Abstract
The polarization of the proton from the reaction in deuterium has been experimentally measured at 90° in the center-of-mass system for photon energies near 715 MeV by using a counter technique to observe the left to right asymmetry in the scattering of the protons from carbon. A value of -0.26±0.06 was observed, with the direction of the polarization defined by , where and are, respectively, unit vectors in the directions of the photon momentum and the pion momentum. The result is interpreted as an indication that the interference between the (325 MeV) and (750 MeV) resonances may not be the dominant contribution to the polarization at this energy. Significant contributions from either an interference between the (325 MeV) resonance and the possible new resonance suggested by the , scattering measurements, or an interference between the (750 MeV) and (1050 MeV) resonances, or a combination of these two possibilities seem to be required.
- Received 5 October 1962
DOI:https://doi.org/10.1103/PhysRev.129.2259
©1963 American Physical Society