Exponentially Large Extra Dimensions

A. Albrecht; C. P. Burgess; F. Ravndal; C. Skordis

doi:10.1103/PhysRevD.65.123506

paper

Exponentially Large Extra Dimensions

arXiv:hep-th/0105261 · doi:10.1103/PhysRevD.65.123506

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, $r \sim ℓ exp [(4 π)^{3} / g^{2}]$ , where $ℓ$ 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 $1/ r \sim 1 0^{- 3}$ eV the radion is extremely light, $m \sim 1 0^{- 33}$ eV. Its couplings cause important deviations from General Relativity in the very early universe, but naturally evolve to phenomenologically acceptable values at present.

15 Pages including 1 figure. V3: Final version accepted for publication in PRD. This version has an improved discussion (in section IV-B) of our mechanism for preserving the small radion mass. No changes have been made to the technical content or results

Exponentially Large Extra Dimensions

Abstract

References in corpus (2)

Cited by in corpus (32)