Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2002-08-15
Physics
Nuclear Physics
Nuclear Theory
8 pages Latex, 2 eps figures. Contribution to the conference "Exclusive Processes at High Momentum Transfer", held at Jefferso
Scientific paper
We discuss the high energy photodisintegrataion of light nuclei in which the energy of the absorbed photon is equally shared between two nucleons in the target. For these reactions we investigate the model in which photon absorption by a quark in one nucleon followed by its high momentum transfer interaction with a quark of the other nucleon leads to the production of two nucleons with high relative momentum. We sum the relevant quark rescattering diagrams, and demonstrate that the scattering amplitude can be expressed as a convolution of the large angle NN scattering amplitude, the hard photon-quark interaction vertex and the low-momentum nuclear wave function. Within this model we calculate the cross sections and polarization observables of high energy gamma + d --> pn and gamma + ^3He --> pp + n reactions.
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