A "Littlest Higgs" Model with Custodial SU(2) Symmetry

Abstract

In this note, a ``littlest higgs'' model is presented which has an approximate custodial SU(2) symmetry. The model is based on the coset space $SO(9)/(SO(5)\times SO(4))$. The light pseudo-goldstone bosons of the theory include a {\it single} higgs doublet below a TeV and a set of three $SU(2{)}_W$ triplets and an electroweak singlet in the TeV range. All of these scalars obtain approximately custodial SU(2) preserving vacuum expectation values. This model addresses a defect in the earlier $SO(5)\times SU(2)\times U(1)$ moose model, with the only extra complication being an extended top sector. Some of the precision electroweak observables are computed and do not deviate appreciably from Standard Model predictions. In an S-T oblique analysis, the dominant non-Standard Model contributions are the extended top sector and higgs doublet contributions. In conclusion, a wide range of higgs masses is allowed in a large region of parameter space consistent with naturalness, where large higgs masses requires some mild custodial SU(2) violation from the extended top sector.

22 pages + 8 figures; JHEP style, added references and extra discussion on size of T contributions, as well as some other minor clarifications. Version to appear in JHEP

References in corpus (11)

• Phenomenology of the Little Higgs Model
• Variations of Little Higgs Models and their Electroweak Constraints
• The Little Higgs from a Simple Group
• Little Higgs and Custodial SU(2)
• A Simple Model of two Little Higgses
• Loop induced decays of the Little Higgs: H --> gg, gamma gamma
• What Precision Electroweak Physics Says About the SU(6)/Sp(6) Little Higgs
• Collider Tests of the Little Higgs Model
• Higgs production and decay in the little Higgs model
• Dynamical Electroweak Superconductivity from a Composite Little Higgs
• Electroweak Precision Tests of Little Higgs Theories

Cited by in corpus (142)

• The Strongly-Interacting Light Higgs
• Little Higgs Review
• TeV Symmetry and the Little Hierarchy Problem
• Little Hierarchy, Little Higgses, and a Little Symmetry
• Little Higgs Models and Their Phenomenology
• Flavour physics of leptons and dipole moments
• Composite Higgses
• Phenomenology of the Littlest Higgs with T-Parity
• Probing the Standard Model with Higgs signal rates from the Tevatron, the LHC and a future ILC
• T Parity and the Littlest Higgs
• Folded Supersymmetry and the LEP Paradox
• Top Quarks and Electroweak Symmetry Breaking in Little Higgs Models
• One-loop Radiative Corrections to the rho Parameter in the Littlest Higgs Model
• A Twin Higgs Model from Left-Right Symmetry
• The Simplest Little Higgs
• Theoretical Constraints on the Higgs Effective Couplings
• The Low-Energy Structure of Little Higgs Models
• Little Higgs and Custodial SU(2)
• Physics searches at the LHC
• Top Partners in Little Higgs Theories with T-parity
• The decoupling limit in the Georgi-Machacek model
• Smoking-gun signatures of little Higgs models
• Little-Higgs corrections to precision data after LEP2
• The Intermediate Higgs
• A Composite Little Higgs Model
• Probing top-partners in Higgs + jets
• Collider aspects of flavour physics at high Q
• Testing neutrino masses in little Higgs models via discovery of doubly charged Higgs at LHC
• Indirect constraints on the Georgi-Machacek model and implications for Higgs couplings
• Scales of Fermion Mass Generation and Electroweak Symmetry Breaking
• Unitarity of Little Higgs Models Signals New Physics of UV Completion
• Pseudo-axions in Little Higgs models
• Little Higgs Models and Precision Electroweak Data
• Neutrino masses and lepton-number violation in the Littlest Higgs scenario
• All the generalized Georgi-Machacek models
• Lepton flavour violation in The Little Higgs model
• Little Higgs Models and Electroweak Measurements
• Higgs Triplets and Limits from Precision Measurements
• Higgs couplings in a model with triplets
• Higgs-pair Production in Littlest Higgs Model with T-parity
• Revisiting Theories with Enhanced Higgs Couplings to Weak Gauge Bosons
• On the production of a composite Higgs boson
• Search for charged Higgs bosons produced in vector boson fusion processes and decaying into a pair of W and Z bosons using proton-proton collisions at sqrt(s) = 13 TeV
• A weakly constrained W' at the early LHC
• Alternatives to an Elementary Higgs
• The Bestest Little Higgs
• Little Higgs theory confronted with the LHC Higgs data
• Naturally heavy superpartners and a Little Higgs
• Particle-Antiparticle Mixing, ε_K and the Unitarity Triangle in the Littlest Higgs Model
• Constraining Top partner and Naturalness at the LHC and TLEP
• Muon anomalous magnetic moment and the heavy photon in a little Higgs model
• Electroweak Baryogenesis with a Pseudo-Goldstone Higgs
• The Littlest Higgs in Anti-de Sitter Space
• Properties and searches of the exotic neutral Higgs bosons in the Georgi-Machacek model
• Automatic predictions in the Georgi-Machacek model at next-to-leading order accuracy
• Higgs Triplets, Decoupling, and Precision Measurements
• Distinguishing Little-Higgs Product and Simple Group models at the LHC and ILC
• The Littlest Higgs boson at a photon collider
• Little Technicolor
• Higgs Discovery through Top-Partners using Jet Substructure
• Little Higgses and Turtles
• Higgs boson pair productions in the Georgi-Machacek model at the LHC
• Light pseudoscalar eta and H->eta eta decay in the simplest little Higgs mode
• Higgs-pair Production and Decay in Simplest Little Higgs Model
• Real singlet scalar dark matter extension of the Georgi-Machacek model
• Precision Higgs Measurements: Constraints from New Oblique Corrections
• Scalar decays to $\gamma \gamma$, $Z\gamma$, and $W\gamma$ in the Georgi-Machacek model
• Top Quark FCNC Decay to 125GeV Higgs boson in the Littlest Higgs Model with T-parity
• Custodial symmetry violation in the Georgi-Machacek model
• Production of htt_bar and htT_bar in littlest Higgs model with T-parity
• Determination of Littlest Higgs model parameters at the ILC
• Precision Electroweak Observables in the Minimal Moose Little Higgs Model
• Higgs and Z-boson FCNC decays correlated with B-meson decays in littlest Higgs model with T-parity
• Collective Quartics and Dangerous Singlets in Little Higgs
• Exotic Top Partners and Little Higgs
• Higgs boson decays and production via gluon fusion at LHC in littlest Higgs models with T-parity
• In search of an unbiased temperature estimator for statistically poor X-ray spectra
• Top quark FCNC decays and productions at LHC in littlest Higgs model with T-parity
• Higgs boson productions at LHC as a probe of different littlest Higgs models with T-parity
• Diphoton and Diboson Probes of Fermiophobic Higgs Bosons at the LHC
• Higgs couplings and Naturalness in the littlest Higgs model with T-parity at the LHC and TLEP
• Higgs boson decays in the littlest Higss model
• T-parity, its problems and their solution
• How well can the LHC distinguish between the SM light Higgs scenario, a composite Higgs and the Higgsless case using VV scattering channels?
• Perturbative, Non-Supersymmetric Completions of the Little Higgs
• Associated single photons as signals for a doubly charged scalar at linear e-e- colliders
• The LHC di-photon Higgs signal predicted by little Higgs models
• Distinguishing Supersymmetry From Universal Extra Dimensions or Little Higgs Models With Dark Matter Experiments
• Remarks on analyticity and unitarity in the presence of a Strongly Interacting Light Higgs
• The Study of the contribution of the LHT model to $Zb\bar{b}$ coupling
• Little composite dark matter
• Top Partner Probes of Extended Higgs Sectors
• Probing the gauge bosons $Z^{\prime }$ and $B^{\prime }$ from the Littlest Higgs model in the high-energy linear $e^{+}{e}^{-}$ colliders
• A concise review on some Higgs-related new physics models in light of current experiments
• Vector-Vector scattering at the LHC with two charged leptons and two neutrinos in the final state
• The littlest Higgs is a cruiserweight
• Associated production of a single heavy T-quark in the littlest and simplest little Higgs models
• Portal Effective Theories: A framework for the model independent description of light hidden sector interactions
• Lepton Flavour Violation in Hadron Decays of the Tau Lepton in the Simplest Little Higgs Model
• The Higgs boson and the physics of $WW$ scattering before and after Higgs discovery
• Radiative Electroweak Symmetry Breaking in a Little Higgs Model
• (Reverse) Engineering Vacuum Alignment
• Higgs boson decays and production in the left-right twin Higgs model
• Direct Constraints, Flavor Physics, and Flavor Anomalies in Composite Higgs Models
• Higgs boson production in photon-photon collision at ILC: a comparative study in different little Higgs models
• The littlest Higgs model and Higgs boson associated production with top quark pair at high energy linear $e^{+}{e}^{-}$ collider
• Topology in the Little Higgs Models
• Higgs boson production and decay at $e^{+}{e}^{-}$ colliders as a probe of the Left-Right twin Higgs model
• Left-right twin Higgs model confronted with the latest LHC Higgs data
• Lepton flavor violation within the Simplest Little Higgs model
• Testing Naturalness
• Hidden fine tuning in the quark sector of little higgs models
• Little Higgs model effects at $\gamma \gamma$ collider
• Vacuum Stability in Split Susy and Little Higgs Models
• New Physics Contribution to Neutral Trilinear Gauge Boson Couplings
• Probing lepton flavor violation signal via e+ e- (gamma gamma) ---> l(i) anti-l(j) in the littlest Higgs model with T-parity at the ILC
• Rare Z-decay into light pseudoscalar bosons in the simplest little Higgs model
• A heavy Higgs boson from flavor and electroweak symmetry breaking unification
• Composite Higgs Models with a Hidden Sector
• One-loop effects on top pair production in the littlest Higgs model with T-parity at the LHC
• Charged Higgs Production in Association With W^{\pm} at Large Hadron Colliders
• Phenomenology Beyond the Standard Model
• Phenomenology of the Littlest Higgs model
• Custodial Symmetry (Violation) in SMEFT
• Collective Quartics from Simple Groups
• On-shell $WW\gamma$ vertex in the T-Parity and non T-Parity Littlest Higgs model
• Top quark pair production via $e^{+}{e}^{-}$ collision in the littlest Higgs model with T-parity at the ILC
• Flavor and electroweak symmetry breaking at the TeV scale
• On the electroweak symmetry breaking in the Littlest Higgs model
• Testing the Littlest Higgs Model with T-parity in Bottom Quark Pair Production at High Energy Photon Colliders
• Probing the lightest new gauge boson $B_H$ in the littlest Higgs model via the processes $\gamma \gamma \to f\bar{f}{B}_H$ at the ILC
• Pseudoscalar boson and SM-like Higgs boson productions at LHC in simplest little Higgs model
• Little Higgs and precision electroweak tests
• Axion and PVLAS data in a Little Higgs model
• R_b Constraints on Littlest Higgs Model with T-parity
• The Advantages of Four Dimensions for Composite Higgs Models
• The flavor-changing bottom-strange quark production in the littlest Higgs model with T parity at the ILC
• Associated $Z^0{H}^0$ production with leptonic decays at LHC in next-to-leading order QCD
• One Loop Renormalization of the Littlest Higgs Model
• The production of the new gauge boson $B_H$ via $e^{-}\gamma$ collision in the littlest Higgs model
• Chromomagnetic dipole moment of the top quark in the Bestest Little Higgs model
• One-loop QCD correction to top pair production in the littlest Higgs model with T-parity at the LHC