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arXiv 1602.03410hep-thastro-ph.COgr-qc
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有质量向量场的导数自相互作用

Derivative self-interactions for a massive vector field

Jose Beltrán Jiménez, Lavinia Heisenberg

摘要:

在这项工作中,我们重新构建的理论与衍生自相互作用的大规模矢量场,只有3个所需的极化对应的Proca场传播。我们从解耦极限开始,通过构建健康的相互作用,包含二阶导数的Stueckelberg场与自身,也与横模。由此产生的相互作用,然后可以直接概括超出解耦限制。然后,我们进行系统的建设的相互作用,使用列维-奇维塔张量。这两种方法导致有限的家庭允许衍生自相互作用的Proca字段。这种结构使我们能够表明,最近引入的一些高阶项作为新的相互作用trivialize在4维凭借凯莱-汉密尔顿定理。此外,我们讨论了如何产生的衍生相互作用可以写在一个紧凑的行列式形式,这也可以被视为一个推广的Born-Infeld拉格朗日电磁。最后,我们推广我们的结果为弯曲的背景,并给出必要的非最小耦合,保证没有额外的极化传播,即使在重力的存在。

英文摘要:

In this work we revisit the construction of theories for a massive vector field with derivative self-interactions such that only the 3 desired polarizations corresponding to a Proca field propagate. We start from the decoupling limit by constructing healthy interactions containing second derivatives of the Stueckelberg field with itself and also with the transverse modes. The resulting interactions can then be straightforwardly generalized beyond the decoupling limit. We then proceed to a systematic construction of the interactions by using the Levi-Civita tensors. Both approaches lead to a finite family of allowed derivative self-interactions for the Proca field. This construction allows us to show that some higher order terms recently introduced as new interactions trivialize in 4 dimensions by virtue of the Cayley-Hamilton theorem. Moreover, we discuss how the resulting derivative interactions can be written in a compact determinantal form, which can also be regarded as a generalization of the Born-Infeld lagrangian for electromagnetism. Finally, we generalize our results for a curved background and give the necessary non-minimal couplings guaranteeing that no additional polarizations propagate even in the presence of gravity.

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