Abstract
The coupling strength to the channel, , is extracted from the latest and largest photoproduction database by using an isobar model. It is found that the coupling is small. In terms of the coupling ratio the best result is , much smaller than that obtained from the isobar analysis of the decays, i.e., , but consistent with the results of the unitary chiral approach of the same decay processes as well as the partial wave analysis of kaon photoproduction, i.e., . The different results of found here and in the literature to date suggest that a more solid definition of the coupling constant, especially in the case of the state, is urgently required before a fair comparison can be made.
- Received 17 September 2012
DOI:https://doi.org/10.1103/PhysRevC.87.042201
©2013 American Physical Society