TWO-NUCLEON POTENTIALS FROM DISPERSION RELATIONS
Dispersion relations are applied to obtain the two-pionexchange nuclear potentials including the first order nonstatic effects. Calculation is made within the approximation in which only the contribution from the single nucleon intermediate state is considered for pion-nucleon scattering, though the S-wave suppression is considered. All the potentials are expressed in a spectral representation. It is shown that this form is suitable to distinguish the effects of low-energy pion exchange from those of high-energy exchange. The former can be reliably estimated; the latter are subjected to a cutoff and substituted by adjustable parameters. The potentials obtained are compared with phenomenological ones in terms of the spectral distributions of exchanged pions. Comparison of the method with the others for potential construction is made in relation to the problem of the coupling type between pions and nucleons. (auth)
- Research Organization:
- Tohoku Univ., Sendai
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-16-018382
- OSTI ID:
- 4819252
- Journal Information:
- Progr. Theoret. Phys. (Kyoto), Journal Name: Progr. Theoret. Phys. (Kyoto) Vol. Vol: 27
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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