Gravity on a 3-brane in 6-D bulk
Aug, 2001
16 pages
Published in:
- Phys.Lett.B 521 (2001) 96-104
e-Print:
- hep-th/0108055 [hep-th]
Report number:
- YITP-SB-01-40,
- NYU-TH-01-07-10
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Abstract:
We study gravity in codimension-2 brane world scenarios with infinite volume extra dimensions. In particular, we consider the case where the brane has non-zero tension. The extra space then is a two-dimensional ``wedge'' with a deficit angle. In such backgrounds we can effectively have the Einstein-Hilbert term on the brane at the classical level if we include higher curvature (Gauss-Bonnet) terms in the bulk. Alternatively, such a term would be generated at the quantum level if the brane matter is not conformal. We study (linearized) gravity in the presence of the Einstein-Hilbert term on the brane in such backgrounds. We find that, just as in the original codimension-2 Dvali-Gabadadze model with a tensionless brane, gravity is almost completely localized on the brane with ultra-light modes penetrating into the bulk.Note:
- 16 pages, revtex; references added (to appear in Phys. Lett. B) Report-no: YITP-SB-01-40, NYU-TH/01/07/10
- membrane model
- gravitation
- dimension: 6
- field equations: linear
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