Negative S parameter from holographic technicolor.

  title={Negative S parameter from holographic technicolor.},
  author={Johannes Hirn and Veronica Sanz},
  journal={Physical review letters},
  volume={97 12},
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… 

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