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arXiv 0809.5180hep-th
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没有Action的超重力:测量长号

Supergravities without an Action: Gauging the Trombone

Arnaud Le Diffon, Henning Samtleben

摘要:

我们提出了一个系统的超引力理论,其中的全球标度对称性进行了测量。这推广了非阿贝尔离壳对称性的标准规范。这些理论的一个特别之处是对有效宇宙学常数有额外的正贡献。由于标度对称是壳层上对称,因此所得规范不再具有作用量。我们开发的代数框架的最大理论在不同的维度和构造明确的解决方案的代数一致性约束-有关的“纯旋量”结构的例外群体。作为一个例子,我们显式地给出了修正的超对称变换规则和三维运动方程。最后,我们从非常扩展的卡茨-穆迪代数的角度来推测这些理论的作用。

英文摘要:

We present a systematic account of supergravity theories in which the global scaling symmetry is gauged. This generalizes the standard gaugings of non-abelian off-shell symmetries. A particular feature of these theories is an additional positive contribution to the effective cosmological constant. As the scaling symmetry is an on-shell symmetry, the resulting gaugings do no longer possess an action. We develop the algebraic framework for the maximal theories in various dimensions and construct explicit solutions to the algebraic consistency constraints - related to `pure-spinor-like' structures for the exceptional groups. As an example, we explicitly work out the modified supersymmetry transformation rules and equations of motion in three dimensions. Finally, we speculate about the role of these theories from the perspective of very extended Kac-Moody algebras.

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