Constrained Perturbative Expansion of the DGP Model
High Energy Physics - Theory
2009-11-11 v2
Abstract
We address the vDVZ discontinuity of the 5D DGP model which consists of a 3-brane residing in a flat, infinite-volume bulk. Following a suggestion by Gabadadze [hep-th/0403161], we implement a constrained perturbative expansion parametrized by brane gauge parameters. We explore the parameter space and show that the DGP solution exhibiting the vDVZ discontinuity corresponds to a set of measure zero.
Keywords
Cite
@article{arxiv.hep-th/0502020,
title = {Constrained Perturbative Expansion of the DGP Model},
author = {Chad Middleton and George Siopsis},
journal= {arXiv preprint arXiv:hep-th/0502020},
year = {2009}
}
Comments
12 pages incl. 1 figure. v2: expanded discussion on poles of propagator; to appear in Phys. Lett. B