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Negative S parameter from holographic technicolor.

Authors
  • Hirn, Johannes
  • Sanz, Verónica
Type
Published Article
Journal
Physical review letters
Publication Date
Sep 22, 2006
Volume
97
Issue
12
Pages
121803–121803
Identifiers
PMID: 17025952
Source
Medline
License
Unknown

Abstract

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 fermion masses and the S parameter issue do split up. We investigate the model's 4D dual, probably walking Technicolor-like with a large anomalous dimension.

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