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arXiv 0704.3084hep-thhep-ph
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D-膜的全息电弱对称破缺

Holographic Electroweak Symmetry Breaking from D-branes

Christopher D. Carone, Joshua Erlich, Marc Sher

摘要:

在基于Sakai和Sugimoto的D4-D8-D8条系统的类彩色模型中,我们观察到了几个有趣的现象。基于D膜结构的全息模型的好处是全息对偶的两面都被很好地理解了。我们发现,最轻的人工色共振有助于消极的Peskin-Takeuchi S-参数,但重共振不去耦,并导致一般的大,正值的S,符合标准的估计在QCD类理论。我们研究了S参数和质量和衰减常数的矢量和轴向矢量技术共振在一个单参数家庭的D8-膜配置的变化。我们讨论的可能性一致截断的理论的前几个共振,并提出一些通用的预测弦全息technicolor模型。

英文摘要:

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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