Author(s): Breidenbach M
he results of the SLAC-MIT electron-proton inelastic scat- tering experiment at 6” and 10” are discussed. Although the kinematic range of these measurements is insufficient to separate the structure functions Wl and W2, estimates of W2 can be ob- ( tained. If the interaction is dominated by transverse virtual photons, W2 can be expressed as a function of w = 2 M v /q2 within experimental errors for q2 > 1 and w > 4, where v is the invariant energy transfer 2 and q is the invariant momentum transfer of the electron. Various theoretical models are briefly discussed, and the predictions of sev- eral sum rules are compared with the data.