Holographic Electroweak Symmetry Breaking from D-branes

Details Holographic Electroweak Symmetry Breaking from D-branes Holographic Electroweak Symmetry Breaking from D-branes

2007-04-24

arxiv.org/abs/0704.3084v2

Phys.Rev.D76:015015,2007

Physics

High Energy Physics

High Energy Physics - Theory

REVTeX, 25 pages, 8 eps figures, version published in PRD

Scientific paper

10.1103/PhysRevD.76.015015

We observe several interesting phenomena in a technicolor-like model of electroweak symmetry breaking based on the D4-D8-D8bar system of Sakai and Sugimoto. The benefit of holographic models based on D-brane configurations is that both sides of the holographic duality are well understood. We find that the lightest technicolor resonances contribute negatively to the Peskin-Takeuchi S-parameter, but heavy resonances do not decouple and lead generically to large, positive values of S, consistent with standard estimates in QCD-like theories. We study how the S parameter and the masses and decay constants of the vector and axial-vector techni-resonances vary over a one-parameter family of D8-brane configurations. We discuss possibilities for the consistent truncation of the theory to the first few resonances and suggest some generic predictions of stringy holographic technicolor models.

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