Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2001-12-24
Int.J.Mod.Phys. A18 (2003) 2703-2727
Physics
High Energy Physics
High Energy Physics - Theory
23 pages, typos in Secs. 5 & 6 corrected, expanded/published version (IJMPA)
Scientific paper
10.1142/S0217751X03015106
In the Randall-Sundrum (RS) brane-world model a singular delta-function source is matched by the second derivative of the warp factor. So one should take possible curvature corrections in the effective action of the RS models in a Gauss-Bonnet (GB) form. We present a linearized treatment of gravity in the RS brane-world with the Gauss-Bonnet modification to Einstein gravity. We give explicit expressions for the Neumann propagator in arbitrary D dimensions and show that a bulk GB term gives, along with a tower of Kaluza-Klein modes in the bulk, a massless graviton on the brane, as in the standard RS model. Moreover, a non-trivial GB coupling can allow a new branch of solutions with finite Planck scale and no naked bulk singularity, which might be useful to avoid some of the previously known ``no--go theorems'' for RS brane-world compactifications.
Cho Young-Min
Neupane Ishwaree P.
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