Hiding a cosmological constant in a warped extra dimension

Details Hiding a cosmological constant in a warped extra dimension Hiding a cosmological constant in a warped extra dimension

Nov 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..601...82c&link_type=abstract

THEORETICAL HIGH ENERGY PHYSICS: MRST 2001: A Tribute to Roger Migneron. AIP Conference Proceedings, Volume 601, pp. 82-87 (200

Physics

High Energy Physics

Gravity In More Than Four Dimensions, Kaluza-Klein Theory, Unified Field Theories, Alternative Theories Of Gravity

Scientific paper

We present a scenario in which extra dimensions are used to address the cosmological constant problem. For a theory of gravity in 4+1 dimensions whose dynamics are governed by an effective action that includes quadratic terms in the curvature and a compact scalar field, the field equations admit solutions that are compact in one direction and Poincaré invariant in the remaining directions. These solutions do not require any fine-tuning of the parameters in the action-including the cosmological constant-only that they should satisfy some mild inequalities. We further discuss several features of this picture, including an example of a metric that localizes gravity to a hypersurface without including a brane as well as how to combine this approach with the Randall-Sundrum model. .

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