Triality,exotics and the dynamical basis of the quark model

A non-relativistic three-triplet model with a simple two-body interaction is shown to bind only q$\text{q}$ and qqq states. Three triplets and unobserved charmed states are crucial in preventing binding of 4q$\text{q}$ and 2 q$\text{q}$ systems. They provide repulsive channels to make the q$\text{q}$ and 3q systems behave like “neutral atoms” with canceling attractive and repulsive forces between them and additional quarks. The ratio of q$\text{q}$ and qq interactions is just right to bind the q$\text{q}$ and 3q systems properly while leaving the qq system with the mass of a quark.