Measurement of Elastic Electron Scattering from the Proton at High Momentum Transfer

We have performed absolute measurements of the differential cross section for elastic e-p scattering in the range of momentum transfer from Q²=2.9 to 31.3 (GeV/c)². Combined statistical and systematic uncertainties in the cross-section measurements ranged from 3% at low Q² to 19% at high Q². These data have been used to extract the proton magnetic form factor GMᵖ(Q²). The results show a smooth decrease of Q⁴GMᵖ with momentum transfer above Q²=10 (GeV/c)². These results are compared with recent predictions of perturbative QCD.