Pi Rho Correlations In The Nn Potential

We evaluate the contribution to the nucleon-nucleon interaction due to correlated pi rho exchange in the pi, omega, and A(1)/H-1 channels by means of dispersion-theoretic methods based on a realistic meson-exchange model for the interaction between pi and rho mesons. This process has substantial effects: In the pionic channel it counterbalances the suppression generated by a soft pi NN form factor of monopole type with a cutoff mass of about 1 Gev; in the omega channel it provides a strong repulsive contribution, leaving little room for explicit quark-gluon effects.