A Measurement of the Interference Structure Function, R_LT, for the 12C(e,e'p) reaction in the Quasielastic Region

Abstract

The coincidence cross-section and the interference structure function, R_LT, were measured for the 12C(e,e'p) 11B reaction at quasielastic kinematics and central momentum transfer of q=400 MeV/c. The measurement was at an opening angle of theta_pq=11 degrees, covering a range in missing energy of E_m = 0 to 65 MeV. The R_LT structure function is found to be consistent with zero for E_m > 50 MeV, confirming an earlier study which indicated that R_L vanishes in this region. The integrated strengths of the p- and s-shell are compared with a Distorted Wave Impulse Approximation calculation. The s-shell strength and shape are compared with a Hartree Fock-Random Phase Approximation calculation. The DWIA calculation overestimates the cross sections for p- and s-shell proton knockout as expected, but surprisingly agrees with the extracted R_LT value for both shells. The HF-RPA calculation describes the data more consistently, which may be due to the inclusion of 2-body currents in this calculation.

arXiv comment8 Pages LaTex, 5 postscript figures. Submitted to Phys. Rev. C

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• Electroinduced two-nucleon knockout and correlations in nuclei
• Multinucleon Mechanisms in ($\gamma$,N) and ($\gamma$,NN) Reactions
• Short-range correlations in (e,e${}^{\prime }$p) and (e,e${}^{\prime }$pp) reactions on complex nuclei
• Effects of meson-exchange currents on the $(\protect\vec{e},e'p)$ structure functions
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