Observed Behavior of Highly Inelastic Electron-Proton Scattering

Results of electron-proton inelastic scattering at 6° and 10° are discussed, and values of the structure function $W_2$ are estimated. If the interaction is dominated by transverse virtual photons, $\nu W_2$ can be expressed as a function of $\omega =\frac{2M\nu }{q^2}$ within experimental errors for $q^2>1\mathrm{}$ ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^2$ and $\omega >4\mathrm{}$, where $\nu$ is the invariant energy transfer and $q^2$ is the invariant momentum transfer of the electron. Various theoretical models and sum rules are briefly discussed.