2020/12/31 by Thomas Appelquist, James Ingoldby, Maurizio Piai · 42 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Dilaton #Electroweak interaction #Gauge (firearms) #Gauge boson #Gauge theory #Goldstone boson #Higgs boson #Higgs field #Higgs mechanism #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Spontaneous symmetry breaking #Standard Model (mathematical formulation) #Symmetry breaking #Technicolor #Theoretical physics #hep-lat #hep-ph
paper · pdf · doi:10.1103/physrevlett.126.191804
published in Physical Review Letters 126(19), 191804 (American Physical Society) · 7 pages, 1 figure. Typos corrected and references added
arxiv created 2021/03/31 · openalex publication_date 2021/05/14 · arxiv updated 2021/05/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We analyze a composite Higgs model based on the confining SU(3) gauge theory with Nf=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 ensure consistency with current direct and indirect bounds on new physics, highlighting the role of the dilaton field.