an SU(2) septet representation
• Revisiting Theories with Enhanced Higgs Couplings to Weak Gauge Bosons
• Revealing the electroweak properties of a new scalar resonance
• Constraints on New Physics from Baryogenesis and Large Hadron Collider Data
• Electroweak Phase Transition in Georgi-Machacek Model
• Enhancements of weak gauge boson scattering processes at the CERN LHC
• LHC Run-I constraint on the mass of doubly charged Higgs bosons in the same-sign diboson decay scenario
• Implications of the observation of dark matter self-interactions for singlet scalar dark matter
• Properties and searches of the exotic neutral Higgs bosons in the Georgi-Machacek model
• Low-Mass Dark-Matter Hint from CDMS II, Higgs Boson at the LHC, and Darkon Models
• Dark matter annihilation through a lepton-specific Higgs boson
• Learning what the Higgs boson is mixed with
• Singlet Dark Matter in Type II Two Higgs Doublet Model
• Supersymmetric Custodial Triplets
• 2HDM Portal Dark Matter: LHC data and the Fermi-LAT 135 GeV Line
• Surveying the Scope of the SU(2)_L Scalar Septet Sector
• Supersymmetric Custodial Higgs Triplets and the Breaking of Universality
• Double Higgs production at LHC, see-saw type II and Georgi-Machacek model
• Suppression of $H\to VV$ decay channels in the Georgi-Machacek model

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• Spontaneous mirror left-right symmetry breaking for leptogenesis parametrized by Majorana neutrino mass matrix
• Gauge field and brane-localized kinetic terms on the chiral square
• Revisiting the decoupling limit of the Georgi-Machacek model with a scalar singlet
• Heavy Higgs boson Searches at the LHC in the light of a Left-Right Symmetric Model
• Exotic Decays and Collider Signatures of pNGB Scalars in the $SU(5)/SO(5)$ Composite Higgs Model