A 125 GeV composite Higgs boson versus flavour and electroweak precision tests

Abstract

A composite Higgs boson of 125 GeV mass, only mildly fine-tuned, requires top partners with a semi-perturbative coupling and a mass not greater than about a TeV. We analyze the strong constraints on such picture arising from flavour and electroweak precision tests in models of partial compositeness. We consider different representations for the composite fermions and compare the case of an anarchic flavour structure to models with a U(3)^3 and U(2)^3 flavour symmetry. Although non trivially, some models emerge that look capable of accommodating a 125 GeV Higgs boson with top partners in an interesting mass range for discovery at the LHC as well as associated flavour signals.

28 pages, 12 tables. v2: clarifications and references added, discussion in appendix E extended, numerical glitches in tables 4 and 8 corrected, conclusions unchanged

References in corpus (9)

• A custodial symmetry for Zbb
• The Electroweak Fit of the Standard Model after the Discovery of a New Boson at the LHC
• The Flavor of the Composite Pseudo-Goldstone Higgs
• Delta F=2 Observables and Fine-Tuning in a Warped Extra Dimension with Custodial Protection
• On the Tuning and the Mass of the Composite Higgs
• Implications of a Light Higgs in Composite Models
• A GIM Mechanism from Extra Dimensions
• Cornering New Physics in b --> s Transitions
• Composite MFV and Beyond

Cited by in corpus (55)

• The Composite Nambu-Goldstone Higgs
• Effective Lagrangian for a light Higgs-like scalar
• Composite Higgses
• Hadronic vacuum polarization: $(g-2{)}_{\mu }$ versus global electroweak fits
• B-decay Anomalies in a Composite Leptoquark Model
• Light top partners and precision physics
• Violation of lepton flavour universality in composite Higgs models
• Addressing the B-physics anomalies in a fundamental Composite Higgs Model
• Probing New Physics with the B_s to μ+ μ- Time-Dependent Rate
• B-decay anomalies in Pati-Salam SU(4)
• A Natural origin for the LHCb anomalies
• Fundamental Composite 2HDM: SU(N) with 4 flavours
• Flavor Physics and Flavor Anomalies in Minimal Fundamental Partial Compositeness
• Anatomy of flavour-changing Z couplings in models with partial compositeness
• Flavor hierarchies from dynamical scales
• Direct and indirect signals of natural composite Higgs models
• Modified Higgs Physics from Composite Light Flavors
• Anatomy of $b\to c\tau \nu$ anomalies
• Effective theories of universal theories
• Fundamental partial compositeness
• LHC Signals from Cascade Decays of Warped Vector Resonances
• Higgs Couplings in Composite Models
• Strong Signatures of Right-Handed Compositeness
• A bound on the charm chromo-EDM and its implications
• On Flavour and Naturalness of Composite Higgs Models
• Vector-like Bottom Quarks in Composite Higgs Models
• Flavor Universal Resonances and Warped Gravity
• Can we reach the Zeptouniverse with rare K and B_{s,d} decays?
• Dipole operator constraints on composite Higgs models
• Composite Charge 8/3 Resonances at the LHC
• The S parameter for a Light Composite Higgs: a Dispersion Relation Approach
• Warped Seesaw is Physically Inverted
• From B-meson anomalies to Kaon physics with scalar leptoquarks
• Composite spin-1 resonances at the LHC
• The top-quark window on compositeness at future lepton colliders
• The Effect of Composite Resonances on Higgs decay into two photons
• Electroweak symmetry breaking and collider signatures in the next-to-minimal composite Higgs model
• E6 inspired composite Higgs model
• Lepton Flavour Violation in Composite Higgs Models
• Fermion Masses Through Condensation in Spacetimes with Torsion
• Probing light top partners with CP violation
• Probing Top-quark Operators with Precision Electroweak Measurements
• Higgs boson emerging from the dark
• Flavour issues in warped custodial models: $B$ anomalies and rare $K$ decays
• A Concrete Composite 2-Higgs Doublet Model
• Lepton-flavor universality limits in warped space
• Composite Higgs and leptoquarks from a simple group
• A new look at the theory uncertainty of epsilon_K
• Top partner-resonance interplay in a composite Higgs framework
• LHC signatures of neutral pseudo-Goldstone boson in the E6CHM
• Exploring the Flavor Symmetry Landscape
• Little flavor: A model of weak-scale flavor physics
• Photon Cascade Decay of the Warped Graviton at LHC14 and a 100 TeV Hadron Collider
• LHC vector resonance searches in the $t\bar{t}Z$ final state
• Constraints on lepton-flavor mixing with third-generation new physics