Dynamical Relativistic Effects in Quasielastic1p-Shell Proton Knockout fromO16

We have measured the cross section for quasielastic $1p$-shell proton knockout in the ${}^{16}\mathrm{O}\left({e,e}^{\prime }p\right)$ reaction at $\omega =0.439\mathrm{}\mathrm{GeV}$ and $Q^2=0.8\mathrm{}(\mathrm{GeV}/c{)}^2$ for missing momentum $P_{\mathrm{miss}}\le 355\mathrm{MeV}/c$. We have extracted the response functions $R_{L+TT}$, $R_T$, $R_{\mathrm{LT}}$, and the left-right asymmetry, $A_{\mathrm{LT}}$, for the ${1p}_{1/2}$ and the ${1p}_{3/2}$ states. The data are well described by relativistic distorted wave impulse approximation calculations. At large $P_{\mathrm{miss}}$, the structure observed in $A_{\mathrm{LT}}$ indicates the existence of dynamical relativistic effects.