Electroweak interactions and dark baryons in the sextet BSM model with a composite Higgs particle

TL;DR

This paper explores a strongly coupled BSM gauge theory with sextet fermions, focusing on its potential to produce a composite Higgs and dark baryons, supported by lattice simulations of the baryon spectrum.

Contribution

It provides the first non-perturbative lattice results on the baryon spectrum of the sextet BSM model, crucial for dark matter and early universe studies.

Findings

First numerical results on baryon spectrum from lattice simulations.

Identification of quantum numbers of composite baryons.

Insights into dark matter contributions from the sextet BSM model.

Abstract

The Electroweak interactions of a strongly coupled gauge theory are discussed with outlook beyond the Standard Model (BSM) under global and gauge anomaly constraints. The theory is built on a minimal massless fermion doublet of the SU(2) BSM flavor group (bsm-flavor) with a confining gauge force at the TeV scale in the two-index symmetric (sextet) representation of the BSM SU(3) color gauge group (bsm-color). The intriguing possibility of near-conformal sextet gauge dynamics could lead to the minimal realization of the composite Higgs mechanism with a light $0^{++}$ scalar, far separated from strongly coupled resonances of the confining gauge force in the 2-3 TeV range, distinct from Higgsless Technicolor. In previous publications we have presented results for the meson spectrum of the theory, including the light composite scalar, perhaps the emergent Higgs impostor. Here we discuss the critically important role of the baryon spectrum in the sextet model investigating its compatibility with what we know about thermal evolution of the early Universe including its galactic and terrestrial relics. For an important application, we report the first numerical results on the baryon spectrum of this theory from non-perturbative lattice simulations with baryon correlators in the staggered fermion implementation of the strongly coupled gauge sector. The quantum numbers of composite baryons and their spectroscopy from lattice simulations are required inputs for exploring dark matter contributions of the sextet BSM model, as outlined for future work.