A Near-Conformal Composite Higgs Model

We analyze a composite Higgs model based on the confining \(SU(3)\) gauge theory with \(N_f = 8\) Dirac fermions in the fundamental representation. This gauge theory has been studied on the lattice and shown to be well described by a dilaton effective field theory (EFT). Here we modify the EFT by as...

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Bibliographic Details
Published inarXiv.org
Main Authors Appelquist, Thomas, Ingoldby, James, Piai, Maurizio
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 31.03.2021
Subjects
Broken symmetry
Dilatons
Electroweak model
Fermions
Field theory
Gauge theory
Higgs bosons
Phenomenology
Physics - High Energy Physics - Lattice
Physics - High Energy Physics - Phenomenology
Quantum numbers
Quarks
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Summary:We analyze a composite Higgs model based on the confining \(SU(3)\) gauge theory with \(N_f = 8\) Dirac fermions in the fundamental representation. This gauge theory has been studied on the lattice and shown to be well described by a dilaton effective field theory (EFT). Here we modify the EFT by assigning standard-model quantum numbers such that four of the composite pseudo-Nambu-Goldstone boson (pNGB) fields form the standard-model Higgs doublet, by coupling it to the top quark, and by adding to the potential a term that triggers electroweak symmetry breaking. The model contains a pNGB Higgs boson, a set of heavier pNGBs, and an approximate dilaton in the same mass range. We study the phenomenology of the model, and discuss the amount of tuning required to insure consistency with current direct and indirect bounds on new physics, highlighting the role of the dilaton field.
ISSN:2331-8422
DOI:10.48550/arxiv.2012.09698