Leptogenesis and CP Violation in Neutrino Oscillations

Abstract

Assuming the seesaw and leptogenesis mechanisms, I give some general remarks on possible connection or disconnection between CP violation in heavy Majorana neutrino decays and that in neutrino oscillations. A simple but predictive ansatz is proposed to simultaneously interpret the observed baryon asymmetry of the universe and oscillations of solar and atmospheric neutrinos.

Comments: Talk given at ICHEP 2002, Amsterdam (to appear in the proceedings)