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arXiv 1509.04728hep-th
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连续介质Yang-Mills理论中拓扑扇区的检测和BRST对称性的命运

Detecting topological sectors in continuum Yang-Mills theory and the fate of BRST symmetry

L. E. Oxman, G. C. Santos-Rosa

摘要:

在这项工作中,在晶格中的拉普拉斯型中心规范的动机,旨在避免Gribov问题,我们介绍了一个新的家庭的规范固定纯杨米尔斯理论在连续。该过程将配分函数分成与不同扇区相关的部分贡献,包含中心涡和相关单极。我们发现,在每个部门,规范固定路径积分显示BRST对称性,但是,它不能在全球范围内扩展,由于部门依赖的边界条件的鬼场。这些都是很好的特性,因为它们将允许讨论部分贡献对规范参数的独立性,同时为量子态空间打开一个窗口,使其不同于微扰空间,如果去除拓扑构型,这将是隐含的。

英文摘要:

In this work, motivated by Laplacian type center gauges in the lattice, designed to avoid the Gribov problem, we introduce a new family of gauge fixings for pure Yang-Mills theories in the continuum. This procedure separates the partition function into partial contributions associated with different sectors, containing center vortices and correlated monopoles. We show that, on each sector, the gauge fixed path-integral displays a BRST symmetry, however, it cannot be globally extended due to sector dependent boundary conditions on the ghost fields. These are nice features as they would permit to discuss the independence of the partial contributions on gauge parameters,, while opening a window for the space of quantum states to be different from the perturbative one, which would be implied if topological configurations were removed.

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