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arXiv 0801.1274hep-thhep-ph
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威尔逊圈与非阿贝尔Stokes定理下的磁共振

Wilson loop and magnetic monopole through a non-Abelian Stokes theorem

Kei-Ichi Kondo

摘要:

通过Diakonov-Petrov型的非阿贝尔Stokes定理,我们证明了SU(N)Yang-Mills规范连接的威尔逊圈算符可以用规范不变的守恒磁场和电流来精确地重写.在这里,磁流起源于从纯杨-米尔斯理论中以规范不变的方式导出的磁流,即使在没有希格斯标量场的情况下,这与Georgi-Hoohow规范-希格斯模型中的t Hooft-Polyakov磁流形成鲜明对比。结果表明,与传统观点相反,基本表象中的威尔逊圈算符可以作为SU(N)Yang-Mills理论中单个磁磁链的探针,而与$N$无关.此外,我们还证明了磁荷的量子化条件来自于非阿贝尔斯托克斯定理不依赖于为写表面积分而选择的表面这一事实。所得到的威尔逊圈算符的几何和拓扑表示对于根据对偶超导体图像理解夸克禁闭具有重要意义。

英文摘要:

We show that the Wilson loop operator for SU(N) Yang-Mills gauge connection is exactly rewritten in terms of conserved gauge-invariant magnetic and electric currents through a non-Abelian Stokes theorem of the Diakonov-Petrov type. Here the magnetic current originates from the magnetic monopole derived in the gauge-invariant way from the pure Yang--Mills theory even in the absence of the Higgs scalar field, in sharp contrast to the 't Hooft-Polyakov magnetic monopole in the Georgi-Glashow gauge-Higgs model. The resulting representation indicates that the Wilson loop operator in fundamental representations can be a probe for a single magnetic monopole irrespective of $N$ in SU(N) Yang-Mills theory, against the conventional wisdom. Moreover, we show that the quantization condition for the magnetic charge follows from the fact that the non-Abelian Stokes theorem does not depend on the surface chosen for writing the surface integral. The obtained geometrical and topological representations of the Wilson loop operator have important implications to understanding quark confinement according to the dual superconductor picture.

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