The repository implements the pipi parametrization from "Coupled channel analysis of pp→π ηη and at 900 MeV/c and of ππ-scattering data", with the supplemental material
Several pipi scattering amplitude are available elsewhere:
- Amplitude by the Madrid group, PiPiMadrid.jl
- Anisovich-Sarantsev K-matrix, in the PR of international K-matrix day
The implementation is based on Wolfram Mathematica implementation of Bertram Kopf. We use parameters given in the paper supplemental material which are truncated to five digits.
Please cite the original paper, link to inspire. You can refer to Julia implementation with a Zenodo DOI, link to Zenodo.