Classifications of hadrons, unitarity symmetries of hadron, quark model.
In the framework of the standard model of symmetry breaking explained, but the need to be extended to three quark model family.
Variational calculus is performed to calculate the masses of heavy and light tetraquarks within the framework of the relativistic quark model.
The question of whether it makes sense to say quarks really exist if you can never isolate one was a controversial issue in the years after the quark model was first proposed.
