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arXiv 0705.2410hep-thhep-ph
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一类新的破秩轨道

A New Class of Rank Breaking Orbifolds

Gero von Gersdorff

摘要:

我们描述了场论T^2/Z_n轨道,它提供了SU(N)破缺到低秩子群的新途径。我们介绍了一种新的方法嵌入点群的规范组,超出了通常的映射环面和根格。为了使这种机制起作用,环面威尔逊线必须携带非平凡的特胡夫特通量。降秩机制由内部自同构进行,但与连续威尔逊线无关,也不会产生任何相关的模量。我们给出了所有可能的SU(N)破缺模式的一个完整分类。我们还表明,一般规范群的情况下,已经可以完全理解的SU(N)的情况下和标准orbifold结构的知识与消失的't Hooft通量。

英文摘要:

We describe field-theory T^2/Z_n orbifolds that offer new ways of breaking SU(N) to lower rank subgroups. We introduce a novel way of embedding the point group into the gauge group, beyond the usual mapping of torus and root lattices. For this mechanism to work the torus Wilson lines must carry nontrivial 't Hooft flux. The rank lowering mechanism proceeds by inner automorphisms but is not related to continous Wilson lines and does not give rise to any associated moduli. We give a complete classification of all possible SU(N) breaking patterns. We also show that the case of general gauge group can already be understood entirely in terms of the SU(N) case and the knowledge of standard orbifold constructions with vanishing 't Hooft flux.

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