Collective Quartics from Simple Groups

Understand

This article classifies Little Higgs models that have collective quartic couplings.

• There are two classes of collective quartics: Special Cosets and Special Quartics.
• After taking into account dangerous singlets, the smallest Special Coset models are SU(5)/SO(5) and SU(6)/Sp(6).
• The smallest Special Quartic model is SU(5)/SU(3) x SU(2) x U(1) and has not previously been considered as a candidate Little Higgs model.