Ghosts in asymmetric brane gravity and the decoupled stealth limit

This data was imported from Scopus:

Authors: Koyama, K., Padilla, A. and Silva, F.P.

Journal: Journal of High Energy Physics

Volume: 2009

Issue: 3

eISSN: 1029-8479

ISSN: 1126-6708

DOI: 10.1088/1126-6708/2009/03/134

We study the spectrum of gravitational perturbations around a vacuum de Sitter brane in a 5D asymmetric braneworld model, with induced curvature on the brane. This generalises the stealth acceleration model proposed by Charmousis, Gregory and Padilla (CGP) which realises the Cardassian cosmology in which power law cosmic acceleration can be driven by ordinary matter. Whenever the bulk has infinite volume we find that there is always a perturbative ghost propagating on the de Sitter brane, in contrast to the Minkowski brane case analysed by CGP. We discuss the implication of this ghost for the stealth acceleration model, and identify a limiting case where the ghost decouples as the de Sitter curvature vanishes. © SISSA 2009.

This data was imported from Web of Science (Lite):

Authors: Koyama, K., Padilla, A. and Silva, F.P.

Journal: JOURNAL OF HIGH ENERGY PHYSICS

Issue: 3

ISSN: 1029-8479

DOI: 10.1088/1126-6708/2009/03/134

The data on this page was last updated at 04:57 on May 21, 2019.