Scalar fluctuations in dilatonic brane-worlds
High Energy Physics - Theory
2007-05-23 v1
Abstract
We derive and solve the full set of scalar perturbation equations for a class of five-dimensional brane--world solutions, with a dilaton scalar field coupled to the bulk cosmological constant and to a 3-brane. The spectrum contains one localized massless scalar mode, to be interpreted as an effective dilaton on the brane, inducing long--range scalar interactions. Two massive scalar modes yield corrections to Newton's law at short distances, which persist even in the limit of vanishing dilaton (namely, in the standard Randall--Sundrum configuration).
Cite
@article{arxiv.hep-th/0111268,
title = {Scalar fluctuations in dilatonic brane-worlds},
author = {V. Bozza and M. Gasperini and G. Veneziano},
journal= {arXiv preprint arXiv:hep-th/0111268},
year = {2007}
}
Comments
10 pages. Talk presented by V. Bozza at COSMO-01 conference, Rovaniemi, 2001