Seesaw and the Riddle of Mass

Abstract

The prediction of small neutrino masses through the Seesaw Mechanism and their subsequent measurement suggests that the natural cut-off of the Standard Model is very high indeed. The recent neutrino data must be interpreted as a reflection of physics at very high energy. We examine their implications in terms of ideas of Grand Unification and Supersymmetry, and as possible hints for a unified theory of flavor.

Comments: Invited Talk, Seesaw 25, Institut Henri Poincaré, June 10-11, 2004, PAris, France