Mesonic Contribution to the Compton Scattering Amplitude for Heavy Nuclei

Details Mesonic Contribution to the Compton Scattering Amplitude for Heavy Nuclei Mesonic Contribution to the Compton Scattering Amplitude for Heavy Nuclei

1995-09-29

arxiv.org/abs/nucl-th/9509044v1

Nucl.Phys. A609 (1996) 391-410

Physics

Nuclear Physics

Nuclear Theory

21 pages, Latex, 12 figures available at http://www.physik2.gwdg.de/lokales/Forschungsberichte/Theorie/Meson

Scientific paper

10.1016/S0375-9474(96)00270-9

The contribution of mesonic exchange currents to nuclear Compton scattering is investigated within the framework of a Fermi gas model of nuclear matter in the non-relativistic limit. The additional interaction between the nucleons is accounted for by including two- and three-body diagrams. As a test of this model, the enhancement constant $\kappa $ is calculated. The full correlators for the central and tensor part of the nucleon-nucleon interaction due to pion exchange are obtained and the energy dependence of the amplitude is investigated. The contribution of the $\Delta $-excitation to the mesonic part of the Compton amplitude is calculated explicitely using an effective Hamiltonian in the static limit.

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