We perform a nonperturbative calculation of the $J/\Psi -\pi$ cross section using a $\mathrm{SU}\left(2\right)\mathrm{}\times \mathrm{SU}\left(2\right)\mathrm{}$ effective Lagrangian. Our results differ from those of previous calculations, especially in the description of vertices involving pions.

• Received 20 March 2001

DOI:https://doi.org/10.1103/PhysRevC.64.021901