Abstract
Nucleon pole contribution in the reaction below the threshold of the production of the meson is studied within the effective Lagrangian approach. It is assumed that the final state originates from the decay of the hyperons and . In addition to the final state interaction (FSI) parametrized using the Jost function, we have also considered the FSI with the techniques of the chiral unitary approach, where the scalar mesons and were dynamically generated. Hence, the contributions from scalar mesons and occur through the FSI. It is shown that the available experimental data are well reproduced, especially the total cross sections and the invariant mass distributions of and . Furthermore, different forms of the couplings (pseudoscalar and pseudovector) for the interaction and different strengths for the proton-proton FSI are also investigated. It is found that the contributions from hyperons and are different between these two kinds of couplings. On the other hand, the effects of the proton-proton FSI can be adjusted by the cutoff parameters used in the form factors.
- Received 27 April 2014
DOI:https://doi.org/10.1103/PhysRevC.90.034002
©2014 American Physical Society