R-F Parity And Almost Massless Up Quark

We introduce a parity R-F to introduce naturally small masses for the first family members and in particular an almost massless u-quark toward the strong CP solution. We also discuss the phenomenological implications of this model on the proton decay and the neutrino mass. Furthermore, it is possible to embed this R-F parity into the local U(1)(R) gauge symmetry. (C) 1999 Published by Elsevier Science B.V. All rights reserved.