Correlated $\bbox{πρ}$ Exchange in the $\bbox{NN}$ Interaction

We evaluate the contribution to the nucleon-nucleon interaction due to correlated $πρ$ exchange in the $π$, $ω$, and $A_1$/$H_1$ channels by means of dispersion-theoretic methods based on a realistic meson exchange model for the interaction between $π$ and $ρ$ mesons. These processes have substantial effects: In the pionic channel it counterbalances the suppression generated by a soft $πNN$ form factor of monopole type with a cutoff mass of about 1 GeV; in the $ω$-channel it provides nearly half of the empirical repulsion, leaving little room for explicit quark-gluon effects.

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