Lecture presented by Françoise COMBES, French Académie des Sciences, Bureau des longitudes, College de France, Observatoire de Paris
The problem of missing mass in the universe, on a scale of galaxies, of large structures, and especially of overall content, is a multi-faceted enigma. Since 1985, we know that this matter is non-baryonic and does not exist in the standard particle model. The main candidate is the neutralino, the most stable neutral particle in the hierarchy of super-symmetrical particles. However, supersymmetry does not appear as expected in the LHC experiments at CERN. Many other models have flourished in recent years, we will describe the main: axions, superfluid matter, condensate of Bose-Einstein, sterile neutrinos, modified gravity…
Free entry within the limit of available seats
In collaboration with the Department of Geosciences, Ecole Normale Superieure.