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Fermion Masses in Emergent Electroweak Symmetry Breaking
High Energy Physics - Phenomenology · Submitted 16 Jun 2010
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim Instead the Standard Model with massive fermions and $W,Z$ gauge bosons is an effective chiral Lagrangian for some underlying confining strong dynamics at the TeV scale, where mass is generated without a Higgs mechanism.
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The abstract, sentence by sentence
We consider the generation of fermion masses in an emergent model of electroweak symmetry breaking with composite $W,Z$ gauge bosons. A universal bulk fermion profile in a warped extra dimension is used for all fermion flavors. Electroweak symmetry is broken at the UV (or Planck) scale where boundary mass terms are added to generate the fermion flavor structure. This leads to flavor-dependent nonuniversality in the gauge couplings. The effects are suppressed for the light fermion generations but are enhanced for the top quark where the $Zt{\bar t}$ and $Wt{\bar b}$ couplings can deviate at the $10-20%$ level in the minimal setup. By the AdS/CFT correspondence our model implies that electroweak symmetry is not a fundamental gauge symmetry. Instead the Standard Model with massive fermions and $W,Z$ gauge bosons is an effective chiral Lagrangian for some underlying confining strong dynamics at the TeV scale, where mass is generated without a Higgs mechanism.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We consider the generation of fermion masses in an emergent model of electroweak symmetry breaking with composite $W,Z$ gauge bosons. | contribution 0.91 | 0.59 | 0.05 | unclear 0.59 |
| s1 | A universal bulk fermion profile in a warped extra dimension is used for all fermion flavors. | method 0.98 | 0.70 | 0.03 | asserted 1.00 |
| s2 | Electroweak symmetry is broken at the UV (or Planck) scale where boundary mass terms are added to generate the fermion flavor structure. | method 0.93 | 0.55 | 0.07 | asserted 0.98 |
| s3 | This leads to flavor-dependent nonuniversality in the gauge couplings. | result 0.97 | 0.77 | 0.10 | asserted 1.00 |
| s4 | The effects are suppressed for the light fermion generations but are enhanced for the top quark where the $Zt{\bar t}$ and $Wt{\bar b}$ couplings can deviate at the $10-20%$ level in the minimal setup. | result 1.00 | 0.83 | 0.17 | asserted 0.54 |
| s5 | By the AdS/CFT correspondence our model implies that electroweak symmetry is not a fundamental gauge symmetry. | interpretation 1.00 | 0.57 | 0.29 | asserted 0.93 |
| s6 | Instead the Standard Model with massive fermions and $W,Z$ gauge bosons is an effective chiral Lagrangian for some underlying confining strong dynamics at the TeV scale, where mass is generated without a Higgs mechanism. | interpretation 1.00 | 0.59 | 0.65 | asserted 0.98 |
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The paper
Original abstract
We consider the generation of fermion masses in an emergent model of electroweak symmetry breaking with composite $W,Z$ gauge bosons. A universal bulk fermion profile in a warped extra dimension is used for all fermion flavors. Electroweak symmetry is broken at the UV (or Planck) scale where boundary mass terms are added to generate the fermion flavor structure. This leads to flavor-dependent nonuniversality in the gauge couplings. The effects are suppressed for the light fermion generations but are enhanced for the top quark where the $Zt{\bar t}$ and $Wt{\bar b}$ couplings can deviate at the $10-20%$ level in the minimal setup. By the AdS/CFT correspondence our model implies that electroweak symmetry is not a fundamental gauge symmetry. Instead the Standard Model with massive fermions and $W,Z$ gauge bosons is an effective chiral Lagrangian for some underlying confining strong dynamics at the TeV scale, where mass is generated without a Higgs mechanism.
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References
How the literature uses it
1 arXiv paper cite this in 2 sentences
What it cites · 38 sentences without a confident label
Uses data or values from 1 paper
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Using the $ζ_L,ζ_Y$ values in [ref] , which is the benchmark point for a good fit to electroweak precision observables, we find that the rescaling is about $70$.
Emergent Electroweak Symmetry Breaking with Composite W, Z Bosons · Matching to the SM gauge couplings · 1.00
Compares with 3 papers
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It differs from the usual Higgsless model [ref] in that the $W,Z$ bosons are identified as the lowest-lying KK states peaking towards the IR brane (as opposed to the flat zero modes) and therefore via the AdS/CFT dictionary [ref] are composite.
Towards a Realistic Model of Higgsless Electroweak Symmetry Breaking · The 5D Emergent Model · 0.94
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It differs from the usual Higgsless model [ref] in that the $W,Z$ bosons are identified as the lowest-lying KK states peaking towards the IR brane (as opposed to the flat zero modes) and therefore via the AdS/CFT dictionary [ref] are composite.
Holography and Phenomenology · The 5D Emergent Model · 0.94
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It differs from the usual Higgsless model [ref] in that the $W,Z$ bosons are identified as the lowest-lying KK states peaking towards the IR brane (as opposed to the flat zero modes) and therefore via the AdS/CFT dictionary [ref] are composite.
The Large N Limit of Superconformal Field Theories and Supergravity · The 5D Emergent Model · 0.94
Cites as support 1 paper
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Note that large brane kinetic terms are required, but as shown in Ref. [ref] they are perturbatively consistent.
Casimir Energy and Radius Stabilization in Five and Six Dimensional Orbifolds · Matching to the SM gauge couplings · 0.99
Cites as background 2 papers
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As discussed in [ref] , the electroweak precision observables most sensitive to the anomalous top coupling are $ϵ_1$ (related to the $T$-parameter), and $ϵ_b$ (related to the $Zbb̅$ coupling).
Model Independent Constraints Among the Wtb, Zbb, and Ztt Couplings · Electroweak Precision Analysis · 0.81
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As discussed in [ref] , the electroweak precision observables most sensitive to the anomalous top coupling are $ϵ_1$ (related to the $T$-parameter), and $ϵ_b$ (related to the $Zbb̅$ coupling).
Analysis of tbW and ttZ couplings from CLEO and LEP/SLC data · Electroweak Precision Analysis · 0.81
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