Beyond the minimal composite Higgs model

By B. Gripaios, A. Pomarol, F. Riva, J. Serra. 2009

346 citations recorded by the source corpus.

The Higgs spectrum of the minimal composite Higgs model, based on the SO(5)/SO(4) coset, consists of a unique Higgs doublet whose phenomenology does not differ greatly from the Standard Model (SM). Nevertheless, extensions beyond this minimal coset structure exhibit a richer Higgs spectrum and therefore very different Higgs physics. We explore one of these extensions, the SO(6)/SO(5) model, whose Higgs spectrum contains a CP-odd singlet scalar, η, in addition to the Higgs doublet. Due to the pseudo-Nambu- Goldstone nature of these Higgs bosons, their physical properties can be derived from symmetry considerations alone. We find that the mass of η can be naturally light, opening up the possibility that the SM Higgs decays predominantly to the singlet, and therefore lowering the LEP bound on its mass to 86GeV. We also show that η can have interesting consequences in flavour-violating processes, as well as induce spontaneous CP-violation in the Higgs sector. The model can also have anomalies, giving rise to interactions between the SM gauge bosons and η which, if measured at the LHC, would give quantitative information about the structure of the high energy theory.

Subfields: Nuclear and High Energy Physics, Political Science and International Relations

View Paper: https://www.semanticscholar.org/paper/52a4ee50f857538de1305e0f95fa123c36e8ea28

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Nuclear and High Energy Physics

1. A. Wulzer
2. G. Panico
3. M. Redi
4. Andrea Tesi
5. R. Rattazzi
6. Veronica Sanz
7. T. You
8. John Ellis

In Political Science and International Relations

1. G. Ferretti
2. M. Redi
3. A. Wulzer
4. G. Panico
5. G. Giudice
6. Andrea Tesi

Citations in the corpus

• The Composite Nambu-Goldstone Higgs (2015, background): “See [51, 52] for non-minimal composite Higgs constructions where additional Higgs scalars emerge.”
• A pseudoscalar decaying to photon pairs in the early LHC Run 2 data (2015, background): “It is possible that in specific models cη can vanish due to accidental symmetries [32, 36].”
• Fermionic UV completions of composite Higgs models (2013, background): “Models of the type SU(4)/Sp(4) ≡ SO(6)/SO(5) have been investigated in [24].”
• Minimal conformal technicolor and precision electroweak tests (2010, methodology): “[19] analyzes a 5D model with the same coset, but considers a different stabilizing potential with different phenomenology.”
• On the interpretation of a possible ∼ 750 GeV particle decaying into γγ (2015, methodology): “or a pseudo-Goldstone boson from symmetry breaking in a composite Higgs model [53, 54].”
• What is the γγ resonance at 750 GeV? (2015, methodology): “For example in the SO(6)/ SO(5) model [39], the singlet PNGB (the η state) couples to fermions as gηff ∼ mf f cot θ , (39)”