Measurement of the asymmetries in 3He(e,e'p)d and 3He(e,e'p)np

Eur.Phys.J.A25:177-183,2005 The electron-target-asymmetries A_parallel and A_perpendicular with target spin parallel and perpendicular to the momentum transfer q were measured for both the two-- and three-body breakup of 3He in the 3He(e,e'p)-reaction. Polarized electrons were scattered off pol...

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Hauptverfasser: Achenbach, P, Baumann, D, Boehm, R, Boillat, B, Bosnar, D, Carasco, C, Ding, M, Distler, M. O, Friedrich, J, Gloeckle, W, Golak, J, Goussev, Y, Grabmayr, P, Heil, W, Huegli, A, Jennewein, P, Manas, G. Jover, Jourdan, J, Kamada, H, Klechneva, T, Krusche, B, Krygier, K. W, Llongo, J. G, Lloyd, M, Makek, M, Merkel, H, Micheli, C, Mueller, U, Nogga, A, Neuhausen, R, Normand, Ch, Nungesser, L, Ott, A, Otten, E, Parpan, F, Benito, R. Perez, Potokar, M, Rohe, D, Rudersdorf, D, Schmiedeskamp, J, Seimetz, M, Sick, I, Sirca, S, Skibinski, R, Stave, S, Testa, G, Trojer, R, Walcher, Th, Weis, M, Witala, H, Woehrle, H
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Sprache:eng
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Zusammenfassung:Eur.Phys.J.A25:177-183,2005 The electron-target-asymmetries A_parallel and A_perpendicular with target spin parallel and perpendicular to the momentum transfer q were measured for both the two-- and three-body breakup of 3He in the 3He(e,e'p)-reaction. Polarized electrons were scattered off polarized 3He 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.
DOI:10.48550/arxiv.nucl-ex/0505012