Separated structure functions for the proton-knockout reactionO16(e,e’p)

Three structure functions have been determined in the reaction ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$(e,e’p${)}^{15}$N at ${\mathit{Q}}^2$=0.20 (GeV/c${)}^2$ for 1${\mathit{p}}_{1/2}$ and 1${\mathit{p}}_{3/2}$ knockout and for the excitation of the (5/$2^{+}$,1/$2^{+}$) doublet at ${\mathit{E}}_{\mathit{x}}$=5.3 MeV in ${}_{}{}^{15}{}_{}{}^{}\mathrm{N}$. The longitudinal-transverse interference structure function ${\mathit{W}}_{\mathit{L}\mathit{T}}$ is enhanced by a factor 2.05±0.06±0.12 for 1${\mathit{p}}_{3/2}$ knockout and by a factor 1.50±0.10±0.08 for 1${\mathit{p}}_{1/2}$ knockout with respect to a calculation that gives a proper account of data taken in parallel kinematics. The longitudinal structure function ${\mathit{W}}_{\mathit{L}}$ is also enhanced, albeit less with respect to these calculations.