A one-boson-exchange potential (OBEP) with six kinds of bosbns (rr, rJ, p, w, 7J and lJ) is treated in momentum space to describe the nucleon-nucleon interaction below 400MeV. Integral equations containing OBEP with full nonstatic effects are solved numerically. All the experimental phase shifts for the states with L;:;;;1 are well reproduced by adjusting only four parameters of w-nucleon coupling constant g~/4rr, lJ-nucleon coupling constant g~/4rr, rJ-nucleon coupling constant gl1 2 /4rr and mass of rJ-meson m 11 • The contribution from 7Jcmeson exchange is shown to be small. S-state phase shifts are also reproduced if the contribution from higher momentum part is cut off. A list of all the matrix elements of the nonstatic OBEP is given. § 1. IntroductionAs experimental data on various polarization parameters have revealed, nonstatic effects of nuclear forces are important even at moderately low energies. These effect's have been investigated largely on the basis of potential models represented in coordinate space. However, any theory in coordinate space is more or less unsatisfactory in that nonstatic effects are taken into account only partially. The theory is particularly inconvenient if we intend to extend it into higher energy region. Theories in momentum space are expected to remove this difficulty. 2 l-5 l It has been made clear that one-boson-exchange model (OBE model) is valid at least qualitatively to explain the nuclear forces in the inner region surrounding the nucleon core. 6 l The success in the explanation of the strong L · S force found in this region may be regarded as a main result of the model. Furthermore, it has also been conjectured that the repulsive core which is characteristic of the nuclear forces in the innermost region could be interpreted by the exchange of a meson, especially an is·oscalar vector meson (J).The one-boson-exchange model in momentum space has been investigated by Gotzmann and Hochberg 7 l and especially by Wada. 6 l However, their work has studied only some parts of all possible states in the t~o-nucleon system. Especially, triplet-coupled states remain untouched in spite of their importance in an-

1123Results of a phase shift analysis of the p-p scattering data at 2.2 Ge V and 1.4 Ge V are reported and are compared with those of the Regge-pole model for high energy scattering. It is suggested that the picture on two nucleon interactions deduced at low energies must change around 2 GeV rapidly to the one at high energies. ) Our reexamination is therefore how the previously obtained solutions will change if the D ( rv90°) is measured and turns out to be positive also at 1.4 Ge V. As will be shown in § 4, Sol. A is improved so that it forms a more continuous family than before with the corresponding solutions at neighboring energies.As shown by experimental data, the P-P total cross-section and the real to the imaginary ratio of the forward scattering amplitude retain their asymptotic energydependence even at energies as low as rv2 Ge V. This seems to allow to apply the Regge-pole model for high-energy scattering 8 )-lO) down to rv2 Ge V, and to at NERL on

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