Speaker
Dr
Oleg Ruchayskiy
(Ecole Polytechnique Federale de Lausanne)
Description
Analyses of the cosmic microwave background anisotropies and of galaxy
survey data allow for the possibility that dark matter particles were
born relativistic yet became non-relativistic well before matter-radiation
equality. Such "warm" or "cold plus warm" dark matter models may still
have observable signatures at sub-Mpc scales, e.g. modifying the structure of
galactic halos and their abundance. I will summarize these signatures
and discuss particle physics models that provide such candidates.
Although these dark matter particles have interaction strengths much
weaker than neutrinos, I will argue that the combination of data
from astrophysics, cosmology, and forthcoming particle physics
experiments will enable us to constrain these models and learn about the
properties of these candidates.
Author
Dr
Oleg Ruchayskiy
(Ecole Polytechnique Federale de Lausanne)
