Abstract
The effect of the relativistic one-body ( Delta rho 1) and two-body ( rho 2) charge density is considered in the Thomas-Reiche-Kuhn deuteron photoabsorption sum rule sigma 0 and in the E1 bremsstrahlung-weighted cross section for different NN potential models. rho 2 includes all the terms, local and non-local, deriving from the one-pion exchange processes, calculated both in pseudoscalar and in pseudovector pi N coupling. Delta rho 1 also includes the kinematical corrections to the wavefunctions. The results are compared with those obtained in the exact calculation of the total cross section for the deuteron photodisintegration process. The remarkable sensitivity of the Delta rho 1 contributions of sigma 0 on the NN potentials is shown to come from the different short-range behaviour of these potentials.
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