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
Abstract
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.
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