Abstract
In this work, the role of the resonances in the process of are systematically investigated with the effective Lagrangian approach and the isobar model. We find that a state, either or is favored by the data while the state, namely , has small contribution. Besides, either the subthreshold resonance or strong final state interaction or both have a possible contribution at near threshold region, depending on the measured cross sections. We demonstrate the invariant mass distributions and the Dalitz plots in order to investigate whether it is possible to distinguish the controversial production mechanism in these observables.
- Received 21 December 2014
- Revised 3 June 2015
DOI:https://doi.org/10.1103/PhysRevC.92.015202
©2015 American Physical Society