180 citations · 378 across the 6 of their papers we have counts for
5 papers
On the Brane Cosmology of KK Gravitinos
Federico R. Urban
In this report I consider the cosmology of KK gravitinos in models with extra dimensions, in particular in connection with the known non--standard high energy regime of expansion w…
Dynamical vacuum energy via adjustment mechanism
A. D. Dolgov, F. R. Urban
A new mechanism of adjustment of vacuum energy down to the observed value from an initially huge one is considered. The mechanism is based on a very strong variation of the gravita…
Natural extension of the Generalised Uncertainty Principle
C. Bambi, F. R. Urban
We discuss a gedanken experiment for the simultaneous measurement of the position and momentum of a particle in de Sitter spacetime. We propose an extension of the so-called genera…
Brane Cosmology and KK Gravitinos
C. Bambi, F. R. Urban
The cosmology of KK gravitinos in models with extra dimensions is considered. The main result is that the production of such KK modes is not compatible with an epoch of non--standa…
Braneworld graviton interactions in early universe phase transitions
Rizwan U. H. Ansari, Cedric Delaunay, Rhiannon Gwyn +4
These are proceedings for the Les Houches Summer School ``Particle Physics and Cosmology: the Fabric of Spacetime,'' held in Les Houches, France, July 31--August 25, 2006. We summa…