1998/08/31 by P. Ramond
Physics and Astronomy · #hep-ph
published as Invited Talk at Orbis Scientiae, Miami, Dec 1977 · 16 pages, uses article.sty
arxiv created 1998/08/31 · arxiv updated 2009/11/30
A gauged phase symmetry with its anomalies cancelled by a Green-Schwarz mechanism, broken at a large scale by an induced Fayet-Iliopoulos term, is a generic feature of a large class of superstring theories. It induces many desirable phenomenological features: Yukawa coupling hierarchy, the emergence of a small Cabibbo-like expansion parameter, relating the Weinberg angle to b-τ unification, and the linking of R-parity conservation to neutrino masses. Some are discussed in the context of a three-family model which reproduces all quark and lepton mass hierarchies as well as the solar and atmospheric neutrino oscillations.