Maths HEP Lunchtime Seminars: Strong Gravity on Branes
26 April 2002 00:00 in CM221
"The non-linear behaviour of matter on orbifold planes is investigated in the context of Randall-Sundrum gravity. In the two brane case, the long range effective theory is obtained via a derivative expansion, treating the radion non-linearly. Using this, we investigate whether branes may be forced to touch even when all curvatures are small. This leads to the intruiging possibility that such brane collisions may occur in `low energy' astrophysical contexts. In the one brane case we develop new elliptic numerical techniques to compute regular bulk geometries sourced by static spherically symmetric matter on the brane. We apply these to show that 4-dimensional gravity is recovered for star-like large low density deformations, and to investigate the behaviour of 'small' objects on the brane, which is found to be qualitatively similar to 4-d gravity."