513 citations · 8.5k across the 224 of their papers we have counts for
7 papers · 1 filter
Effective actions of a Gauss-Bonnet brane world with brane curvature terms
Ph. Brax, N. Chatillon, D. A. Steer
We consider a warped brane world scenario with two branes, Gauss-Bonnet gravity in the bulk, and brane localised curvature terms. When matter is present on both branes, we investig…
Chameleon Dark Energy
Ph. Brax, C. van de Bruck, A. C. Davis +2
Chameleons are scalar fields whose mass depends on the environment, specifically on the ambient matter density. While nearly massless in the cosmos, where the matter density is tin…
Is the radion a chameleon?
Ph. Brax, C. van de Bruck, A. -C. Davis
The chameleon mechanism is a way to give an effective mass to a light scalar field via field self-interaction and interaction with matter. We study this mechanism in models in whic…
Detecting Dark Energy in Orbit -- the Cosmological Chameleon
Philippe Brax, Carsten van de Bruck, Anne-Christine Davis +2
We show that the chameleon scalar field can drive the current phase of cosmic acceleration for a large class of scalar potentials that are also consistent with local tests of gravi…
The 4d effective action of 5d gauged supergravity with boundaries
Ph. Brax, N. Chatillon
We consider gauged five dimensional supergravity with boundaries and vector multiplets in the bulk. We analyse the zero modes of the BPS configurations preserving N=1 supergravity…
Soft Supersymmetry Breaking on the Brane
Ph. Brax, N. Chatillon
We consider the low energy description of five dimensional models of supergravity with boundaries comprising a vector multiplet and the universal hypermultiplet in the bulk. We ana…