Split NMSSM from dimensional reduction of a $10D$, $\mathcal{N}=1$ $E_8$ over $SU(3)\mathrm{/}U(1)\times U(1)\times Z_3$

We examine an extension of the Standard Model which results from a $10D$, $\mathcal{N}=1$, $E_8$ gauge theory. The theory is dimensionally reduced over a $M_4\times B_0\mathrm{/}{\mathbf{Z}}_3$ space, where $B_0$ is the nearly-Kähler manifold $SU(3)\mathrm{/}U(1)\times U(1)$ and ${\mathbf{Z}}_3$ is a freely acting discrete group on $B_0$ that triggers a Wilson flux breaking, leading to an $\mathcal{N}=1$, $SU(3{)}^3\times U(1{)}^2$ effective theory in $4D$. At lower energies we are left with the Split NMSSM. Its 2-loop analysis yields third generation quark and light Higgs masses within the experimental limits and predicts a neutralino LSP mass $<800$ GeV.