Neutrino masses, dark matter and baryon asymmetry of the Universe

Abstract

In this work, we try to explain the neutrino mass and mixing data radiatively at three-loop by extending the standard model (SM) with two charged singlet scalars and three right handed (RH) neutrinos. Here, the lightest RH neutrino is a dark matter candidate that gives a relic density in agreement with the recent Planck data, the model can be consistent with the neutrino oscillation data, lepton flavor violating processes, the electroweak phase transition can be strongly first order; and the charged scalars may enhance the branching ratio $h\to \gamma \gamma$, where as $h\to \gamma Z$ get can get few percent suppression. We also discuss the phenomenological implications of the RH neutrinos at the collider.

Comments: 10 pages, 5 figures, based on talks given PASCOS2013 (Taipei, Taiwan) and The first Franco-Algerian Workshop on Neutrino Physics, Constantine, Algeria