Are there any technical limitations (theoretical or technological) that prevent quark based colliders? ie. Colliding two quarks together.
The success of the Standard model in organizing our particle data is also based on the strong interaction SU(3) color, which displays asymptotic freedom.
To get free quarks so that you can have quark-quark scattering you either"
go to very small distances, and it is impossible to do a controlled scattering at those small distances,
very large energies, energies that prevailed before nucleosynthesis after the Big Bang. Again there is no possibility of carrying controlled scattering experiments.
We study the collective behavior of quarks in the quark gluon plasma at current accelerators,
It is a matter of ongoing research, and will give a handle by deciphering the statistical behavior of quark quark scattering in the plasma.