Any Room Left for Technicolor? Holographic Studies of NJL Assisted Technicolour

TL;DR

This paper uses holographic models to analyze NJL-assisted technicolor theories, exploring their meson spectra and potential LHC signatures, and compares them with walking technicolor models to identify viable parameter spaces.

Contribution

It extends holographic analysis to NJL-assisted technicolor models, providing new predictions for meson spectra and collider signatures beyond previous walking technicolor studies.

Findings

Predicted vector and axial vector meson spectra for various models.

Identified parameter regions compatible with current LHC constraints.

Suggested new collider signatures for future exploration.

Abstract

We use a holographic description of technicolor dynamics to study gauge theories that only break chiral symmetry when aided by a strong four fermion interaction. These Nambu-Jona-Lasinio (NJL) assisted technicolor models provide examples of different dynamics from walking technicolor which can, by tuning, generate a light higgs like $\sigma$ meson. We compute the vector meson ($\rho$) and axial vector meson (A) spectrum for a variety of models with techni-quarks in the fundamental representation, enlarging the available parameter space over a previous analysis of walking theories. These predictions determine the parameter space of a low energy effective description where LHC constraints from dilepton channels have already been applied. Many of the models with low numbers of electroweak doublets still lie beyond current constraints and motivate exploration of new signatures beyond dilepton for LHC and a 100 TeV proton collider.