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The nonlocal implementation of the dispersive optical model (DOM) providesall the ingredients for distorted-wave impulse-approximation (DWIA)calculations of the $(e,e'p)$ reaction. It provides both the overlap function,including its normalization, and the outgoing proton distorted wave. Thisframework is applied to describe the knockout of a proton from the$0\textrm{d}\frac{3}{2}$ and $1\textrm{s}\frac{1}{2}$ orbitals in ${}^{40}$Cawith fixed normalizations of 0.71 and 0.60, respectively. Data were obtained inparallel kinematics for three outgoing proton energies: 70, 100, and 135 MeV.Agreement with the data is as good as, or better than, previous descriptionsemploying local optical potentials and overlap functions from Woods-Saxonpotentials - both with standard nonlocality corrections - whose normalization(spectroscopic factor) and radius were fitted to the data. The present analysissuggests that slightly larger spectroscopic factors are obtained when nonlocaloptical potentials are employed than those generated with local potentials. Theresults further suggest that the chosen kinematical window around 100 MeVproton energy provides the best and cleanest method to employ the DWIA for theanalysis of this reaction. The conclusion that substantial ground-statecorrelations cannot be ignored when describing a closed-shell atomic nucleus istherefore confirmed in detail. To reach these conclusions, it is essential tohave a complete description of the nucleon single-particle propagator thataccounts for all elastic nucleon-scattering observables in a wide energy domainup to 200 MeV. The current nonlocal implementation of the DOM fulfills thisrequirement.

physical review. c

Validity of the distorted-wave impulse-approximation description of  ${}^{40}$Ca$(e,e'p)^{39}$K data using only ingredients from a nonlocal  dispersive optical model