146 citations · 207 across the 5 of their papers we have counts for
5 papers
The cosmological constant from the ghost. A toy model
Federico R. Urban, Ariel R. Zhitnitsky
We suggest that the solution to the cosmological vacuum energy puzzle is linked to the infrared sector of the effective theory of gravity interacting with standard model fields. We…
The cosmological constant as a manifestation of the conformal anomaly?
Evan C. Thomas, Federico R. Urban, Ariel R. Zhitnitsky
We propose that the solution to the cosmological vacuum energy puzzle may come from the infrared sector of the effective theory of gravity, where the impact of the trace anomaly is…
Axion braneworld cosmology
Cosimo Bambi, Masahiro Kawasaki, Federico R. Urban
We study axion cosmology in a 5D Universe, in the case of flat and warped extra dimension. The comparison between theoretical predictions and observations constrains the 5D axion d…
Gravitational production of KK states
Cosimo Bambi, Federico R. Urban
Gravitational particle production in the context of braneworlds is considered from a phenomenological point of view. The production of KK modes for bulk fields is discussed and the…
Gravitational particle production in braneworld cosmology
C. Bambi, F. R. Urban
Gravitational particle production in time variable metric of an expanding universe is efficient only when the Hubble parameter is not too small in comparison with the particle…