Deuteron Compton scattering below pion photoproduction threshold
Abstract
Description
Deuteron Compton scattering below pion photoproduction threshold is considered in the framework of the nonrelativistic diagrammatic approach with the Bonn OBE potential. A complete gauge-invariant set of diagrams is taken into account which includes resonance diagrams without and with NN-rescattering and diagrams with one- and two-body seagulls. The seagull operators are analyzed in detail, and their relations with free- and bound-nucleon polarizabilities is discussed. It is found that both dipole and higher-order polarizabilities of the nucleon are needed for a quantitative description of recent experimental data. An estimate of the isospin-averaged dipole electromagnetic polarizabilities of the nucleon and the polarizabilities of the neutron is obtained from the data.
48 pages, 16 figures, final version; discussion is slightly extended, a few references added, a figure for asymmetry is replaced
48 pages, 16 figures, final version; discussion is slightly extended, a few references added, a figure for asymmetry is replaced