Physical review letters
Author:
Keywords:
squared 4-momentum transfers, scattering cross sections, polarization transfer, elastic-scattering, momentum-transfers, gas-target, nucleon, neutron, (gev/c)(2), deuteron, Science & Technology, Physical Sciences, Physics, Multidisciplinary, Physics, SQUARED 4-MOMENTUM TRANSFERS, SCATTERING CROSS-SECTIONS, POLARIZATION TRANSFER, ELASTIC-SCATTERING, GAS-TARGET, NUCLEON, NEUTRON, 01 Mathematical Sciences, 02 Physical Sciences, 09 Engineering, General Physics, 40 Engineering, 49 Mathematical sciences, 51 Physical sciences
Abstract:
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.