Abstract
A combined analysis of the reactions , and is carried out with a chiral quark model. The observations are reasonably described from the resonance region up to the resonance region. Besides the , a confirmed role of is found in the polarizations of the and reactions. It is found that the and couplings are about 1.7 and 4.8 times larger than the expectations from the simple quark model, respectively, which may suggest the unusual property of and deficiency of the simple quark model in the description of and . The - and -channel backgrounds have notable contributions to the reaction, while in the reactions, the -channel nucleon and - and -channel backgrounds play crucial roles.
4 More- Received 17 September 2016
- Revised 14 February 2017
DOI:https://doi.org/10.1103/PhysRevC.95.055204
©2017 American Physical Society