Informal Pizza Seminar

Gravitational Waves in a Codimension Two Braneworld

Claudia de Rham

McGill

I consider the propagation of gravitational waves in six dimensions induced by sources living on 3-branes embedded in a compactified bulk. At low energies ordinary gravity is reproduced, and will explicitly compute the leading corrections from six dimensional effects. After regulating the brane a logarithmic dependence on the cutoff scale of brane physics is found even for modes whose frequency is much less than this energy scale. I then discuss the inclusion of Gauss-Bonnet terms that have been used elsewhere to regulate codimension two branes and find that such terms do not regulate codimension two branes for compact extra dimensions.