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arXiv 2301.02249hep-th
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三维N=4超共形场论的广义对称性与反常

Generalized Symmetries and Anomalies of 3d N=4 SCFTs

Lakshya Bhardwaj, Mathew Bullimore, Andrea E. V. Ferrari, Sakura Schafer-Nameki

AI总结:

本文研究三维N=4超共形场论的广义对称性及其't Hooft反常,提出从UV拉格朗日量通过磁单极算子中心荷确定库仑支对称群的方法,并用4d/5d理论及镜像对称性验证。

摘要:

我们研究了三维N=4超共形场论(SCFTs)中的广义全局对称性及其't Hooft反常。在一般性考虑之后,我们聚焦于由平衡的酉节点以及非平衡的酉节点和特殊酉节点构成的良好箭形规范理论。虽然希格斯支对称群的全局形式可以从紫外(UV)拉格朗日量确定,但库仑支对称群的全局形式及其相关的混合't Hooft反常则更为微妙,因为红外(IR)中可能存在对称性增强。我们描述了如何通过研究各类磁单极算子的中心荷,从UV拉格朗日量推导出库仑支对称群及其混合't Hooft反常,从而为实施't Hooft反常匹配提供了一种具体且无歧义的方法。对称群和't Hooft反常的最终表达式具有简洁的形式,可以轻松地从箭形数据中读出,特别是根据非平衡节点和味节点相对于平衡节点的位置。我们通过将方法应用于计算对应于4d Class S理论和5d SCFTs的磁箭形的三维N=4理论的对称群,提供了一致性检验。我们能够将这些结果与使用独立方法计算的4d和5d理论的味对称群进行匹配。另一个强有力的一致性检验是通过比较由三维镜像对称性关联的两个理论的对称群和反常来提供的。

英文摘要:

We study generalized global symmetries and their 't Hooft anomalies in 3d N=4 superconformal field theories (SCFTs). Following some general considerations, we focus on good quiver gauge theories, comprised of balanced unitary nodes and unbalanced unitary and special unitary nodes. While the global form of the Higgs branch symmetry group may be determined from the UV Lagrangian, the global form of Coulomb branch symmetry groups and associated mixed 't Hooft anomalies are more subtle due to potential symmetry enhancement in the IR. We describe how Coulomb branch symmetry groups and their mixed 't Hooft anomalies can be deduced from the UV Lagrangian by studying center charges of various types of monopole operators, providing a concrete and unambiguous way to implement 't Hooft anomaly matching. The final expression for the symmetry group and 't Hooft anomalies has a concise form that can be easily read off from the quiver data, specifically from the positions of the unbalanced and flavor nodes with respect to the positions of the balanced nodes. We provide consistency checks by applying our method to compute symmetry groups of 3d N=4 theories corresponding to magnetic quivers of 4d Class S theories and 5d SCFTs. We are able to match these results against the flavor symmetry groups of the 4d and 5d theories computed using independent methods. Another strong consistency check is provided by comparing symmetry groups and anomalies of two theories related by 3d mirror symmetry.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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