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Durham University

Department of Mathematical Sciences

Academic Staff

Publication details for Ruth Gregory

Charmousis, C., Gregory, R., Kaloper, N. & Padilla, A. (2006). DGP specteroscopy. Journal of High Energy Physics 2006(10): 066.

Author(s) from Durham


We systematically explore the spectrum of gravitational perturbations in codimension-1 DGP braneworlds, and find a 4D ghost on the self-accelerating branch of solutions. The ghost appears for any value of the brane tension, although depending on the sign of the tension it is either the helicity-0 component of the lightest localized massive tensor of mass 0References


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