Electron-Proton Coincidences in Inelastic Electron-Deuteron Scattering

Electron-proton coincidences in inelastic electron-deuteron scattering were detected under the following conditions: incident beam energy 500 MeV; electron scattered at 75° and 359 MeV; proton detected at 40° 23′ (the q direction for the $e-p$ elastic scattering). The coincidence cross-section with a ${\mathrm{D}}_2$ target was found to be (4.2±0.8)×${10}^{-32\mathrm{}}$ ${\mathrm{cm}}^2$/${\mathrm{sr}}^2$ MeV. The experimental result agreed, within the statistical errors, with the value calculated from a theory of Durand. One may conclude that proton form factors in a bound state and the free state do not differ significantly.