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High-precision Studies of the 3He(e,ep) Reaction at the Quasielastic Peak

R. E. J. Florizone, W. Bertozzi, J. P. Chen, D. Dale, S. Gilad, A. J. Sarty, J. A. Templon, S. P. Van Verst, J. Zhao, Z. -L. Zhou, P. Bartsch, W. U. Boeglin, R. Böhm, M. O. Distler, I. Ewald, J. Friedrich, J. M. Friedrich, R. Geiges, P. Jennewein, M. Kahrau, K. W. Krygier, A. Liesenfeld, H. Merkel, K. Merle, U. Müller, R. Neuhausen, E. A. J. M. Offermann, Th. Pospischil, G. Rosner, H. Schmieden, A. Wagner, Th. Walcher, K. A. Aniol, M. B. Epstein, D. J. Margaziotis, M. Kuss, A. Richter, G. Schrieder, K. Bohinc, M. Potokar, S. Širca

nucl-exarXiv:nucl-ex/9908004

Abstract

Precision studies of the reaction 3He(e,e) using the three-spectrometer facility at the Mainz microtron MAMI are presented. All data are for quasielastic kinematics at |q | =685 MeV/c. Absolute cross sections were measured at three electron kinematics. For the measured missing momenta range from 10 to 165 MeV/c, no strength is observed for missing energies higher than 20 MeV. Distorted momentum distributions were extracted for the two-body breakup and the continuum. The longitudinal and transverse behavior was studied by measuring the cross section for three photon polarizations. The longitudinal and transverse nature of the cross sections is well described by a currently accepted and widely used prescription of the off-shell electron-nucleon cross-section. The results are compared to modern three-body calculations and to previous data.

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