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arXiv 0705.2606hep-th
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测量二维中隐藏的对称性

Gauging hidden symmetries in two dimensions

Henning Samtleben, Martin Weidner

摘要:

我们开始了规范的二维物质耦合超引力理论的系统建设。超引力环紧化的仿射整体对称群的子群可以通过具有最小耦合的耦合向量场和特定的拓扑项来度量。规范群通常包括不属于无规范理论的目标空间等距的隐藏对称性。可能的计量描述组理论方面的一个恒定的嵌入张量受到一些约束,参数化不同的理论和完全编码的计量拉格朗日。最好的例子是最大超对称理论的玻色子扇区,它的非规范版本允许仿射E_9整体对称代数。各种参数(涉及高维p型通量、几何和非几何通量等)它们表征了可能的规范,组合成E_9的基本表示中的嵌入张量变换。这产生了一个无限维类的最大超对称理论在二维。我们给出并讨论了几个可以用E_9的不同分级系统分析的高维起源的例子。

英文摘要:

We initiate the systematic construction of gauged matter-coupled supergravity theories in two dimensions. Subgroups of the affine global symmetry group of toroidally compactified supergravity can be gauged by coupling vector fields with minimal couplings and a particular topological term. The gauge groups typically include hidden symmetries that are not among the target-space isometries of the ungauged theory. The possible gaugings are described group-theoretically in terms of a constant embedding tensor subject to a number of constraints which parametrizes the different theories and entirely encodes the gauged Lagrangian. The prime example is the bosonic sector of the maximally supersymmetric theory whose ungauged version admits an affine E_9 global symmetry algebra. The various parameters (related to higher-dimensional p-form fluxes, geometric and non-geometric fluxes, etc.) which characterize the possible gaugings, combine into an embedding tensor transforming in the basic representation of E_9. This yields an infinite-dimensional class of maximally supersymmetric theories in two dimensions. We work out and discuss several examples of higher-dimensional origin which can be systematically analyzed using the different gradings of E_9.

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