Measurement of the Proton’s Electric to Magnetic Form Factor Ratio from
Physical review letters(2007)
摘要
We report the first precision measurement of the proton electric to magnetic form factor ratio from spin-dependent elastic scattering of longitudinally polarized electrons from a polarized hydrogen internal gas target. The measurement was performed at the MIT-Bates South Hall Ring over a range of four-momentum transfer squared Q 2 from 0.15 to 0.65 (GeV/c) 2. Significantly improved results on the proton electric and magnetic form factors are obtained in combination with existing cross-section data on elastic electron-proton scattering in the same Q 2 region.
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