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arXiv 1107.0755hep-phgr-qchep-th
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小扭曲空间上的引力

Gravity on a Little Warped Space

Damien P. George, Kristian L. McDonald

备注：
1+24 pages
发表信息：
Phys.Rev.D84:064007,2011
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摘要：

本文研究了体引力和紫外尺度都远小于四维普朗克尺度M * M_{Pl}的AdS_5截断切片上四维Einstein引力的一致包含.这样的“小扭曲空间”已经发现了现象学上的效用，并且可以被兰德尔-桑德拉姆框架的弦实现所激励。使用膜世界引力的区间方法，我们表明，包含一个大的UV局域化的爱因斯坦-希尔伯特项允许一个一致地将4D爱因斯坦引力纳入低能理论。我们详细的卡鲁扎-克莱因度规波动的频谱，特别是，检查耦合的小radion的问题。此外，我们表明，Goldberger-Wise稳定化可以成功地实现这样的空间。我们的研究结果表明，现实的低能量有效的理论可以构建在这些空间，并在文献中现有的模型具有相关性。

英文摘要：

We investigate the consistent inclusion of 4D Einstein gravity on a truncated slice of AdS_5 whose bulk-gravity and UV scales are much less than the 4D Planck scale, M_* << M_{Pl}. Such "Little Warped Spaces" have found phenomenological utility and can be motivated by string realizations of the Randall-Sundrum framework. Using the interval approach to brane-world gravity, we show that the inclusion of a large UV-localized Einstein-Hilbert term allows one to consistently incorporate 4D Einstein gravity into the low-energy theory. We detail the spectrum of Kaluza-Klein metric fluctuations and, in particular, examine the coupling of the little radion to matter. Furthermore, we show that Goldberger-Wise stabilization can be successfully implemented on such spaces. Our results demonstrate that realistic low-energy effective theories can be constructed on these spaces, and have relevance for existing models in the literature.

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