Speaker
Matteo Lucca
(ULB)
Description
In this talk I will consider a very popular scenario where the dark energy is a dynamical fluid whose energy density can be transferred to the dark matter, and vice versa, via a coupling function proportional to the energy density of the dark energy. In particular, I will discuss this model’s ability to address the $H_0$ and $S_8$ tensions showing that considering data from Planck, BAO and Pantheon the model 1) can only minimally alleviate the $H_0$ tension but 2) can significantly reduce the significance of the $S_8$ tension without exacerbating nor introducing any other tension (such as the $H_0$ tension) and without worsening the fit to the considered data sets with respect to the ΛCDM model.
Primary author
Matteo Lucca
(ULB)
