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Newtonian Gravity in Theories with Inverse Powers of R
Arvind Rajaraman
We discuss theories with inverse powers of the Ricci scalar. We find the exact metric produced by point masses in these theories, and show that the gravitational force between stat…
Supergravity Solutions for branes
Jason Kumar, Arvind Rajaraman
We find a large class of supersymmetric solutions in the background with NS fluxes. This two-parameter family of solutions preserves 8 of the 16 supersymmetries…
Graviton Cosmology in Universal Extra Dimensions
Jonathan L. Feng, Arvind Rajaraman, Fumihiro Takayama
In models of universal extra dimensions, gravity and all standard model fields propagate in the extra dimensions. Previous studies of such models have concentrated on the Kaluza-Kl…
SuperWIMP Dark Matter Signals from the Early Universe
Jonathan L. Feng, Arvind Rajaraman, Fumihiro Takayama
Cold dark matter may be made of superweakly-interacting massive particles, superWIMPs, that naturally inherit the desired relic density from late decays of metastable WIMPs. Well-m…
Superweakly Interacting Massive Particles
Jonathan L. Feng, Arvind Rajaraman, Fumihiro Takayama
We investigate a new class of dark matter: superweakly-interacting massive particles (superWIMPs). As with conventional WIMPs, superWIMPs appear in well-motivated particle theories…
New Supergravity Solutions for Branes in AdS_3 x S^3
Jason Kumar, Arvind Rajaraman
We find explicit supergravity solutions which describe branes in the AdS_3 x S^3 background. These solutions preserve 8 of the 16 supersymmetries of this background, and are consis…