I will present the quartification Grand Unified Theory as a new extension of the supersymmetric trinification model with a local family SU(3)_F symmetry. I will discuss its origin inspired by the breaking of E8 into E6 x SU(3)_F and will briefly address how such a construction may possibly provide a chiral theory. The evolution of the gauge couplings to low energy-scales will be thoroughly investigated taking into account possible non-universalities in the unification condition emerging from higher dimensional operators. It will be shown that such corrections to the gauge-kinetic function have a significant impact on the subsequent breaking scales, thus on the scale of new-physics. Based on this analysis I will classify possible low-energy scenarios, how can we address the fermion mass hierarchies and mixing, and which new phenomena are expected.
|Parallel Session||Supersymmetry: Models, Phenomenology and Experimental Results|