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arXiv 1003.2989hep-thhep-ph
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极大超对称规范理论的模空间上不存在三角形

No triangles on the moduli space of maximally supersymmetric gauge theory

Rutger H. Boels

摘要:

四维极大超对称规范理论在树和圈的模空间的原点都有一个非常简单的S-矩阵。这就引出了一个问题,如果有的话,这个结构在这一点的补充中幸存下来。在这里,这个问题进行了详细研究,在一个循环的分支的模空间参数化的真空期望值为一个复杂的标量。受自发对称性破缺的平行D膜图象的启发,证明了破缺超杨-米尔斯理论的拉格朗日量与其高维未破缺的同类理论的拉格朗日量之间的一个简单关系.利用这个关系,它是证明通过一个上以及一个离壳方法有没有所谓的三角系数在自然基础上的一个循环功能在任何有限点的模空间的理论研究。此外,离壳方法还导致库仑分支上的一类理论中缺乏有理项,其中包括最大超对称性的特殊情况。本文中的结果提供了直接的场论证据最近提出的一个确切的双重共形对称性的动机AdS/CFT对应。

英文摘要:

Maximally supersymmetric gauge theory in four dimensions has a remarkably simple S-matrix at the origin of its moduli space at both tree and loop level. This leads to the question what, if any, of this structure survives at the complement of this one point. Here this question is studied in detail at one loop for the branch of the moduli space parameterized by a vacuum expectation value for one complex scalar. Motivated by the parallel D-brane picture of spontaneous symmetry breaking a simple relation is demonstrated between the Lagrangian of broken super Yang-Mills theory and that of its higher dimensional unbroken cousin. Using this relation it is proven both through an on- as well as an off-shell method there are no so-called triangle coefficients in the natural basis of one-loop functions at any finite point of the moduli space for the theory under study. The off-shell method yields in addition absence of rational terms in a class of theories on the Coulomb branch which includes the special case of maximal supersymmetry. The results in this article provide direct field theory evidence for a recently proposed exact dual conformal symmetry motivated by the AdS/CFT correspondence.

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