S-parameter, Technimesons, and Phase Transitions in Holographic Tachyon DBI Models

TL;DR

This paper explores holographic models with tachyon DBI actions to understand strongly interacting fermions, phase transitions, and electroweak parameters, providing new insights into technicolor theories and their phenomenology.

Contribution

It introduces a holographic framework based on tachyon DBI actions to analyze technicolor-like models, including phase structure and S-parameter calculations.

Findings

Computed S-parameter and technimeson masses for various potentials.

Analyzed phase transitions at finite temperature and charge density.

Commented on holographic Wilsonian RG in tachyon models.

Abstract

We investigate some phenomenological aspects of the holographic models based on the tachyon Dirac-Born-Infeld action in the AdS space-time. These holographic theories model strongly interacting fermions and feature dynamical mass generation and symmetry breaking. We show that they can be viewed as models of holographic walking technicolor and compute the Peskin-Takeuchi S-parameter and masses of lightest technimesons for a variety of the tachyon potentials. We also investigate the phase structure at finite temperature and charge density. Finally, we comment on the holographic Wilsonian RG in the context of holographic tachyon DBI models.