Measurement of the asymmetries in 3 (¯e, e′p)d and 3 (¯e, e′p)np
/ Authors
P. Achenbach, D. Baumann, R. Boehm, B. Boillat, D. Bosnar, C. Carasco, M. Ding, M. Distler, J. Friedrich, W. Gloeckle
and 41 more authors
J. Golak, Y. Goussev, P. Grabmayr, W. Heil, A. Huegli, P. Jennewein, G. Mañas, J. Jourdan, H. Kamada, T. Klechneva, B. Krusche, K. W. Krygier, J. G. Llongo, M. Lloyd, M. Makek, H. Merkel, C. Micheli, U. Mueller, A. Nogga, R. Neuhausen, C. Normand, L. Nungesser, A. Ott, E. Otten, F. Parpan, R. Benito, M. Potokar, D. Rohe, D. Rudersdorf, J. Schmiedeskamp, M. Seimetz, I. Sick, S. Širca, R. Skibiński, S. Stave, G. Testa, R. Trojer, T. Walcher, M. Weis, H. Witała, H. Woehrle
/ Abstract
The electron target asymmetries A || and A ⊥ with target spin parallel and perpendicular to the momentum transfer were measured for both the two- and three-body breakup of 3 He in the 3 (¯ e , e’p )-reaction. Polarized electrons were scattered off polarized 3 He in the quasielastic regime in parallel kinematics with the scattered electron and the knocked-out proton detected using the Three-Spectrometer Facility at MAMI. The results are compared to Faddeev calculations which take into account Final-State Interactions as well as Meson Exchange Currents. The experiment confirms the prediction of a large effect of Final-State Interactions in the asymmetry of the three-body breakup and of an almost negligible one for the two-body breakup.
Journal: European Physical Journal A