Localization of gauge field by non-minimal coupling with gravity
arXiv:2212.00444 · doi:10.1088/1475-7516/2023/07/010
Abstract
In this paper, we investigate the localization of the gauge field on Randall-Sundrum-like braneworld models. The localization of the gauge field is important because it plays a fundamental role in the branworld theories. To achieve the localization, we propose a novel action with a non-minimal coupling between the gauge field and gravity. We find that the mass spectrum of the gauge field is continuous, without any gap between the zero-mass mode and the massive modes, and except for the zero-mass mode all the massive modes are not localized on the brane. Furthermore, the massive modes have negative squared masses, indicating they are tachyonic. Our analysis can be applied to a wide range of thin and thick braneworld scenarios, provided that the five-dimensional spacetime is asymptotically anti-de Sitter.
arXiv comment10 pages, 2 figures, Accepted by JCAP
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