Quasi-Elastic Scattering Of Polarized Electrons From Polarized He-3 And Measurement Of The Neutrons Form-Factors

We report measurements of asymmetries in quasielastic scattering of polarized electrons from polarized He-3 at Q2 = -0.2 (GeV/C)2. We measure A(T') = (-2.6 +/- 0.9 +/- 0.46)% and A(TL') = (+1.75 +/- 1.2 +/- 0.31)%. The asymmetry A(T') depends predominantly on the previously measured neutron magnetic form factor and provides a test of theories of spin-dependent quasielastic scattering. Our result for A(T') is consistent with a previously reported measurement and suggests that the current theoretical picture is incomplete and final-state-interaction and meson-exchange corrections are necessary if the electric form factor of the neutron is to be reliably extracted from the asymmetry A(TL').