Low- and intermediate-energy nucleon-nucleon interactions and the analysis of deuteron photodisintegration within the dispersion relation technique
A.V. Anisovich - V.A. Sadovnikova
Petersburg Nuclear Physics Institute, Gatchina, St.Petersburg 188350, Russia
Received: 24 November 1997 Communicated by B. Povh
Nucleon-nucleon interactions in the region of the nucleon kinetic energies up to 1000 MeV are analysed together with the reaction in the photon energy range up to MeV. The following nucleon-nucleon s-channel partial amplitudes are reconstructed in the dispersion relation N/D method: 1S0, 3S1-3D1, 3P0, 1P1, 3P1, 3P2, 1D2, 3D2 and 3F3. Correspondingly, the dispersive representation of partial amplitudes , and is given and parameters which determine these two baryon amplitudes are found. Basing on that, we have performed parameter-free calculation of the amplitude , taking into account: (i) pole diagram, (ii) nucleon-nucleon final-state rescattering , and (iii) inelastic final-state rescatterings , and . The partial amplitudes for the above-mentioned channels are found. It is shown that the process is significant for the waves 1S0, 3P0, 3P1, at MeV, while dominates for the waves 3P2, 1D2, 3F3 at MeV. Meson exchange current contributions into the deuteron disintegration are estimated: they are significant at MeV.