Dilaton Effective Field Theory
Abstract
We review and extend recent studies of dilaton effective field theory (dEFT) which 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. It 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 gauge theory with 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.
Cite
@article{arxiv.2209.14867,
title = {Dilaton Effective Field Theory},
author = {Thomas Appelquist and James Ingoldby and Maurizio Piai},
journal= {arXiv preprint arXiv:2209.14867},
year = {2022}
}
Comments
14 pages, 1 figure, version accepted for publication