Constraining dark matter self-interactions with the Large Scale Structure of the Universe

by Prof. Emanuele Castorina (università Milano)

Wednesday 5 Mar 2025, 13:30 → 14:30 Europe/Rome

A501 (Dip.to di Fisica Univ. Genova)

Astrophysical datasets on different scales provide convincing evidence for the existence of Dark Matter (DM), whose fundamental nature is however yet to be uncovered. Cosmology is in a unique position to explore the physics of the DM, by testing its properties directly and independently of any portals connecting it to the Standard Model. In this talk I will discuss how the distribution of galaxies at large scales can probe medium/long range self-interactions in the dark sector, and present the strongest bounds to date on such forces, which can be at most one hundred times weaker than gravity.