Seminar 
Title: Searching for the Origin of Matter and Neutrino Masses at CEPC and FCC 
Speaker: Prof.Marco Drewes (TUM) 
Time: 2:00 PM, June 5th, 2017 (Monday) 
Place: Theoretical Physics Division，319 

Abstract: Heavy neutrinos with masses below the electroweak scale can simultaneously generate the light neutrino masses via the seesaw mechanism and the baryon asymmetry of the universe via leptogenesis. The requirement to explain these phenomena imposes constraints on the mass spectrum, flavour mixing pattern and CP properties of the heavy neutrinos. We combine these with bounds from different experiments in the past to map the viable parameter regions in which experiments at a future lepton colliders can find the heavy neutrinos and discover the common origin of neutrino masses and matter in the universe.