Constituent description ofNNelastic scattering observables at large angles

We suggest that the constituent picture of nucleon-nucleon elastic scattering can be tested by the spin-correlation measurements $A_{\mathrm{ll}}$, $A_{\mathrm{ss}}$, $A_{\mathrm{nn}}$, and $A_{\mathrm{sl}}$. These measurements provide a means for isolating various reaction mechanisms, including possible quantum-chromodynamic instanton effects. We give specific model calculations to illustrate these ideas.