Gravity on a Little Warped Space

Details Gravity on a Little Warped Space Gravity on a Little Warped Space

2011-07-04

arxiv.org/abs/1107.0755v1

Phys.Rev.D84:064007,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

1+24 pages

Scientific paper

10.1103/PhysRevD.84.064007

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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