From Neutrino Masses to Proton Decay

Current theoretical and experimental issues are reviewed in the light of the recent SuperKamiokande discovery. By using quark-lepton symmetries, derived from Grand Unification and/or string theories, we show how to determine the necessary neutrino parameters. In addition, the seesaw neutrino masses set the scale for the proton decay operators by ``measuring'' the standard model cut-off. The SuperKamiokande values suggest that proton decay is likely to be observed early in the XXIst Century.Comment: Invited Talk at the Workshop on the Next generation Nucleon decay and Neutrino detector (NNN99), September 23-25, 1999. Latex, 9 page

Still in Light-Cone Superspace

The recently formulated Bagger-Lambert-Gustavsson (BLG) theory in three dimensions is described in terms of a constrained chiral superfield in light-cone superspace. We discuss the use of Superconformal symmetry to determine the form of its interactions, in complete analogy with N=4 SuperYang-Mills in four dimensions.Comment: Invited Talk at Shifmania, St PAul-Minneapolis, May 200

The Five Instructions

Five elementary lectures delivered at TASI 2011 on the Standard Model, its extensions to neutrino masses, flavor symmetries, and Grand-Unification