Holographic Techni-dilaton, or Conformal Higgs

TL;DR

This paper develops a holographic model for walking/conformal technicolor, incorporating gluon effects, and predicts the masses of techni-mesons and the conformal Higgs, showing gluon contributions lower the techni-dilaton mass.

Contribution

It introduces a bottom-up holographic model including gluon condensation effects to study techni-meson spectra and the techni-dilaton mass in conformal technicolor theories.

Findings

Techni-dilaton mass around 600 GeV for S ≈ 0.1

Techni-ρ and a₁ mesons around 4 TeV

Gluon effects reduce the techni-dilaton mass

Abstract

We study a holographic model dual to walking/conformal technicolor (W/C TC) deforming a hard-wall type of bottom-up setup by including effects from techni-gluon condensation. We calculate masses of (techni-) $\rho$ meson, $a_1$ meson, and flavor/chiral-singlet scalar meson identified with techni-dilaton (TD)/conformal Higgs boson, as well as the $S$ parameter. It is shown that gluon contributions and large anomalous dimension tend to decrease specifically mass of the TD. In the typical model with $S \simeq 0.1$, we find $m_{\rm TD} \simeq 600$ GeV, while $m_\rho,m_{a_1} \simeq 4 {\rm TeV}$.