24-28 April 2017
Palais des Papes, Avignon
Europe/Paris timezone

Effective theory of dark energy and kinetic matter mixing

25 Apr 2017, 15:40
15m
Chambre du Trésorier (Palais des Papes, Avignon)

Chambre du Trésorier

Palais des Papes, Avignon

Speaker

Mr Mancarella Michele (IPhT - CEA Saclay)

Description

The "Effective theory of dark energy" is a simple, general and effective way to bridge theory and observations in dark energy and modified gravity scenarios based on a single scalar field. I will illustrate its application to models that admit a kinetic mixing between matter and the scalar field, which I’ll call "Kinetic Matter Mixing". I will argue that this is a truly physical effect independent of the metric used to describe the action and show that it has the peculiar consequence of weakening gravity on short scales. Finally, I will discuss the impact on the matter power spectrum and the angular power spectrum of the CMB computed with a Boltzmann code, without resorting to the quasi-static approximation, and comment on the validity of the latter.

Primary author

Mr Mancarella Michele (IPhT - CEA Saclay)

Presentation Materials