Inclusive Nucleon Resonance Electroproduction at Large Momentum Transfer

Measurements of nucleon resonance cross sections for large angle electron scattering from deuterium and hydrogen are reported for incident energies of lt E0 lt 9.75 GeV. The data were obtained using the Nuclear Physics Injector beam at the Stanford Linear Accelerator Center (SLAC). Scattered electrons were detected in both the 8 GeV and 1.6 GeV spectrometers in End Station A. The experimental technique and the method of analysis are described in detail. The cross sections are used in conjunction with previous SLAC data to perform Rosenbluth separations and to measure the longitudinal component of the cross sections. The ratio of the longitudinal and transverse components of the cross section is found to be small throughout the entire resonance region. Some reanalysis of the older data is outlined. This reanalysis was also useful in developing a global fit to all available SLAC resonance region data. Results from this fit are presented along with both the new and older spectra. Possible evidence in the older data for the Roper P11 (1440) resonance is discussed. The Delta P33(1232) resonance form factor has been measured and is found to fall off faster than Q-4 but not as fast as had been previously observed