# Negative S parameter from holographic technicolor.

@article{Hirn2006NegativeSP, title={Negative S parameter from holographic technicolor.}, author={Johannes Hirn and Veronica Sanz}, journal={Physical review letters}, year={2006}, volume={97 12}, pages={ 121803 } }

We present a new class of 5D models, Holographic Technicolor, which fulfills the basic requirements for a candidate of comprehensible 4D strong dynamics at the electroweak scale. It is the first Technicolor-like model able to provide a vanishing or even negative tree-level S parameter, avoiding any no-go theorem on its sign. The model is described in the large-N regime. S is therefore computable: possible corrections coming from boundary terms follow the 1/N suppression, and generation of… Expand

#### Topics from this paper

#### 89 Citations

Holographic bosonic technicolor

- Physics
- 2007

We consider a technicolor model in which the expectation value of an additional, possibly composite, scalar field is responsible for the generation of fermion masses. We define the dynamics of the… Expand

Combined Constraints on Holographic Bosonic Technicolor

- Physics
- 2010

We consider a model of strong electroweak symmetry breaking in which the expectation value of an additional, possibly composite, scalar field is responsible for the generation of fermion masses. The… Expand

The S-parameter in holographic technicolor models

- Physics
- 2007

We study the S parameter, considering especially its sign, in models of elec- troweak symmetry breaking (EWSB) in extra dimensions, with fermions localized near the UV brane. Such models are… Expand

Holographic technicolor model and dark matter

- Physics
- 2019

We investigate the strongly coupled minimal walking technicolor model (MWT) in the framework of a bottom-up holographic model, where the global $SU(4)$ symmetry breaks to $SO(4)$ subgroup. In the… Expand

S-parameter, technimesons, and phase transitions in holographic tachyon DBI models.

- Physics
- 2013

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… Expand

Minimal walking technicolor: Setup for collider physics

- Physics
- 2007

Different theoretical and phenomenological aspects of the minimal and nonminimal walking technicolor theories have recently been studied. The goal here is to make the models ready for collider… Expand

Constraining holographic technicolor

- Physics
- 2012

Abstract We obtain a new bound on the value of Peskin–Takeuchi S parameter in a wide class of bottom-up holographic models for technicolor. Namely, we show that weakly coupled holographic description… Expand

Holographic Technidilaton and LHC Searches

- Physics
- 2012

We analyze in detail the phenomenology of a model of dynamical electroweak symmetry breaking inspired by walking technicolor, by using the techniques of the bottom-up approach to holography. The… Expand

Holographic technicolor models and their S-parameter

- Physics
- 2009

We study the Peskin-Takeuchi S-parameter of holographic technicolor models. We present the recipe for computing the parameter in a generalized holographic setup. We then apply it to several… Expand

Holographic walking technicolor from D-branes

- Physics
- 2011

Abstract We investigate a model of dynamical electroweak symmetry breaking via a dual gravitational description. The gravity dual is obtained by embedding a D 7 – D 7 ¯ pair of branes into a type IIB… Expand