Abstract

Equipotential plots are employed in the qualitative study of the coupling between S- and D-waves in trinucleon systems. Two forms of a two-pion exchange three-nucleon potential based on chiral symmetry are considered, namely that produced by the Tucson-Melbourne collaboration and a redefined version that excludes contact interactions. In both cases the contributions of the three-nucleon potential are comparable to those of two-nucleon interactions, showing that the usual treatment of the former by means of perturbation theory is not justified.

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