Electrons have been scattered inelastically from an alcohol-water target containing protons polarized normal to the scattering plane. Scattered-electron energies corresponding to the excitation of the 1236-, 1512-, and 1688-MeV nucleon resonances were observed at four-momentum transfers between 0.2 and 0.7 (BeV/c) 2 . A search was made for changes in the intensity of the scattered electrons as the target polarization was reversed. None was seen.
Fluon inelastic scattering has been measured using muons with momenta bctxeen 8.6 and 12.3 GeV/c on a carbon target. The virtual al photoproduction cross section is presented as a function of the four mozxnturn transfer from the won.
Electrons have been scattered inelastically from a hydrocarbon target containing protons polarized normal to the scattering plane. Scattered electrons with energies corresponding to the production of the A(1236), N(1512), and N(1688) pion-nucleon resonances were observed. A search was made for changes in the cross section as the target polarization was reversed. Any changes would have been evidence of a violation of time-reversal invariance in the electromagnetic interactions of the hadrons. KO such changes were observed. With the maximum time-reversal-violating effect possible, the asymmetry would be 10 times the upper limit of this experiment. Early attempts a t a coincidence-polarization experiment are described in an appendix. * Supported by the Atomic Energy Commission.
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