Chiral 3 pi exchange N N potentials: Results for representation invariant classes of diagrams
Oct, 1999Citations per year
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 -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 -vertex. We find that the resulting isovector spin-spin and tensor NN-potentials are negligibly small for fm. One can conclude that the effects of uncorrelated chiral -exchange in the NN-interaction are very small and therefore of no practical relevance.- nucleon nucleon: potential
- pi: exchange
- exchange: (3pi)
- Feynman graph: higher-order
- perturbation theory: chiral
- effective Lagrangian
- vertex function: (2nucleon 3pi)
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