Measurement of elastic electron-neutron cross section up to Q2 = 10 GeV/c2

The internal electromagnetic structure of the nucleons has been an exciting field of experimental and theoretical research. With the advent of QCD, explicit predictions for the large Q2 behavior of elastic nucleon form factors have now been made. In order to extend the range in four-momentum transfer of a fundamental property of the nucleon, we have measured the elastic electron-neutron cross section up to Q2 = 10 (GeV/c)2. The experiment was performed at End Station A at SLAC by detecting electrons scattered from deuterium and by hydrogen targets. The incident beam energy was varied from 9.8 to 21 GeV in five steps. The 20 GeV spectrometer detected electrons at 100, with momentum settings that covered the entire quasi-elastic peak and well into the inelastic region. The elastic proton cross sections were measured absolutely and were found to be in excellent agreement with previous data