Unexplained anomalies in quasielastic (e,e’) measurements motivated (e,e’p) experiments to determine the reaction mechanisms (single-nucleon knockout, multinucleon knockout, delta production, etc.) involved in quasielastic electron scattering. In this paper we use various models to extrapolate from C(e,e’p) measurements, where an outgoing proton is detected in a small solid angle centered around the virtual photon angle, to C(e,e’) measurements, which integrate over all knockedout particles at all angles. Extrapolated single nucleon knockout (p and s shell) only accounts for 25% of the (e,e’) cross section in the dip region and only 40–60 % in the quasielastic region. This indicates that the ‘‘quasielastic’’ region has a large nonquasielastic component. Various multinucleon knockout models (two-nucleon correlations, six-quark bags, and qualitative final state rescattering) are compared to C(e,e’p) missing energy spectra and to the difference between the (e,e’) cross section and the extrapolated single-nucleon knockout; none completely describe the data.

• Received 10 January 1994

DOI:https://doi.org/10.1103/PhysRevC.50.350