Comparison of two K-matrix pole structures of the PccÌ… (4312)+ pentaquark
Abstract
We present and implement two-channel K-matrix parametrization models for describing the nature of the observed Pcc̅ (4312)+ pentaquark in the ΛbⰠ→ J/ψ K−p$ decay. In this two-channel analysis, the K-matrix approach was done in order to reproduce the scattering data of the J/ψp invariant mass distribution while taking into account possible near-threshold phenomena imposed by Σc+D̅Ⱐchannel. The inclusion of non-resonant terms yields an ambiguous three-pole structure where one pole manifests at each unphysical complex energy E Riemann sheet. The results agree with recent studies that implemented a model-independent framework in determining the pole structure of the same pentaquark. The obtained fit and pole parameters provides an argument to support a hybrid interpretation of a compact state possibly contaminated by a pole in the [tb] sheet.
Downloads
Published
Issue
Section
License
By submitting their manuscript to the Samahang Pisika ng Pilipinas (SPP) for consideration, the Authors warrant that their work is original, does not infringe on existing copyrights, and is not under active consideration for publication elsewhere.
Upon acceptance of their manuscript, the Authors further agree to grant SPP the non-exclusive, worldwide, and royalty-free rights to record, edit, copy, reproduce, publish, distribute, and use all or part of the manuscript for any purpose, in any media now existing or developed in the future, either individually or as part of a collection.
All other associated economic and moral rights as granted by the Intellectual Property Code of the Philippines are maintained by the Authors.
