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arXiv 1803.07585hep-thhep-ph
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齐型空间上西格玛模型中拓扑项的同调分类

Homological classification of topological terms in sigma models on homogeneous spaces

Joe Davighi, Ben Gripaios

摘要:

我们对可能出现在基于从任意世界体积流形到齐次空间$G/H$(其中$G$是任意李群和$H \subset G$)的映射的非线性西格玛模型中的拓扑项(在某种意义上是精确的)进行分类。我们导出了拓扑项的$G$ -不变性的一个新条件,这个条件是必要的和充分的(至少当$G$是连通的),并讨论了量子力学和量子场论中的各种例子.在目前的工作中,我们讨论的条款,可以写在$G/H$的微分形式(可能只有本地定义),导致一个行动,显然是本地的。这些项有两种类型,典型的量子力学例子是阿哈罗诺夫-玻姆效应和狄拉克粒子。该分类是基于这样的观察,即对于拓扑项,从世界体积到$G/H$的映射可以被$G/H$上的奇异同调环所取代。在即将发表的论文中,我们将结果应用于希格斯玻色子是复合物的唯象模型。

英文摘要:

We classify the topological terms (in a sense to be made precise) that may appear in a non-linear sigma model based on maps from an arbitrary worldvolume manifold to a homogeneous space $G/H$ (where $G$ is an arbitrary Lie group and $H \subset G$). We derive a new condition for $G$-invariance of topological terms, which is necessary and sufficient (at least when $G$ is connected), and discuss a variety of examples in quantum mechanics and quantum field theory. In the present work we discuss only terms that may be written in terms of (possibly only locally-defined) differential forms on $G/H$, leading to an action that is manifestly local. Such terms come in one of two types, with prototypical quantum-mechanical examples given by the Aharonov-Bohm effect and the Dirac monopole. The classification is based on the observation that, for topological terms, the maps from the worldvolume to $G/H$ may be replaced by singular homology cycles on $G/H$. In a forthcoming paper we apply the results to phenomenological models in which the Higgs boson is composite.

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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