Impulse Approximation limitations to the $(e,e'p)$ reaction on $^{208}$Pb: search for long range correlations at high missing momenta

ORAL

Abstract

Experiment E06007 at Jefferson Lab measured cross sections for the $(e,e'p)$ reaction at constant $(\textbf{q},\omega)$ for Q$^2$ = 0.81 GeV$^2$ over a range of missing momenta from 0 to 500 MeV/c. Spectroscopic factors for states near the Fermi level are typically in the range of 0.65-0.70, a feature usually attributable to short range and long range correlations. It has been conjectured that long range correlations should also have a significant effect on the strength of high momentum components of single nucleon states near the fermi level. Cross sections for missing momenta from 300 MeV/c to 500 MeV/c for the $^{208}$Pb(e,e'p) reaction going to the low lying states of $^{207}$Tl will be presented and compared to theoretical predictions using various prescriptions for including correlations. Data from two recent runs will be presented.

Authors

  • Alexandre Camsonne

    Jefferson Lab

  • Juan Carlos Cornejo

    Cal. State Univ. , Los Angeles, Cal. State Univ., Los Angeles

  • Joaquin Lopez Herraiz

    U. Comp. de Madrid