Recoil Polarization Measurements in π0 Electroproduction at the Peak of the Δ(1232)

This talk presents a Status Report, along with some preliminary/on-line results, from the Thomas Jefferson National Accelerator Facility (JLab) experiment E91-011 which was performed in Hall A at JLab during the summer of 2000. The experiment measured angular distributions for the differential cross section and recoil-proton polarizations in the reaction p( {vec e,e' vec p} ; )π ⁰ . Kinematics were chosen to be centered at a CMS energy of W = 1232 MeV, and a squared four-momentum transfer of Q² = 1.0 (GeV/c)². The primary objectives of the experiment are to isolate contributions from the resonant quadrupole N → Δ multipole, S₁₊, and to clarify the role of other, small non-resonant multipole contributions to the reaction. Details of the experiment itself will be given, along with sample spectra illustrating the quality and coverage of the data obtained.