Hirn Johannes, Sanz Verónica
IFIC-Universitat de València, Edifici d'Instituts de Paterna, Apt. Correus 22085, 46071 València, Spain.
Phys Rev Lett. 2006 Sep 22;97(12):121803. doi: 10.1103/PhysRevLett.97.121803.
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 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.
我们提出了一类新的五维模型——全息技术色模型，它满足了作为电弱标度下可理解的四维强动力学候选者的基本要求。它是首个能够提供消失甚至负的树图水平S参数的类技术色模型，避免了任何关于其符号的不可行定理。该模型是在大N极限下描述的。因此，S是可计算的：来自边界项的可能修正遵循1/N的抑制，并且费米子质量的产生和S参数问题是分开的。我们研究了该模型的四维对偶，它可能类似于具有大反常维度的行走技术色模型。
