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arXiv 0907.5361hep-phhep-th
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Soft-Wall Stabilization

Joan A. Cabrer, Gero von Gersdorff, Mariano Quiros

摘要:

我们提出了一类具有AdS度规和四维Poincaré不变性的五维软壁模型,其中红外尺度是动态确定的。一个大的UV/IR层次可以产生没有任何微调,从而解决了电弱/普朗克尺度层次问题。一般来说,波动的频谱是离散的水平间距(质量间隙)提供的反长度的壁,类似于RS 1模型与标准模型领域中传播的散装。此外,还出现了两个特别有趣的案例。它们可以描述:(a)一个理论与一个连续谱以上的质量差距,可以模拟unparticles对应的运营商的CFT共形对称性被打破的质量差距,和;(b)一个理论与离散谱提供的线性Regge轨迹在AdS/QCD模型。

英文摘要:

We propose a general class of five-dimensional soft-wall models with AdS metric near the ultraviolet brane and four-dimensional Poincaré invariance, where the infrared scale is determined dynamically. A large UV/IR hierarchy can be generated without any fine-tuning, thus solving the electroweak/Planck scale hierarchy problem. Generically, the spectrum of fluctuations is discrete with a level spacing (mass gap) provided by the inverse length of the wall, similar to RS1 models with Standard Model fields propagating in the bulk. Moreover two particularly interesting cases arise. They can describe: (a) a theory with a continuous spectrum above the mass gap which can model unparticles corresponding to operators of a CFT where the conformal symmetry is broken by a mass gap, and; (b) a theory with a discrete spectrum provided by linear Regge trajectories as in AdS/QCD models.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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