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arXiv 1905.06968hep-th
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Maxwell-Proca理论:定义与构建

The Maxwell-Proca theory: definition and construction

Verónica Errasti Díez, Brage Gording, Julio A. Méndez-Zavaleta, Angnis Schmidt-May

摘要:

我们提出了一个系统的建设最一般的一阶拉格朗日描述任意数量的相互作用麦克斯韦和Proca场的闵可夫斯基时空。为了这个目的,我们首先形式化的Proca场的概念,在类比众所周知的麦克斯韦场。我们的定义允许Proca质量的非线性实现,以衍生自相互作用的形式。因此,我们考虑所谓的广义Proca/矢量Galileons。我们明确证明了这个完整的麦克斯韦-普罗卡理论的鬼自由,通过获得其约束代数。我们发现,当多个Proca字段存在时,它们的相互作用必须满足非平凡的微分关系,以确保正确数量的自由度的传播。到目前为止,这些关系一直被忽视,这意味着以前的多Proca提案通常包含幽灵。这是arXiv:1905.06968 [hep-th]的姊妹篇。它为那里介绍的理论奠定了坚实的基础。

英文摘要:

We present a systematic construction of the most general first order Lagrangian describing an arbitrary number of interacting Maxwell and Proca fields on Minkowski spacetime. To this aim, we first formalize the notion of a Proca field, in analogy to the well known Maxwell field. Our definition allows for a non-linear realization of the Proca mass, in the form of derivative self-interactions. Consequently, we consider so-called generalized Proca/vector Galileons. We explicitly demonstrate the ghost-freedom of this complete Maxwell-Proca theory by obtaining its constraint algebra. We find that, when multiple Proca fields are present, their interactions must fulfill non-trivial differential relations in order to ensure the propagation of the correct number of degrees of freedom. These relations had so far been overlooked, which means previous multi-Proca proposals generically contain ghosts. This is a companion paper to arXiv:1905.06968 [hep-th]. It puts on a solid footing the theory there introduced.

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