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arXiv 0803.3376hep-th
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磁荷格、模空间与熔合规则

Magnetic Charge Lattices, Moduli Spaces and Fusion Rules

L. Kampmeijer, J. K. Slingerland, B. J. Schroers, F. A. Bais

摘要:

本文分析了任意规范群G自发破缺为子群H的Yang-Mills-Higgs理论中光滑BPS单极子所携带的磁荷集。收费限制的广义狄拉克量子化条件和一个不等式,由于默里。在几何上,允许电荷的集合是G的coroot晶格中的一个实心锥,我们称之为默里锥。我们认为,磁荷部门对应的点在默里锥除以Weyl组的H,因此磁荷部门标记的占主导地位的积分权重的对偶组H*。我们定义发电机的默里锥模Weyl组,并解释在相关的磁荷部门的单极子作为基本的,单极子与可分解的费用部门被解释为复合配置。这种解释是由与磁荷相关的模空间的维数和在特定情况下光滑单极子的经典融合性质所支持的。在整个文件中,我们比较了我们的研究结果与相应的结果最近得到的奇异单极Kapustin和Witten。

英文摘要:

We analyze the set of magnetic charges carried by smooth BPS monopoles in Yang-Mills-Higgs theory with arbitrary gauge group G spontaneously broken to a subgroup H. The charges are restricted by a generalized Dirac quantization condition and by an inequality due to Murray. Geometrically, the set of allowed charges is a solid cone in the coroot lattice of G, which we call the Murray cone. We argue that magnetic charge sectors correspond to points in the Murray cone divided by the Weyl group of H; hence magnetic charge sectors are labelled by dominant integral weights of the dual group H*. We define generators of the Murray cone modulo Weyl group, and interpret the monopoles in the associated magnetic charge sectors as basic; monopoles in sectors with decomposable charges are interpreted as composite configurations. This interpretation is supported by the dimensionality of the moduli spaces associated to the magnetic charges and by classical fusion properties for smooth monopoles in particular cases. Throughout the paper we compare our findings with corresponding results for singular monopoles recently obtained by Kapustin and Witten.

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