Unification above the string mass scale
Abdel Pérez-Lorenzana, William A. Ponce · arXiv (Cornell University) · 1998
We present a grand unified theory based on the supersymmetric $SU(3)_L\\otimes SU(3)_{CL}\\otimes SU(3)_{CR}\\otimes SU(3)_R$ gauge group, which unifies in one single step the three gauge couplings of the standard model at an scale $M\\sim 10^{18}$ GeV, and spontaneously breaks down to $SU(3)_c\\otimes U(1)_{EM}$ using only fundamental representations of SU(3). In this model the proton is perturbatively stable, the doublet-triplet problem is lessened, and the see-saw mechanism for the neutrinos is easily implemented. There is also in the model an extra tiny mass sterile neutral particle for each generation which can be used to solve the neutrino puzzle.