Modified Higgs Physics from Composite Light Flavors

Abstract

We point out that Higgs rates into gauge bosons can be significantly modified in composite pseudo Nambu--Goldstone boson (pNGB) Higgs models if quarks belonging to the first two generation are relatively composite objects as well. Although the lightness of the latter a priori screen them from the electroweak symmetry breaking sector, we show, in an effective two-site description, that their partners can lead to order one shifts in radiative Higgs couplings to gluons and photons. Moreover, due to the pseudo-Goldstone nature of the Higgs boson, the size of these corrections is completely controlled by the degree of compositeness of the individual light quarks. The current measurements of flavor-blind Higgs decay rates at the LHC thus provide an indirect probe of the flavor structure of the framework of pNGB Higgs compositeness.

28 pages, 9 figures. v2: typo corrected in eq. 22, references added

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• Survey of vector-like fermion extensions of the Standard Model and their phenomenological implications
• Light Higgs and Vector-like Quarks without Prejudice
• Strong Higgs Interactions at a Linear Collider
• Constraining the Charm Yukawa and Higgs-quark Coupling Universality
• What's in the Loop? The Anatomy of Double Higgs Production
• Probing top-partners in Higgs + jets
• Vector-like Fermions and Higgs Effective Field Theory Revisited
• Taming the off-shell Higgs boson
• Prospects for measuring the Higgs coupling to light quarks
• Direct and indirect signals of natural composite Higgs models
• Charming the Higgs
• Leptons in Composite MFV
• Higgs Couplings in Composite Models
• Nonstandard Yukawa Couplings and Higgs Portal Dark Matter
• On Flavour and Naturalness of Composite Higgs Models
• Light Non-degenerate Composite Partners at the LHC
• Vector-like Bottom Quarks in Composite Higgs Models
• Top Partners and Higgs Boson Production
• Dipole operator constraints on composite Higgs models
• Top Partners Searches and Composite Higgs Models
• Composite Charge 8/3 Resonances at the LHC
• Resolving gluon fusion loops at current and future hadron colliders
• The Natural Composite Higgs
• A universally enhanced light-quarks Yukawa couplings paradigm
• Higgs Couplings and Naturalness
• 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
• Composite Higgses with seesaw EWSB
• Probing light top partners with CP violation
• Probing New Physics in Higgs Couplings to Fermions using an Angular Analysis
• Radiative Decays of the Higgs Boson to a Pair of Fermions
• Leptoquark-assisted Singlet-mediated Di-Higgs Production at the LHC
• Constraints on composite quark partners from Higgs searches
• Looking for a vectorlike B quark at LHC using jet substructure
• How large can the Light Quark Yukawa couplings be?
• From Tevatron's top and lepton-based asymmetries to the LHC
• LHC signatures of neutral pseudo-Goldstone boson in the E6CHM
• Baryon asymmetry generation in the E6CHM
• Higgs Physics Beyond the Standard Model
• CP Violation Tests of Alignment Models at LHCII
• Resolving Muon g-2 Anomaly With Partial Compositeness
• The Two Scales of New Physics in Loop-Induced Higgs Couplings
• Collider phenomenology of the 4D~composite Higgs model
• Boosted Higgs Channels