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

M. Holtrop; D. Jordan; T. McIlvain; R. Alarcon; R. Beck; W. Bertozzi; V. Bhushan; W. Boeglin; J. P. Chen; D. Dale; G. Dodson; S. Dolfini; K. Dow; J. Dzengeleski; M. B. Epstein; M. Farkhondeh; S. Gilad; J. Gorgen; K. Joo; J. Kelsey; W. Kim; R. Laszewski; R. Lourie; J. Mandeville; D. Margaziotis; D. Martinez; R. Miskimen; C. Papanicolas; S. Penn; W. Sapp; A. J. Sarty; D. Tieger; C. Tschalaer; W. Turchinetz; G. Warren; L. Weinstein; S. Williamson

doi:10.1103/physrevc.58.3205

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

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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.

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M. Holtrop, D. Jordan, T. McIlvain, R. Alarcon, R. Beck, W. Bertozzi, V. Bhushan, W. Boeglin, J. P. Chen, D. Dale, G. Dodson, S. Dolfini, K. Dow, J. Dzengeleski, M. B. Epstein, M. Farkhondeh, S. Gilad, J. Gorgen, K. Joo, J. Kelsey, W. Kim, R. Laszewski, R. Lourie, J. Mandeville, D. Margaziotis, D. Martinez, R. Miskimen, C. Papanicolas, S. Penn, W. Sapp, A. J. Sarty, D. Tieger, C. Tschalaer, W. Turchinetz, G. Warren, L. Weinstein, S. Williamson. 1998-03-25. A Measurement of the Interference Structure Function, R_LT, for the 12C(e,e'p) reaction in the Quasielastic Region. https://doi.org/10.1103/physrevc.58.3205

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