The transverse-longitudinal asymmetry A&« in 'He(e, e') quasielastic scattering at momentum transfer Q' = 0.14(GeV/c)2 has been measured to be 1.52~0.55(stat)~0.15(syst)%. The plane wave impulse approximation (PWIA) prediction for this measurement ranges from 2.1% to 2.9%, where the variation is due to uncertainty in the initial state wave function, nucleon form factors, and off-shell prescription. The data may suggest a suppression with respect to the PWIA, which has also been observed for the unpolarized longitudinal response function.
The spin asymmetries in the momentum distributions of the neutron and proton in 3He are obtained from a Faddeev calculation of the ground state. Both two-and three-body configurations are found to be important. Using a PWIA model and measurements of the spin asymmetries in 3&( j?,2p) and 3s( j?',pn) quasielastic scattering at 197 MeV the asymmetries in the momentum distributions are experimentally determined. Good agreement between theory and experiment is found up to initial nucleon momenta of 300 MeV/c.
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