Physics

Baryon

Quarkonium

Particle physics

Wave function

Diquark

Quark model

Quantum mechanics

Charm (quantum number)

Quark

Physical review. C

We discuss the adequate treatment of the three- and four-body dynamics for the quark model picture of double-charm baryons and tetraquarks. We stress that the variational and Born-Oppenheimer approximations give energies very close to the exact ones, while the diquark approximation might be somewhat misleading. The Hall-Post inequalities also provide very useful lower bounds that exclude the possibility of stable tetraquarks for some mass ratios and some color wave functions.

Few-body quark dynamics for doubly heavy baryons and tetraquarks