Predictions of SU(9) orbifold family unification

We study predictions of orbifold family unification models with SU(9) gauge group on a six-dimensional space–time including the orbifold T2/Z2, and obtain relations among sfermion masses in the supersymmetric extension of models. The models have an excellent feature that just three families of the standard model fermions exist in a pair of Weyl fermions in the 84 representation as four-dimensional zero modes, without accompanying any mirror particles