Unification of the Standard Model and Dark Matter Sectors in [SU(5)$\times$U(1)]$^4$

Understand

A simple model of dark matter contains a light Dirac field charged under a hidden U(1) gauge symmetry.

• When a chiral matter content in a strong dynamics satisfies the t'Hooft anomaly matching condition, a massless baryon is a natural candidate of the light Dirac field.
• One realization is the same matter content as the standard SU(5)$\times$U(1)$_{(B-L)}$ grand unified theory.
• We propose a chiral [SU(5)$\times$U(1)]$^4$ gauge theory as a unified model of the SM and DM sectors.