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arXiv · 0704.3084

Holographic Electroweak Symmetry Breaking from D-branes

Christopher D. Carone·Joshua Erlich·Marc Sher
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Abstract

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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Christopher D. Carone, Joshua Erlich, Marc Sher. 2007-06-21. Holographic Electroweak Symmetry Breaking from D-branes. https://doi.org/10.1103/physrevd.76.015015

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