The chiral constituent quark model is applied to predict the magnetic and electric amplitudes of the transition. It is found that the one-meson-exchange quark-quark potential due to the chiral fields enhances the ratio by a factor of about 2. The predicted amplitude and the ratio are within the range determined from a recent analysis of the data of pion photoproduction.
- Received 12 December 1996
- Published in the issue dated April 1997
© 1997 The American Physical Society