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19 April 2024

» arxiv » nucl-ex/0505012

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Measurement of the asymmetries in 3He(e,e'p)d and 3He(e,e'p)np
P. Achenbach ; D. Baumann ; R. Boehm ; B. Boillat ; D. Bosnar ; C. Carasco ; M. Ding ; M. O. Distler ; J. Friedrich ; W. Gloeckle ; J. Golak ; Y. Goussev ; P. Grabmayr ; W. Heil ; A. Huegli ; P. Jennewein ; G. Jover Manas ; 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 ; Ch. Normand ; L. Nungesser ; A. Ott ; E. Otten ; F. Parpan ; R. Perez Benito ; M. Potokar ; D. Rohe ; D. Rudersdorf ; J. Schmiedeskamp ; M. Seimetz ; I. Sick ; S. Sirca ; R. Skibinski ; S. Stave ; G. Testa ; R. Trojer ; Th. Walcher ; M. Weis ; H. Witala ; H. Woehrle ;
Date:	11 May 2005
Journal:	Eur.Phys.J. A25 (2005) 177-183
Subject:	nucl-ex
Abstract:	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.
Source:	arXiv, nucl-ex/0505012
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