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arXiv 0905.2768hep-th
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如何消除SU的Cho-Fadeev-Niemi表示中的Dirac世界片(2)Yang-Mills理论

How to get rid of Dirac worldsheets in the Cho-Fadeev-Niemi representation of SU(2) Yang-Mills theory

A. L. L. de Lemos, M. Moriconi, L. E. Oxman

摘要:

本文给出了一个精确的方法来处理含有单极子系综与带电场相互作用的规范理论中的狄拉克弦或世界片。对于SU(2)Yang-Mills理论,我们首先构造了带电场(包括带电鬼场和辅助场)变量的适当变化,使得极大阿贝尔规范中配分函数的被积函数的唯一变化是给定闭Dirac世界片的相加。接下来,我们得到我们的主要结果,即,我们表明,它总是可以选择他们在这样一种方式,总(开放加封闭)狄拉克世界表明确地从带电部门解耦,只留下其相关的规范不变边界(单极放置)的影响,而不会丢失任何信息的中心涡旋部门。这个过程作为一个简化的基础,以处理的框架内的Cho-Faddeev-Niemi规范场分解的单极子和中心涡系综,通过编写的配分函数,仅在物理部分的缺陷被整合。

英文摘要:

In this paper, we present an exact procedure to deal with Dirac strings or worldsheets in gauge theories containing ensembles of monopoles interacting with charged fields. For SU(2) Yang-Mills theory, initially we construct the appropriate change of variables of the charged fields (including charged ghosts and auxiliary fields) so that the only change in the integrand of the partition function, in the Maximal Abelian gauge, is the addition of given closed Dirac worldsheets. Next, we derive our main result, namely, we show that it is always possible to choose them in such a manner that the total (open plus closed) Dirac worldsheets explicitly decouple from the charged sector, leaving only the effect of their associated gauge invariant borders (where the monopoles are placed), without missing any information about the center vortex sector. This procedure serves as a simplifying basis to deal with ensembles of monopoles and center vortices in the framework of the Cho-Faddeev-Niemi gauge field decomposition, by writing the partition function only in terms of the physical part of the defects to be integrated.

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