Speaker
Julien Lesgourgues
(TTK, RWTH Aachen University)
Description
I will briefly review the currently confusing situation regarding cosmological bounds on the neutrino mass. In the future, there is a hope to clarify the situation by detecting the actual neutrino free-streaming effect in large-scale structures. In this regard, I will present a new method allowing to easily incorporate the scale-dependance of the growth factor induced by massive neutrinos (or potentially by non-standard dark matter) in analytical predictions for the matter power spectrum, without recurring to more complicated equations, but simply by playing with specific gauge transformations.