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- Title
Dilaton Effective Field Theory.
- Authors
Appelquist, Thomas; Ingoldby, James; Piai, Maurizio
- Abstract
We review and extend recent studies of dilaton effective field theory (dEFT) that provide a framework for the description of the Higgs boson as a composite structure. We first describe the dEFT as applied to lattice data for a class of gauge theories with near-conformal infrared behavior. This includes the dilaton associated with the spontaneous breaking of (approximate) scale invariance and a set of pseudo-Nambu–Goldstone bosons (pNGBs) associated with the spontaneous breaking of an (approximate) internal global symmetry. The theory contains two small symmetry-breaking parameters. We display the leading-order (LO) Lagrangian and review its fit to lattice data for the S U (3) gauge theory with N f = 8 Dirac fermions in the fundamental representation. We then develop power-counting rules to identify the corrections emerging at next-to-leading order (NLO) in the dEFT action. We list the NLO operators that appear and provide estimates for the coefficients. We comment on implications for composite Higgs model building.
- Subjects
DILATON; HIGGS bosons; NAMBU-Goldstone bosons; BOSONS; COMPOSITE structures; FERMIONS
- Publication
Universe (2218-1997), 2023, Vol 9, Issue 1, p10
- ISSN
2218-1997
- Publication type
Article
- DOI
10.3390/universe9010010