In this Letter, we report new measurements of the proton electromagnetic form factor ratio using the recoil polarization method, at momentum transfers Q2=5.2, 6.7, and 8.5??GeV2. By extending the range of Q2 for which GEp is accurately determined by more than 50%, these measurements will provide significant constraints on models of nucleon structure in the nonperturbative regime.
COBISS.SI-ID: 2252132
The electric form factor of the neutron GEn was determined from studies of the reaction 3He(e,e'n)pp in quasielastic kinematics. Longitudinally polarized electrons were scattered off a polarized target. The scattered electrons were detected in a magnetic spectrometer in coincidence with neutrons registered in a large-solid-angle detector. We more than doubled the Q2 range over which GEn is known.
COBISS.SI-ID: 2299748