4 ms·
> The underlying theory, QCD, predicts that free particles (hadrons)^1 are bound states of quarks, and in this case bound states of two quarks and two anti-quar
by jessriedel 10y ago
> The underlying theory, QCD, predicts that free particles (hadrons)^1 are bound states of quarks, and in this case bound states of two quarks and two anti-quarks.
Even though we presume to know the dynamical equations of QCD exactly, I am pretty sure it was never shown rigorously that tetraquarks are possible under those equations.