Spectroscopy of SU(4) composite Higgs theory with two distinct fermion representations

Venkitesh Ayyar, Thomas Degrand, Maarten Golterman, Daniel C. Hackett, William I. Jay, Ethan T. Neil, Yigal Shamir, Benjamin Svetitsky

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69 Scopus citations

Abstract

We have simulated the SU(4) lattice gauge theory coupled to dynamical fermions in the fundamental and two-index antisymmetric (sextet) representations simultaneously. Such theories arise naturally in the context of composite Higgs models that include a partially composite top quark. We describe the low-lying meson spectrum of the theory and fit the pseudoscalar masses and decay constants to chiral perturbation theory. We infer as well the mass and decay constant of the Goldstone boson corresponding to the nonanomalous U(1) symmetry of the model. Our results are broadly consistent with large-Nc scaling and vector-meson dominance.

Original languageEnglish
Article number075017
JournalPhysical Review D
Volume97
Issue number7
DOIs
StatePublished - 1 Apr 2018

Funding

FundersFunder number
Colorado State University
Research Promotion Foundation
U.S. Department of Energy
University of Colorado Boulder
Office of Science
European Regional Development Fund
Partnership for Advanced Computing in Europe AISBLDE-SC0010005, DE-SC0013682
Israel Science FoundationDE-SC0012704, 449/13
National Science FoundationACI-1532235, ACI-1532236, 1532236

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