20-27 July 2011
Alpes Congrès - Alpexpo
Europe/Paris timezone

Dark Energy and Modified Gravity

22 Jul 2011, 09:00
35m
Berlioz (Alpes Congrès - Alpexpo)

Berlioz

Alpes Congrès - Alpexpo

Parallel session talk Cosmology and Gravity

Speaker

Dr Philippe Brax (CEA-Saclay)

Description

Despite more than 10 years of intense experimental and theoretical work, no plausible explanation to the acceleration of the universe is available yet. Dark energy and modified gravity are two likely candidates. I will review their current status and state the problems that they both face. In particular, it turns out that at low energy both approaches reduce to scalar field models essentially. In both cases, the scalar degree of freedom may induce deviations from Newton's law in the solar system and the laboratory, a phenomenon which needs to be screened off. I will present the different screening mechanisms and how the study of large scale structures of the Universe may help to distinguish dark energy/modified gravity models. Eventually I will concentrate on possible laboratory tests of these models and even some consequences for collider physics.

Primary author

Dr Philippe Brax (CEA-Saclay)

Presentation Materials