it should be attributed to the effective single-nucleon current operator instead of to spectroscopic factors which are probe-independent properties of nuclear structure. However, remediation of the failure of RDWIA calculations to reproduce low $Q^2$ data for parallel kinematics will require a more sophisticated modification of the current than a simple multiplicative factor.'
author:
- 'James J. Kelly'
date: 'January 28, 2005'
title: 'RDWIA analysis of $^{12}$C$(e,e^\prime p)$ for $Q^2 < 2$ (GeV/$c$)$^2$'
---

Introduction
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It is generally believed that single-nucleon electromagnetic knockout provides unambiguous measurements of the momentum distributions and spectroscopic factors for single-hole states near the Fermi surface. Reviews of analyses based upon the nonrelativistic distorted-wave impulse approximation (NRDWIA) can be found in Refs. [@Lapikas93; @Kelly96; @Boffi96], which show that the momentum distributions are described well by mean-field calculations, such as Skyrme-Hartree-Fock, while spectroscopic factors for low-lying state are reduced relative to the independent particle shell model (IPSM) by an average factor of about $65\%$ over a broad range of $A$. Part of the depletion of IPSM strength can be attributed to short-range correlations that shift approximately $15\%$ of the hole strength to very large missing energies, beyond 100 MeV. Recently, a direct measurement of the spectral function 