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Low- and intermediate-energy nucleon-nucleon interactions and the analysis of deuteron photodisintegration within the dispersion relation technique | | A. V. Anisovich
; V. A. Sadovnikova
; | | Date: |
14 Dec 1999 | | Journal: | Eur.Phys.J. A2 (1998) 199-221 | | Subject: | nucl-th | | Abstract: | The nucleon-nucleon interaction in the region of the nucleon kinetic energy up to 1000 MeV is analysed together with the reaction $gamma d o pn$ in the photon energy range $E_{gamma}=0-400$ MeV. Nine nucleon-nucleon $s$-channel partial amplitudes are reconstructed in the dispersion relation $N/D$ method: $^1S_0$, $^3S_1-^3D_1$, $^3P_0$, $^1P_1$, $^3P_1$, $^3P_2$, $^1D_2$, $^3D_2$ and $^3F_3$. Correspondingly, the dispersive representation of partial amplitudes $NDelta o pn$, $NN^* o pn$ and $NNpi o pn$ is given. Basing on that, we have performed parameter-free calculation of the amplitude $gamma d o pn$, taking into account: $(i)$ pole diagram, $(ii)$ nucleon-nucleon final-state rescattering $gamma d o pn o pn$, and $(iii)$ inelastic final-state rescatterings $gamma d o NDelta(1232) o pn$, $gamma d o NN^*(1400) o pn$ and $gamma d o NNpi o pn$. The $gamma d o pn$ partial amplitudes for nine above-mentioned channels are found. It is shown that the process $gamma d o pn o pn$ is significant for the waves $^1S_0$, $^3P_0$, $^3P_1$, at $E_{gamma} =50 -100$ MeV, while $gamma d o NDelta o pn$ for the waves $^3P_2$, $^1D_2$,$^3F_3$ dominates at $E_{gamma} > 300$ MeV. Meson exchange current contributions into the deuteron disintegration are estimated: they are significant at $E_gamma =100-400$ MeV. | | Source: | arXiv, nucl-th/9912030 | | Services: | Forum | Review | PDF | Favorites | |
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