More on ghosts in DGP model

Preprint

8 December 2005

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-th/0512097

Abstract

It is shown by an explicit calculation that the excitations about the self-accelerating cosmological solution of the Dvali--Gabadaze--Porrati model contain a ghost mode. This raises serious doubts about viability of this solution. Our analysis reveals the similarity between the quadratic theory for the perturbations around the self-accelerating Universe and an Abelian gauge model with two Stueckelberg fields.

Keywords

THEORY FOR THE PERTURBATIONS
EXPLICIT CALCULATION
TWO STUECKELBERG
QUADRATIC THEORY
GHOSTS IN DGP
ACCELERATING
GHOST MODE
DGP MODEL

All Related Versions

Version 1, 2005-12-08, ArXiv
Published version: Physical Review D, 73 (4), 044016.

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