Abstract
The charge form factor of a scalar deuteron at high momentum transfer is examined in a model employing scalar nucleons and mesons. With an eye towards establishing consistency criteria for more realistic calculations, several aspects of the model are examined in detail: the role of nucleon and meson singularities in the one-loop impulse diagram, the role of positive- and negative-energy nucleons, and the relationship to time-ordered perturbation theory. It is found that at large ${Q}^{2}$ (1) the form factor is dominated by a term in which the spectator nucleon is on the mass shell, and (2) the meson singularity structure of the d-n-p vertex function is unimportant in determining the overall high-${Q}^{2}$ behavior of the form factor.NUCLEAR REACTIONS Elastic electron scattering at high momentum transfer. Relativistic impulse approximation. Role of negative-energy nucleons. Role of meson singularities.
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