Chiral $3\pi$-exchange NN-potentials: results for representation invariant classes of diagrams

Abstract

We calculate in (two-loop) chiral perturbation theory the local NN-potentials generated by certain classes of three-pion exchange diagrams. We stress that the chiral $3\pi NN$-contact vertex depends on the particular choice of the interpolating pion-field and therefore one has to consider representation invariant classes of diagrams by supplementing graphs involving the chiral $4\pi$-vertex. We find that the resulting isovector spin-spin and tensor NN-potentials are negligibly small for $r\ge 0.8$ fm. One can conclude that the effects of uncorrelated chiral $3\pi$-exchange in the NN-interaction are very small and therefore of no practical relevance.

8 pages, 4 figures

References in corpus (4)

• Peripheral Nucleon-Nucleon Phase Shifts and Chiral Symmetry
• Peripheral NN-Scattering: Role of Delta-Excitation, Correlated Two-Pion and Vector Meson Exchange
• Chiral two-pion exchange and proton-proton partial-wave analysis
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