Seminar:   Right-handed Neutrinos and the (Dark Sector of the) Universe
Nick E. Mavromatos. King’s College London, UK

Friday, February 15 ^th, 2013 ……. 15:00 PM Theoretical Physics Seminar room
Abstract: I discuss the role of neutrinos, in particular right-handed sterile ones, in contributing to the dark sector of the Universe, especially in playing the role of dark matter. I start from a simplest extension of the standard model, proposed by Shaposhnikov and collaborators, which involves three right-handed Majorana massive neutrinos, and exploit astrophysical and cosmological constraints on the lowest of these extra states in order for it to be the dark matter candidate. This is consistent with current constraints, provided the mass ……..read more