A short review of "DGP Specteroscopy"
arXiv:hep-th/0610093 · doi:10.1088/1751-8113/40/25/S26
Abstract
In this paper we provide a short review of the main results developed in hep-th/0604086. We focus on linearised vacuum perturbations about the self-accelerating branch of solutions in the DGP model. These are shown to contain a ghost in the spectrum for any value of the brane tension. We also comment on hep-th/0607099, where some counter arguments have been presented.
Minor typos corrected