Mass shift of charmonium states in $\bar{p}A$ collision

Gy. Wolf, G. Balassa, P. Kovács +2

The masses of the low lying charmonium states, namely, the $J/\Psi$, $\Psi (3686)$, and $\Psi (3770)$ are shifted downwards due to the second order Stark effect. In $\bar{p}+\text{Au}$ colli…