Extraction of the Neutron Magnetic Form Factor from Quasi-Elastic 3He(pol)(e(pol),e') at Q2 = 0.1 - 0.6 (GeV/c)2
001 Collaboration
Abstract
We have measured the spin-dependent transverse asymmetry, AT', in quasi-elastic inclusive electron scattering from polarized 3He with high precision at Q2 = 0.1 to 0.6 (GeV/c)2. The neutron magnetic form factor, GMn, was extracted at Q2 = 0.1 and 0.2 (GeV/c)2 using a non-relativistic Faddeev calculation that includes both final-state interactions (FSI) and meson-exchange currents (MEC). In addition, GMn was extracted at Q2 = 0.3 to 0.6 (GeV/c)2 using a Plane Wave Impulse Approximation calculation. The accuracy of the modeling of FSI and MEC effects was tested and confirmed with a precision measurement of the spin-dependent asymmetry in the breakup threshold region of the 3He(pol)(e(pol),e') reaction. The total relative uncertainty of the extracted GMn data is approximately 3%. Close agreement was found with other recent high-precision GMn data in this Q2 range.
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