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Article overview
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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 | Abstract: | We 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 | Services: | Forum | Review | PDF | Favorites |
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