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arXiv 1408.6871hep-thastro-ph.COhep-ph
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矢量伽利略子的Higgs机制

A Higgs Mechanism for Vector Galileons

Matthew Hull, Kazuya Koyama, Gianmassimo Tasinato

摘要:

具有非线性导数自相互作用的矢量理论打破了规范对称性,在宇宙学中有着有趣的应用。本文介绍了一种自发破缺规范对称性的方法,并通过希格斯机制建立了这些理论。除了纯粹的规范场相互作用,我们的方法产生新的幽灵免费希格斯场和规范玻色子之间的标量矢量相互作用。我们展示了如何发现这些额外的条款减少,在一个合适的去耦限制,标量双伽利略希格斯场和戈德斯通玻色子之间的相互作用。我们的形式主义首先是在阿贝尔对称的背景下发展起来的,这使我们能够与早期的工作联系起来,扩展了Proca行动。然后,我们将展示如何将这种形式主义直接推广到生成具有非阿贝尔对称性的理论。

英文摘要:

Vector theories with non-linear derivative self-interactions that break gauge symmetries have been shown to have interesting cosmological applications. In this paper we introduce a way to spontaneously break the gauge symmetry and construct these theories via a Higgs mechanism. In addition to the purely gauge field interactions, our method generates new ghost-free scalar-vector interactions between the Higgs field and the gauge boson. We show how these additional terms are found to reduce, in a suitable decoupling limit, to scalar bi-Galileon interactions between the Higgs field and Goldstone bosons. Our formalism is first developed in the context of abelian symmetry, which allows us to connect with earlier work on the extension of the Proca action. We then show how this formalism is straightforwardly generalised to generate theories with non-abelian symmetry.

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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