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(Reverse) Engineering Vacuum Alignment

机译:(反向)工程真空对准

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摘要

In the presence of spontaneous symmetry breaking, the alignment of the vacuumwith respect to the gauge group is often controlled by quadratically divergentoperators in the low energy non-linear sigma model. In principle the magnitudesand signs of these operators can be changed by making different assumptionsabout the ultraviolet physics, but in practice all known ways of regulatingthese theories preserve the naive vacuum alignment. We show that by"integrating in" different sets of heavy spin-one fields, it is possible to UVextend certain non-linear sigma models into two distinct UV insensitivetheories. These UV extensions have identical low energy degrees of freedom butdifferent radiative potentials, making it possible to engineer two differentvacuum alignments for the original non-linear sigma model. Our constructionemploys "non-square" theory spaces which generically violate the common lorethat the preferred vacuum alignment preserves the maximal gauge symmetry. By UVextending the SO(9)/(SO(4) X SO(5)) little Higgs model, we find a radiativepotential that deviates from the naive expectation but does not stabilize thecorrect vacuum for proper electroweak symmetry breaking.
机译:在自发对称破坏的情况下,真空相对于量规组的对准通常由低能非线性sigma模型中的二次发散算子控制。原则上,可以通过对紫外线物理学做出不同的假设来更改这些算符的大小和符号,但是实际上,所有调节这些理论的已知方法都可以保留原始的真空排列。我们表明,通过“整合”不同组的重旋子场,可以将某些非线性sigma模型UV扩展为两个不同的UV不敏感理论。这些UV扩展具有相同的低能量自由度,但辐射电位不同,从而可以为原始的非线性sigma模型设计两个不同的真空排列。我们的构造采用了“非正方形”理论空间,该理论空间通常违反了常见的知识,即首选的真空对准可保持最大量规对称性。通过UV扩展SO(9)/(SO(4)X SO(5))小希格斯模型,我们发现了一个背离天真期望的辐射电势,但它并不能稳定正确的电弱对称性破折的正确真空。

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  • 年度 2006
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  • 原文格式 PDF
  • 正文语种 {"code":"en","name":"English","id":9}
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