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A nucleon-nucleon potential consistent with experiment and the boson exchange theory of nuclear forces

1968; Elsevier BV; Volume: 48; Issue: 1 Linguagem: Inglês

10.1016/0003-4916(68)90271-6

1096-035X

Earle L. Lomon, Herman Feshbach, Herman Feshbach,

Nuclear physics research studies

The nucleon-nucleon data are fitted by a boundary condition model interaction determined largely by field-theoretic forms. One and two pions, ϱ, ω, and η meson exchange adiabatic local potentials determine th interaction for r ⩾ 12μ where (1/μ) is the pion Compton wavelength. The two-pion-exchange contribution contains a degree of ambiguity measured by the parameters ξ and λ for the pion-ladder and nucleonpair diagrams respectively. The interaction at r0 is given by an energy-independent boundary condition for each partial wave sensitive to the short-range interaction. A very good fit to the pp data and a good fit to the np data below 350-MeV-nucleon laboratory energy comparable to the better phenomenological fits are obtained. The optimum or fixed value of exchange-particle masses and coupling constants correspond to their available measured values, and the λ and ξ parameters optimize in their theoretical range. The value obtained for r0 corresponds to that predicted by the theory of the boundary-condition model. There remain 19 boundary-condition parameters freely fitted to which the data is sensitive. Rescattering and long-range recoil corrections remain to be investigated, as does the effect of coupling to inelastic channels.