Experience E89-044 de diffusion quasi-elastique $^(3)$He(e,e'p) au Jefferson Laboratory : analyse des sections efficaces de desintegration a deux corps en cinematique parallele

Abstract : The Jefferson Lab Hall A E89-044 experiment has measured the 3He(e,e'p) reaction cross-sections. The extraction of the longitudinal and transverse response functions for the two-body break-up 3He(e,e'p)d reaction in parallel kinematics allows the study of the bound proton electromagnetic properties inside the 3He nucleus and the involved nuclear mechanisms beyond plane waves approximations, for missing momenta of 0 and +- 300 MeV/c and transferred momenta from 0.8 to 4.1 GeV2. Preliminary cross-sections have been obtained after calibration of the experimental setup by fitting theoretical models averaged over the experimental phase-space using a Monte-carlo simulation. The 8% systematic error on cross-sections is linked mainly to the absolute normalization of the target density : the elastic scattering data analysis will allow to reduce this error. The preliminary results show some disagreement with theoretical predictions for the forward angles kinematics around 0 MeV/c missing momenta and sensitivity to final state interactions and 3He waves functions for missing momenta of 300 MeV/c. The longitudinal and transverse separation should constraint theoretical models more strongly.
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Submitted on : Tuesday, September 7, 2004 - 4:54:57 PM
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• HAL Id : tel-00006829, version 1

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Emilie Penel-Nottaris. Experience E89-044 de diffusion quasi-elastique $^(3)$He(e,e'p) au Jefferson Laboratory : analyse des sections efficaces de desintegration a deux corps en cinematique parallele. Physique Nucléaire Théorique [nucl-th]. Université Joseph-Fourier - Grenoble I, 2004. Français. ⟨tel-00006829⟩

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