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arXiv 1112.1817hep-th
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(非微扰)Yang-Mills理论中Slavnov-Taylor恒等式对背景场的依赖性

Background field dependence from the Slavnov-Taylor identity in (non-perturbative) Yang-Mills theory

Andrea Quadri

摘要:

我们表明,在杨-米尔斯理论的斯拉夫诺夫-泰勒(ST)身份,扩展在存在的背景规范连接,允许以一种独特的方式固定的依赖的顶点功能的背景上,一旦1-PI振幅在零背景是已知的。重建的背景依赖性是由纯粹的代数技术,因此可以应用在一个非微扰计划(例如,在晶格或Schwinger-Dyson方法),只要后者保留ST身份。以SU(2)Yang-Mills理论中的瞬子背景为例,考虑了场-反场的重新定义,在考虑量子修正的情况下,这种重新定义取代了经典的背景-量子分裂.

英文摘要:

We show that in Yang-Mills theory the Slavnov-Taylor (ST) identity, extended in the presence of a background gauge connection, allows to fix in a unique way the dependence of the vertex functional on the background, once the 1-PI amplitudes at zero background are known. The reconstruction of the background dependence is carried out by purely algebraic techniques and therefore can be applied in a non-perturbative scheme (e.g. on the lattice or in the Schwinger-Dyson approach), provided that the latter preserves the ST identity. The field-antifield redefinition, which replaces the classical background-quantum splitting when quantum corrections are taken into account, is considered on the example of an instanton background in SU(2) Yang-Mills theory.

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