Comment Re:Hang on (Score 1) 111
There's no real way to "confirm" the number of quarks. Quark number is not a conserved quantum number, so every particle exists as a superposition of different quark numbers. This is particularly problematic if you probe a particle at very high energies; at sufficiently high energies, every hadron (including the humble proton) appears to be a soup of quark-antiquark pairs bubbling out of the vacuum. However, you should be able to make predictions of what the particle's properties will be if it's mostly like a particle that has 4 quarks (really 2 quarks and 2 antiquarks) versus if it's mostly like a particle that is 2 loosely bound mesons (1 quark and 1 antiquark plus 1 quark and 1 antiquark). But there's no definitive way to distinguish between the two.
It's also noteworthy that neither tetraquarks nor mesonic molecules have been previously seen in two experiments. So no matter which it turns out to be mostly like, it's still a discovery.