Longitudinal-transverse separation of the deuterium (e,e’p) response functions

In the four-momentum-transfer range 0.05≤${\mathit{q}}_{\nu }^2$≤0.27 (GeV/c${)}^2$, longitudinal and transverse response functions have been determined by performing a Rosenbluth separation of ${}_{}{}^2{}_{}{}^{}\mathrm{H}$(e,e’p) coincidence cross sections measured in parallel kinematics. The results are compared to nonrelativistic calculations that include the effects of final-state interaction, meson-exchange currents, and isobar configurations, and to relativistic calculations that include the effects of final-state interaction. The ratios of the response functions agree with both calculations; the absolute values are (16±3±8)% larger than predicted.