Unification and Dark Matter in a Minimal Scalar Extension of the Standard Model

Understand

The six Higgs doublet model is a minimal extension of the Standard Model that addresses dark matter and gauge coupling unification.

• Another Higgs doublet in a 5 representation of a discrete symmetry group, such as S_6, is added to the SM.
• The lightest components of the 5-Higgs are neutral, stable and serve as dark matter so long as the discrete symmetry is not broken.
• Direct and indirect detection signals, as well as collider signatures are discussed.