The last what I heard about this issue are messages from Catija here in chat - they can be seen
among starred messages. But since mods have private rooms and other possibilities to communicate with SE, it's possible that you have talked about this elsewhere.
There exists a popular model in the Physics of heavy quark bound systems, called the Cornell potential model, in which the inter-quark potential is modeled to vary with radial distance $r$ as
$$V(r) = - \frac{\kappa}{r} + \frac{r}{a^2}$$
The mathematical problem is reduced to solving the radi...
