Abstract
Data on single pion photoproduction in the resonance region have been fitted with a model used previously by one of the authors (RLW). In updating the older fit a considerable amount of new data has been incorporated, the energy range has been extended to a total c.m. energy W = 2.0 GeV, and the procedure followed in making the fit has been changed so as to make greater use of the computer. In the model used for the analysis the pion photoproduction amplitude is composed of three parts: (1) the electric Born approximation, (2) Breit-Wigner resonances, and (3) additional “background” contributions in the lower partial waves. The electromagnetic couplings of many of the πN resonances with masses below 2 GeV have been determined in the analysis, and the results are compared to quark model predictions.
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