What are major fruits harvested from charmonium spectroscopy?

[BuckeyePhysicist]

Discovery of charm quark,

...


Pls add more ...

 

[arivero]

An amazing coincidence is that the reduced decay rate of J/Psi (the decay rate divided by the cube of its mass) coincides with the one of the pion, which is a spin zero composite. This is an unexplored result.

Discovery of charm quark,

...Pls add more ...

As for your original question: understanding of QCD

 

[BuckeyePhysicist]

Well, I konw we understand QCD better. But could a few specific items be listed, sort of?