Breakdown of the Scaling Law for the Nucleon Electromagnetic Form Factors

Measurement of elastic electron-neutron scattering and inelastic electron-deuteron scattering cross sections at high momentum transfer

“…The ratio is insensitive to systematic uncertainties in the absolute acceptance, beam flux, beam energy and spectrometer settings. Elastic cross section data is often described [1,49] in terms of form factor scaling (G$ = GG/pp = G$/~N), which is fairly consistent with both previous data and preliminary NE11 data [50] f rom SLAC. The common assumption [49] that Gg -0 then yields values of a:'/~$ which are consistent with the data up to Q2 = 6.…”