Measurement of Elastic Electron-Neutron Cross Sections up to $Q^2=10\mathrm{}$ ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^2$

The elastic electron-neutron cross section has been measured at four-momentum transfers squared ($Q^2$) of 2.5, 4.0, 6.0, 8.0, and 10.0 ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^2$ with use of a deuterium target and detection of the scattered electrons at 10°. The ratio of neutron to proton elastic cross sections decreases with $Q^2$. At high $Q^2$ this trend is inconsistent with the dipole law, form-factor scaling, and many vector dominance models, although it is consistent with some parton models.