APC colloquium “Dark matter beyond WIMPs : light, warm, fuzzy and others” on Friday, June 15


Eric Armengaud (IRFU/DPhP CEA Saclay) kindly accepted to give a colloquium entitled Dark matter beyond WIMPs : light, warm, fuzzy and others”,at 11am on Friday, June 15, in room 454A of Condorcet building at Université Paris Diderot.

Title: Dark matter beyond WIMPs : light, warm, fuzzy and others.

Abstract: Many astrophysical and cosmological observations can only be interpreted assuming the existence of a dark matter component in the Universe. However the nature of this physical object remains unknown. The WIMP paradigm, one hypothesis which has been put forward for a long time, is more and more constrained by collider and direct/indirect detection experiments. I will present some other particle-physics-based hypothesis which received increasing attention in the recent years : MeV-scale strongly interacting particles, keV sterile neutrinos or bosons, QCD axions with micro-eV mass, and even lighter axion-like particles down to the fuzzy dark matter scenario at 10^{-22} eV. I will show how experiments or observations can test them, focusing on the small-scale Lyman alpha forest observations which indeed constrain several of these dark matter models.