Conformality from field-string duality on Abelian orbifolds

If the standard model is embedded in a conformal theory, what is the simplest possibility? We analyze all Abelian orbifolds for discrete symmetry Zₚ with $p<~7,$ and find that the simplest such theory is indeed SU(3)⁷. Such a theory predicts the correct electroweak unification (sin²θ0.231). A color coupling αC(M)0.07 suggests a conformal scale M near to 10 TeV.