RESTRICTIONS ON DILATONIC BRANE-WORLD MODELS

Abstract

We consider dilatonic brane-world models with a non-minimal coupling between dilaton and usual matter on the brane. We demonstrate that the variation of fundamental constants on the brane due to such interaction can lead to strong restrictions on model parameters. In particular, the experimental bounds on the variation of the fine structure constant rule out non-minimal dilatonic models with a Liouville-type coupling potential f(φ) = exp (bφ) where [Formula: see text].