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29 March 2024
 
  » arxiv » hep-th/0105261

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Exponentially Large Extra Dimensions
A. Albrecht ; C.P. Burgess ; F. Ravndal ; C. Skordis ;
Date 28 May 2001
Journal Phys.Rev. D65 (2002) 123506
Subject hep-th astro-ph hep-ph
AbstractWe show how the presence of a very light scalar with a cubic self-interaction in six dimensions can stabilize the extra dimensions at radii which are naturally exponentially large, $r sim ell exp [(4pi)^3/g^2]$, where $ell$ is a microscopic physics scale and $g$ is the (dimensionless) cubic coupling constant. The resulting radion mode of the metric becomes a very light degree of freedom whose mass, $m sim 1/(M_p r^2)$ is stable under radiative corrections. For $1/r sim 10^{-3}$ eV the radion is extremely light, $m sim 10^{-33}$ eV. Its couplings cause important deviations from General Relativity in the very early universe, but naturally evolve to phenomenologically acceptable values at present.
Source arXiv, hep-th/0105261
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